Remove some of the old demos. (Put a few somewhere else.)

14 files changed, 0 insertions, 1391 deletions

diff --git a/Demo/scripts/eqfix.py b/Demo/scripts/eqfix.py
deleted file mode 100755
index 8d0c8df..0000000
--- a/Demo/scripts/eqfix.py
+++ /dev/null
@@ -1,198 +0,0 @@
-#! /usr/bin/env python3
-
-# Fix Python source files to use the new equality test operator, i.e.,
-#       if x = y: ...
-# is changed to
-#       if x == y: ...
-# The script correctly tokenizes the Python program to reliably
-# distinguish between assignments and equality tests.
-#
-# Command line arguments are files or directories to be processed.
-# Directories are searched recursively for files whose name looks
-# like a python module.
-# Symbolic links are always ignored (except as explicit directory
-# arguments).  Of course, the original file is kept as a back-up
-# (with a "~" attached to its name).
-# It complains about binaries (files containing null bytes)
-# and about files that are ostensibly not Python files: if the first
-# line starts with '#!' and does not contain the string 'python'.
-#
-# Changes made are reported to stdout in a diff-like format.
-#
-# Undoubtedly you can do this using find and sed or perl, but this is
-# a nice example of Python code that recurses down a directory tree
-# and uses regular expressions.  Also note several subtleties like
-# preserving the file's mode and avoiding to even write a temp file
-# when no changes are needed for a file.
-#
-# NB: by changing only the function fixline() you can turn this
-# into a program for a different change to Python programs...
-
-import sys
-import re
-import os
-from stat import *
-import string
-
-err = sys.stderr.write
-dbg = err
-rep = sys.stdout.write
-
-def main():
-    bad = 0
-    if not sys.argv[1:]: # No arguments
-        err('usage: ' + sys.argv[0] + ' file-or-directory ...\n')
-        sys.exit(2)
-    for arg in sys.argv[1:]:
-        if os.path.isdir(arg):
-            if recursedown(arg): bad = 1
-        elif os.path.islink(arg):
-            err(arg + ': will not process symbolic links\n')
-            bad = 1
-        else:
-            if fix(arg): bad = 1
-    sys.exit(bad)
-
-ispythonprog = re.compile('^[a-zA-Z0-9_]+\.py$')
-def ispython(name):
-    return ispythonprog.match(name) >= 0
-
-def recursedown(dirname):
-    dbg('recursedown(%r)\n' % (dirname,))
-    bad = 0
-    try:
-        names = os.listdir(dirname)
-    except os.error as msg:
-        err('%s: cannot list directory: %r\n' % (dirname, msg))
-        return 1
-    names.sort()
-    subdirs = []
-    for name in names:
-        if name in (os.curdir, os.pardir): continue
-        fullname = os.path.join(dirname, name)
-        if os.path.islink(fullname): pass
-        elif os.path.isdir(fullname):
-            subdirs.append(fullname)
-        elif ispython(name):
-            if fix(fullname): bad = 1
-    for fullname in subdirs:
-        if recursedown(fullname): bad = 1
-    return bad
-
-def fix(filename):
-##      dbg('fix(%r)\n' % (dirname,))
-    try:
-        f = open(filename, 'r')
-    except IOError as msg:
-        err('%s: cannot open: %r\n' % (filename, msg))
-        return 1
-    head, tail = os.path.split(filename)
-    tempname = os.path.join(head, '@' + tail)
-    g = None
-    # If we find a match, we rewind the file and start over but
-    # now copy everything to a temp file.
-    lineno = 0
-    while 1:
-        line = f.readline()
-        if not line: break
-        lineno = lineno + 1
-        if g is None and '\0' in line:
-            # Check for binary files
-            err(filename + ': contains null bytes; not fixed\n')
-            f.close()
-            return 1
-        if lineno == 1 and g is None and line[:2] == '#!':
-            # Check for non-Python scripts
-            words = string.split(line[2:])
-            if words and re.search('[pP]ython', words[0]) < 0:
-                msg = filename + ': ' + words[0]
-                msg = msg + ' script; not fixed\n'
-                err(msg)
-                f.close()
-                return 1
-        while line[-2:] == '\\\n':
-            nextline = f.readline()
-            if not nextline: break
-            line = line + nextline
-            lineno = lineno + 1
-        newline = fixline(line)
-        if newline != line:
-            if g is None:
-                try:
-                    g = open(tempname, 'w')
-                except IOError as msg:
-                    f.close()
-                    err('%s: cannot create: %r\n' % (tempname, msg))
-                    return 1
-                f.seek(0)
-                lineno = 0
-                rep(filename + ':\n')
-                continue # restart from the beginning
-            rep(repr(lineno) + '\n')
-            rep('< ' + line)
-            rep('> ' + newline)
-        if g is not None:
-            g.write(newline)
-
-    # End of file
-    f.close()
-    if not g: return 0 # No changes
-
-    # Finishing touch -- move files
-
-    # First copy the file's mode to the temp file
-    try:
-        statbuf = os.stat(filename)
-        os.chmod(tempname, statbuf[ST_MODE] & 0o7777)
-    except os.error as msg:
-        err('%s: warning: chmod failed (%r)\n' % (tempname, msg))
-    # Then make a backup of the original file as filename~
-    try:
-        os.rename(filename, filename + '~')
-    except os.error as msg:
-        err('%s: warning: backup failed (%r)\n' % (filename, msg))
-    # Now move the temp file to the original file
-    try:
-        os.rename(tempname, filename)
-    except os.error as msg:
-        err('%s: rename failed (%r)\n' % (filename, msg))
-        return 1
-    # Return succes
-    return 0
-
-
-from tokenize import tokenprog
-
-match = {'if':':', 'elif':':', 'while':':', 'return':'\n', \
-         '(':')', '[':']', '{':'}', '`':'`'}
-
-def fixline(line):
-    # Quick check for easy case
-    if '=' not in line: return line
-
-    i, n = 0, len(line)
-    stack = []
-    while i < n:
-        j = tokenprog.match(line, i)
-        if j < 0:
-            # A bad token; forget about the rest of this line
-            print('(Syntax error:)')
-            print(line, end=' ')
-            return line
-        a, b = tokenprog.regs[3] # Location of the token proper
-        token = line[a:b]
-        i = i+j
-        if stack and token == stack[-1]:
-            del stack[-1]
-        elif token in match:
-            stack.append(match[token])
-        elif token == '=' and stack:
-            line = line[:a] + '==' + line[b:]
-            i, n = a + len('=='), len(line)
-        elif token == '==' and not stack:
-            print('(Warning: \'==\' at top level:)')
-            print(line, end=' ')
-    return line
-
-if __name__ == "__main__":
-    main()
diff --git a/Demo/scripts/find-uname.py b/Demo/scripts/find-uname.py
deleted file mode 100755
index b6ec1b6..0000000
--- a/Demo/scripts/find-uname.py
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-For each argument on the command line, look for it in the set of all Unicode
-names.  Arguments are treated as case-insensitive regular expressions, e.g.:
-
-    % find-uname 'small letter a$' 'horizontal line'
-    *** small letter a$ matches ***
-    LATIN SMALL LETTER A (97)
-    COMBINING LATIN SMALL LETTER A (867)
-    CYRILLIC SMALL LETTER A (1072)
-    PARENTHESIZED LATIN SMALL LETTER A (9372)
-    CIRCLED LATIN SMALL LETTER A (9424)
-    FULLWIDTH LATIN SMALL LETTER A (65345)
-    *** horizontal line matches ***
-    HORIZONTAL LINE EXTENSION (9135)
-"""
-
-import unicodedata
-import sys
-import re
-
-def main(args):
-    unicode_names = []
-    for ix in range(sys.maxunicode+1):
-        try:
-            unicode_names.append((ix, unicodedata.name(chr(ix))))
-        except ValueError: # no name for the character
-            pass
-    for arg in args:
-        pat = re.compile(arg, re.I)
-        matches = [(y,x) for (x,y) in unicode_names
-                   if pat.search(y) is not None]
-        if matches:
-            print("***", arg, "matches", "***")
-            for match in matches:
-                print("%s (%d)" % match)
-
-if __name__ == "__main__":
-    main(sys.argv[1:])
diff --git a/Demo/scripts/from.py b/Demo/scripts/from.py
deleted file mode 100755
index c8a9346..0000000
--- a/Demo/scripts/from.py
+++ /dev/null
@@ -1,35 +0,0 @@
-#! /usr/bin/env python3
-
-# Print From and Subject of messages in $MAIL.
-# Extension to multiple mailboxes and other bells & whistles are left
-# as exercises for the reader.
-
-import sys, os
-
-# Open mailbox file.  Exits with exception when this fails.
-
-try:
-    mailbox = os.environ['MAIL']
-except (AttributeError, KeyError):
-    sys.stderr.write('No environment variable $MAIL\n')
-    sys.exit(2)
-
-try:
-    mail = open(mailbox)
-except IOError:
-    sys.exit('Cannot open mailbox file: ' + mailbox)
-
-while 1:
-    line = mail.readline()
-    if not line:
-        break # EOF
-    if line.startswith('From '):
-        # Start of message found
-        print(line[:-1], end=' ')
-        while 1:
-            line = mail.readline()
-            if not line or line == '\n':
-                break
-            if line.startswith('Subject: '):
-                print(repr(line[9:-1]), end=' ')
-        print()
diff --git a/Demo/scripts/lpwatch.py b/Demo/scripts/lpwatch.py
deleted file mode 100755
index 01d9fea..0000000
--- a/Demo/scripts/lpwatch.py
+++ /dev/null
@@ -1,102 +0,0 @@
-#! /usr/bin/env python3
-
-# Watch line printer queue(s).
-# Intended for BSD 4.3 lpq.
-
-import os
-import sys
-import time
-
-DEF_PRINTER = 'psc'
-DEF_DELAY = 10
-
-def main():
-    delay = DEF_DELAY # XXX Use getopt() later
-    try:
-        thisuser = os.environ['LOGNAME']
-    except:
-        thisuser = os.environ['USER']
-    printers = sys.argv[1:]
-    if printers:
-        # Strip '-P' from printer names just in case
-        # the user specified it...
-        for i, name in enumerate(printers):
-            if name[:2] == '-P':
-                printers[i] = name[2:]
-    else:
-        if 'PRINTER' in os.environ:
-            printers = [os.environ['PRINTER']]
-        else:
-            printers = [DEF_PRINTER]
-
-    clearhome = os.popen('clear', 'r').read()
-
-    while True:
-        text = clearhome
-        for name in printers:
-            text += makestatus(name, thisuser) + '\n'
-        print(text)
-        time.sleep(delay)
-
-def makestatus(name, thisuser):
-    pipe = os.popen('lpq -P' + name + ' 2>&1', 'r')
-    lines = []
-    users = {}
-    aheadbytes = 0
-    aheadjobs = 0
-    userseen = False
-    totalbytes = 0
-    totaljobs = 0
-    for line in pipe:
-        fields = line.split()
-        n = len(fields)
-        if len(fields) >= 6 and fields[n-1] == 'bytes':
-            rank, user, job = fields[0:3]
-            files = fields[3:-2]
-            bytes = int(fields[n-2])
-            if user == thisuser:
-                userseen = True
-            elif not userseen:
-                aheadbytes += bytes
-                aheadjobs += 1
-            totalbytes += bytes
-            totaljobs += 1
-            ujobs, ubytes = users.get(user, (0, 0))
-            ujobs += 1
-            ubytes += bytes
-            users[user] = ujobs, ubytes
-        else:
-            if fields and fields[0] != 'Rank':
-                line = line.strip()
-                if line == 'no entries':
-                    line = name + ': idle'
-                elif line[-22:] == ' is ready and printing':
-                    line = name
-                lines.append(line)
-
-    if totaljobs:
-        line = '%d K' % ((totalbytes+1023) // 1024)
-        if totaljobs != len(users):
-            line += ' (%d jobs)' % totaljobs
-        if len(users) == 1:
-            line += ' for %s' % next(iter(users))
-        else:
-            line += ' for %d users' % len(users)
-            if userseen:
-                if aheadjobs == 0:
-                    line += ' (%s first)' % thisuser
-                else:
-                    line += ' (%d K before %s)' % (
-                        (aheadbytes+1023) // 1024, thisuser)
-        lines.append(line)
-
-    sts = pipe.close()
-    if sts:
-        lines.append('lpq exit status %r' % (sts,))
-    return ': '.join(lines)
-
-if __name__ == "__main__":
-    try:
-        main()
-    except KeyboardInterrupt:
-        pass
diff --git a/Demo/scripts/makedir.py b/Demo/scripts/makedir.py
deleted file mode 100755
index a14e848..0000000
--- a/Demo/scripts/makedir.py
+++ /dev/null
@@ -1,21 +0,0 @@
-#! /usr/bin/env python3
-
-# Like mkdir, but also make intermediate directories if necessary.
-# It is not an error if the given directory already exists (as long
-# as it is a directory).
-# Errors are not treated specially -- you just get a Python exception.
-
-import sys, os
-
-def main():
-    for p in sys.argv[1:]:
-        makedirs(p)
-
-def makedirs(p):
-    if p and not os.path.isdir(p):
-        head, tail = os.path.split(p)
-        makedirs(head)
-        os.mkdir(p, 0o777)
-
-if __name__ == "__main__":
-    main()
diff --git a/Demo/scripts/mboxconvert.py b/Demo/scripts/mboxconvert.py
deleted file mode 100755
index cb3ed89..0000000
--- a/Demo/scripts/mboxconvert.py
+++ /dev/null
@@ -1,124 +0,0 @@
-#! /usr/bin/env python3
-
-# Convert  MH directories (1 message per file) or MMDF mailboxes (4x^A
-# delimited) to unix mailbox (From ... delimited) on stdout.
-# If -f is given, files contain one message per file (e.g. MH messages)
-
-import rfc822
-import sys
-import time
-import os
-import stat
-import getopt
-import re
-
-def main():
-    dofile = mmdf
-    try:
-        opts, args = getopt.getopt(sys.argv[1:], 'f')
-    except getopt.error as msg:
-        sys.stderr.write('%s\n' % msg)
-        sys.exit(2)
-    for o, a in opts:
-        if o == '-f':
-            dofile = message
-    if not args:
-        args = ['-']
-    sts = 0
-    for arg in args:
-        if arg == '-' or arg == '':
-            sts = dofile(sys.stdin) or sts
-        elif os.path.isdir(arg):
-            sts = mh(arg) or sts
-        elif os.path.isfile(arg):
-            try:
-                f = open(arg)
-            except IOError as msg:
-                sys.stderr.write('%s: %s\n' % (arg, msg))
-                sts = 1
-                continue
-            sts = dofile(f) or sts
-            f.close()
-        else:
-            sys.stderr.write('%s: not found\n' % arg)
-            sts = 1
-    if sts:
-        sys.exit(sts)
-
-numeric = re.compile('[1-9][0-9]*')
-
-def mh(dir):
-    sts = 0
-    msgs = os.listdir(dir)
-    for msg in msgs:
-        if numeric.match(msg) != len(msg):
-            continue
-        fn = os.path.join(dir, msg)
-        try:
-            f = open(fn)
-        except IOError as msg:
-            sys.stderr.write('%s: %s\n' % (fn, msg))
-            sts = 1
-            continue
-        sts = message(f) or sts
-    return sts
-
-def mmdf(f):
-    sts = 0
-    while 1:
-        line = f.readline()
-        if not line:
-            break
-        if line == '\1\1\1\1\n':
-            sts = message(f, line) or sts
-        else:
-            sys.stderr.write(
-                    'Bad line in MMFD mailbox: %r\n' % (line,))
-    return sts
-
-counter = 0 # for generating unique Message-ID headers
-
-def message(f, delimiter = ''):
-    sts = 0
-    # Parse RFC822 header
-    m = rfc822.Message(f)
-    # Write unix header line
-    fullname, email = m.getaddr('From')
-    tt = m.getdate('Date')
-    if tt:
-        t = time.mktime(tt)
-    else:
-        sys.stderr.write(
-                'Unparseable date: %r\n' % (m.get('Date'),))
-        t = os.fstat(f.fileno())[stat.ST_MTIME]
-    print('From', email, time.ctime(t))
-    # Copy RFC822 header
-    for line in m.headers:
-        print(line, end=' ')
-    # Invent Message-ID header if none is present
-    if 'message-id' not in m:
-        global counter
-        counter = counter + 1
-        msgid = "<%s.%d>" % (hex(t), counter)
-        sys.stderr.write("Adding Message-ID %s (From %s)\n" %
-                         (msgid, email))
-        print("Message-ID:", msgid)
-    print()
-    # Copy body
-    while 1:
-        line = f.readline()
-        if line == delimiter:
-            break
-        if not line:
-            sys.stderr.write('Unexpected EOF in message\n')
-            sts = 1
-            break
-        if line[:5] == 'From ':
-            line = '>' + line
-        print(line, end=' ')
-    # Print trailing newline
-    print()
-    return sts
-
-if __name__ == "__main__":
-    main()
diff --git a/Demo/scripts/morse.py b/Demo/scripts/morse.py
deleted file mode 100755
index c2f408f..0000000
--- a/Demo/scripts/morse.py
+++ /dev/null
@@ -1,128 +0,0 @@
-#! /usr/bin/env python3
-
-# DAH should be three DOTs.
-# Space between DOTs and DAHs should be one DOT.
-# Space between two letters should be one DAH.
-# Space between two words should be DOT DAH DAH.
-
-import sys, math, aifc
-from contextlib import closing
-
-DOT = 30
-DAH = 3 * DOT
-OCTAVE = 2                              # 1 == 441 Hz, 2 == 882 Hz, ...
-
-morsetab = {
-        'A': '.-',              'a': '.-',
-        'B': '-...',            'b': '-...',
-        'C': '-.-.',            'c': '-.-.',
-        'D': '-..',             'd': '-..',
-        'E': '.',               'e': '.',
-        'F': '..-.',            'f': '..-.',
-        'G': '--.',             'g': '--.',
-        'H': '....',            'h': '....',
-        'I': '..',              'i': '..',
-        'J': '.---',            'j': '.---',
-        'K': '-.-',             'k': '-.-',
-        'L': '.-..',            'l': '.-..',
-        'M': '--',              'm': '--',
-        'N': '-.',              'n': '-.',
-        'O': '---',             'o': '---',
-        'P': '.--.',            'p': '.--.',
-        'Q': '--.-',            'q': '--.-',
-        'R': '.-.',             'r': '.-.',
-        'S': '...',             's': '...',
-        'T': '-',               't': '-',
-        'U': '..-',             'u': '..-',
-        'V': '...-',            'v': '...-',
-        'W': '.--',             'w': '.--',
-        'X': '-..-',            'x': '-..-',
-        'Y': '-.--',            'y': '-.--',
-        'Z': '--..',            'z': '--..',
-        '0': '-----',           ',': '--..--',
-        '1': '.----',           '.': '.-.-.-',
-        '2': '..---',           '?': '..--..',
-        '3': '...--',           ';': '-.-.-.',
-        '4': '....-',           ':': '---...',
-        '5': '.....',           "'": '.----.',
-        '6': '-....',           '-': '-....-',
-        '7': '--...',           '/': '-..-.',
-        '8': '---..',           '(': '-.--.-',
-        '9': '----.',           ')': '-.--.-',
-        ' ': ' ',               '_': '..--.-',
-}
-
-nowave = b'\0' * 200
-
-# If we play at 44.1 kHz (which we do), then if we produce one sine
-# wave in 100 samples, we get a tone of 441 Hz.  If we produce two
-# sine waves in these 100 samples, we get a tone of 882 Hz.  882 Hz
-# appears to be a nice one for playing morse code.
-def mkwave(octave):
-    sinewave = bytearray()
-    for i in range(100):
-        val = int(math.sin(math.pi * i * octave / 50.0) * 30000)
-        sinewave.extend([(val >> 8) & 255, val & 255])
-    return bytes(sinewave)
-
-defaultwave = mkwave(OCTAVE)
-
-def main():
-    import getopt
-    try:
-        opts, args = getopt.getopt(sys.argv[1:], 'o:p:')
-    except getopt.error:
-        sys.stderr.write('Usage ' + sys.argv[0] +
-                         ' [ -o outfile ] [ -p octave ] [ words ] ...\n')
-        sys.exit(1)
-    wave = defaultwave
-    outfile = 'morse.aifc'
-    for o, a in opts:
-        if o == '-o':
-            outfile = a
-        if o == '-p':
-            wave = mkwave(int(a))
-    with closing(aifc.open(outfile, 'w')) as fp:
-        fp.setframerate(44100)
-        fp.setsampwidth(2)
-        fp.setnchannels(1)
-        if args:
-            source = [' '.join(args)]
-        else:
-            source = iter(sys.stdin.readline, '')
-        for line in source:
-            mline = morse(line)
-            play(mline, fp, wave)
-
-# Convert a string to morse code with \001 between the characters in
-# the string.
-def morse(line):
-    res = ''
-    for c in line:
-        try:
-            res += morsetab[c] + '\001'
-        except KeyError:
-            pass
-    return res
-
-# Play a line of morse code.
-def play(line, fp, wave):
-    for c in line:
-        if c == '.':
-            sine(fp, DOT, wave)
-        elif c == '-':
-            sine(fp, DAH, wave)
-        else:                   # space
-            pause(fp, DAH + DOT)
-        pause(fp, DOT)
-
-def sine(fp, length, wave):
-    for i in range(length):
-        fp.writeframesraw(wave)
-
-def pause(fp, length):
-    for i in range(length):
-        fp.writeframesraw(nowave)
-
-if __name__ == '__main__':
-    main()
diff --git a/Demo/scripts/newslist.doc b/Demo/scripts/newslist.doc
deleted file mode 100755
index 87fd9ba..0000000
--- a/Demo/scripts/newslist.doc
+++ /dev/null
@@ -1,59 +0,0 @@
-                             NEWSLIST
-                             ========    
-            A program to assist HTTP browsing of newsgroups
-            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-WWW browsers such as NCSA Mosaic allow the user to read newsgroup
-articles by specifying the group name in a URL eg 'news:comp.answers'.
-
-To browse through many groups, though, (and there are several thousand
-of them) you really need a page or pages containing links to all the
-groups. There are some good ones out there, for example,
-
-    http://info.cern.ch/hypertext/DataSources/News/Groups/Overview.html
-
-is the standard one at CERN, but it only shows the groups available there,
-which may be rather different from those available on your machine.
-
-Newslist is a program which creates a hierarchy of pages for you based
-on the groups available from YOUR server. It is written in python - a
-splendid interpreted object-oriented language which I suggest you get
-right now from the directory /pub/python at ftp.cwi.nl, if you haven't
-already got it.
-
-You should be able to see some sample output by looking at:
-   http://pelican.cl.cam.ac.uk/newspage/root.html
-
-Descriptions of newsgroups can be added from a file with one group
-per line. eg:
-
-	alt.foo   Articles about foo
-	comp.bar  Programming in 'bar' and related languages
-
-A suitable list detailing most groups can be found at ftp.uu.net in
-/uunet-info/newsgroups.gz.
-
-Make sure you read the information at the beginning of the program source and
-configure the variables before running.
-
-In addition to python, you need:
-
-	An NNTP-based news feed.
-	A directory in which to put the pages.
-
-The programming is not very beautiful, but it works!  It comes with no
-warranty, express or implied, but with the hope that some others may
-find it useful.
-
-Comments, improvements & suggestions welcomed.
-Quentin Stafford-Fraser
-
- ----------------------------------------------------------------------
-                       Quentin Stafford-Fraser
-            http://pelican.cl.cam.ac.uk/people/qs101/me.html
- 
- Cambridge University Computer Lab        Rank Xerox Cambridge EuroPARC
- qs101@cl.cam.ac.uk                           fraser@europarc.xerox.com
- Tel: +44 223 334411                                Tel: +44 223 341521
- Fax: +44 223 334679                                Fax: +44 223 341510
- ----------------------------------------------------------------------
diff --git a/Demo/scripts/newslist.py b/Demo/scripts/newslist.py
deleted file mode 100755
index b345f2ef..0000000
--- a/Demo/scripts/newslist.py
+++ /dev/null
@@ -1,361 +0,0 @@
-#! /usr/bin/env python3
-#######################################################################
-# Newslist  $Revision$
-#
-# Syntax:
-#    newslist [ -a ]
-#
-# This is a program to create a directory full of HTML pages
-# which between them contain links to all the newsgroups available
-# on your server.
-#
-# The -a option causes a complete list of all groups to be read from
-# the server rather than just the ones which have appeared since last
-# execution. This recreates the local list from scratch. Use this on
-# the first invocation of the program, and from time to time thereafter.
-#   When new groups are first created they may appear on your server as
-# empty groups. By default, empty groups are ignored by the -a option.
-# However, these new groups will not be created again, and so will not
-# appear in the server's list of 'new groups' at a later date. Hence it
-# won't appear until you do a '-a' after some articles have appeared.
-#
-# I should really keep a list of ignored empty groups and re-check them
-# for articles on every run, but I haven't got around to it yet.
-#
-# This assumes an NNTP news feed.
-#
-# Feel free to copy, distribute and modify this code for
-# non-commercial use. If you make any useful modifications, let me
-# know!
-#
-# (c) Quentin Stafford-Fraser 1994
-# fraser@europarc.xerox.com                     qs101@cl.cam.ac.uk
-#                                                                     #
-#######################################################################
-import sys, nntplib, marshal, time, os
-
-#######################################################################
-# Check these variables before running!                               #
-
-# Top directory.
-# Filenames which don't start with / are taken as being relative to this.
-topdir = os.path.expanduser('~/newspage')
-
-# The name of your NNTP host
-# eg.
-#    newshost = 'nntp-serv.cl.cam.ac.uk'
-# or use following to get the name from the NNTPSERVER environment
-# variable:
-#    newshost = os.environ['NNTPSERVER']
-newshost = 'news.example.com'
-
-# The filename for a local cache of the newsgroup list
-treefile = 'grouptree'
-
-# The filename for descriptions of newsgroups
-# I found a suitable one at ftp.uu.net in /uunet-info/newgroups.gz
-# You can set this to '' if you don't wish to use one.
-descfile = 'newsgroups'
-
-# The directory in which HTML pages should be created
-# eg.
-#   pagedir  = '/usr/local/lib/html/newspage'
-#   pagedir  = 'pages'
-pagedir  = topdir
-
-# The html prefix which will refer to this directory
-# eg.
-#   httppref = '/newspage/',
-# or leave blank for relative links between pages: (Recommended)
-#   httppref = ''
-httppref = ''
-
-# The name of the 'root' news page in this directory.
-# A .html suffix will be added.
-rootpage = 'root'
-
-# Set skipempty to 0 if you wish to see links to empty groups as well.
-# Only affects the -a option.
-skipempty = 1
-
-# pagelinkicon can contain html to put an icon after links to
-# further pages. This helps to make important links stand out.
-# Set to '' if not wanted, or '...' is quite a good one.
-pagelinkicon = '... <img src="http://pelican.cl.cam.ac.uk/icons/page.xbm"> '
-
-# ---------------------------------------------------------------------
-# Less important personal preferences:
-
-# Sublistsize controls the maximum number of items the will appear as
-# an indented sub-list before the whole thing is moved onto a different
-# page. The smaller this is, the more pages you will have, but the
-# shorter each will be.
-sublistsize = 4
-
-# That should be all.                                                 #
-#######################################################################
-
-for dir in os.curdir, os.environ['HOME']:
-    rcfile = os.path.join(dir, '.newslistrc.py')
-    if os.path.exists(rcfile):
-        print(rcfile)
-        exec(open(rcfile).read())
-        break
-
-from nntplib import NNTP
-from stat import *
-
-rcsrev = '$Revision$'
-rcsrev = ' '.join([s for s in rcsrev.split() if '$' not in s])
-desc = {}
-
-# Make (possibly) relative filenames into absolute ones
-treefile = os.path.join(topdir,treefile)
-descfile = os.path.join(topdir,descfile)
-page = os.path.join(topdir,pagedir)
-
-# First the bits for creating trees ---------------------------
-
-# Addtotree creates/augments a tree from a list of group names
-def addtotree(tree, groups):
-    print('Updating tree...')
-    for i in groups:
-        parts = i.split('.')
-        makeleaf(tree, parts)
-
-# Makeleaf makes a leaf and the branch leading to it if necessary
-def makeleaf(tree,path):
-    j = path[0]
-    l = len(path)
-
-    if j not in tree:
-        tree[j] = {}
-    if l == 1:
-        tree[j]['.'] = '.'
-    if l > 1:
-        makeleaf(tree[j],path[1:])
-
-# Then the bits for outputting trees as pages ----------------
-
-# Createpage creates an HTML file named <root>.html containing links
-# to those groups beginning with <root>.
-
-def createpage(root, tree, p):
-    filename = os.path.join(pagedir, root+'.html')
-    if root == rootpage:
-        detail = ''
-    else:
-        detail = ' under ' + root
-    with open(filename, 'w') as f:
-        # f.write('Content-Type: text/html\n')
-        f.write('<html>\n<head>\n')
-        f.write('<title>Newsgroups available%s</title>\n' % detail)
-        f.write('</head>\n<body>\n')
-        f.write('<h1>Newsgroups available%s</h1>\n' % detail)
-        f.write('<a href="%s%s.html">Back to top level</a><p>\n' %
-                (httppref, rootpage))
-        printtree(f, tree, 0, p)
-        f.write('\n<p>')
-        f.write("<i>This page automatically created by 'newslist' v. %s." %
-                rcsrev)
-        f.write(time.ctime(time.time()) + '</i>\n')
-        f.write('</body>\n</html>\n')
-
-# Printtree prints the groups as a bulleted list.  Groups with
-# more than <sublistsize> subgroups will be put on a separate page.
-# Other sets of subgroups are just indented.
-
-def printtree(f, tree, indent, p):
-    l = len(tree)
-
-    if l > sublistsize and indent > 0:
-        # Create a new page and a link to it
-        f.write('<li><b><a href="%s%s.html">' % (httppref, p[1:]))
-        f.write(p[1:] + '.*')
-        f.write('</a></b>%s\n' % pagelinkicon)
-        createpage(p[1:], tree, p)
-        return
-
-    kl = sorted(tree.keys())
-
-    if l > 1:
-        if indent > 0:
-            # Create a sub-list
-            f.write('<li>%s\n<ul>' % p[1:])
-        else:
-            # Create a main list
-            f.write('<ul>')
-        indent = indent + 1
-
-    for i in kl:
-        if i == '.':
-            # Output a newsgroup
-            f.write('<li><a href="news:%s">%s</a> ' % (p[1:], p[1:]))
-            if p[1:] in desc:
-                f.write('     <i>%s</i>\n' % desc[p[1:]])
-            else:
-                f.write('\n')
-        else:
-            # Output a hierarchy
-            printtree(f, tree[i], indent, p+'.'+i)
-
-    if l > 1:
-        f.write('\n</ul>')
-
-# Reading descriptions file ---------------------------------------
-
-# This returns a dict mapping group name to its description
-
-def readdesc(descfile):
-    global desc
-    desc = {}
-
-    if descfile == '':
-        return
-
-    try:
-        with open(descfile, 'r') as d:
-            print('Reading descriptions...')
-            for l in d:
-                bits = l.split()
-                try:
-                    grp = bits[0]
-                    dsc = ' '.join(bits[1:])
-                    if len(dsc) > 1:
-                        desc[grp] = dsc
-                except IndexError:
-                    pass
-    except IOError:
-        print('Failed to open description file ' + descfile)
-        return
-
-# Check that ouput directory exists, ------------------------------
-# and offer to create it if not
-
-def checkopdir(pagedir):
-    if not os.path.isdir(pagedir):
-        print('Directory %s does not exist.' % pagedir)
-        print('Shall I create it for you? (y/n)')
-        if sys.stdin.readline()[0] == 'y':
-            try:
-                os.mkdir(pagedir, 0o777)
-            except:
-                print('Sorry - failed!')
-                sys.exit(1)
-        else:
-            print('OK. Exiting.')
-            sys.exit(1)
-
-# Read and write current local tree ----------------------------------
-
-def readlocallist(treefile):
-    print('Reading current local group list...')
-    tree = {}
-    try:
-        treetime = time.localtime(os.stat(treefile)[ST_MTIME])
-    except:
-        print('\n*** Failed to open local group cache '+treefile)
-        print('If this is the first time you have run newslist, then')
-        print('use the -a option to create it.')
-        sys.exit(1)
-    treedate = '%02d%02d%02d' % (treetime[0] % 100, treetime[1], treetime[2])
-    try:
-        with open(treefile, 'rb') as dump:
-            tree = marshal.load(dump)
-    except IOError:
-        print('Cannot open local group list ' + treefile)
-    return (tree, treedate)
-
-def writelocallist(treefile, tree):
-    try:
-        with open(treefile, 'wb') as dump:
-            groups = marshal.dump(tree, dump)
-        print('Saved list to %s\n' % treefile)
-    except:
-        print('Sorry - failed to write to local group cache', treefile)
-        print('Does it (or its directory) have the correct permissions?')
-        sys.exit(1)
-
-# Return list of all groups on server -----------------------------
-
-def getallgroups(server):
-    print('Getting list of all groups...')
-    treedate = '010101'
-    info = server.list()[1]
-    groups = []
-    print('Processing...')
-    if skipempty:
-        print('\nIgnoring following empty groups:')
-    for i in info:
-        grpname = i[0].split()[0]
-        if skipempty and int(i[1]) < int(i[2]):
-            print(grpname.decode() + ' ', end=' ')
-        else:
-            groups.append(grpname.decode())
-    print('\n')
-    if skipempty:
-        print('(End of empty groups)')
-    return groups
-
-# Return list of new groups on server -----------------------------
-
-def getnewgroups(server, treedate):
-    print('Getting list of new groups since start of %s...' % treedate, end=' ')
-    info = server.newgroups(treedate, '000001')[1]
-    print('got %d.' % len(info))
-    print('Processing...', end=' ')
-    groups = []
-    for i in info:
-        grpname = i.split()[0]
-        groups.append(grpname.decode())
-    print('Done')
-    return groups
-
-# Now the main program --------------------------------------------
-
-def main():
-    tree = {}
-
-    # Check that the output directory exists
-    checkopdir(pagedir)
-
-    try:
-        print('Connecting to %s...' % newshost)
-        if sys.version[0] == '0':
-            s = NNTP.init(newshost)
-        else:
-            s = NNTP(newshost)
-        connected = True
-    except (nntplib.error_temp, nntplib.error_perm) as x:
-        print('Error connecting to host:', x)
-        print('I\'ll try to use just the local list.')
-        connected = False
-
-    # If -a is specified, read the full list of groups from server
-    if connected and len(sys.argv) > 1 and sys.argv[1] == '-a':
-        groups = getallgroups(s)
-
-    # Otherwise just read the local file and then add
-    # groups created since local file last modified.
-    else:
-
-        (tree, treedate) = readlocallist(treefile)
-        if connected:
-            groups = getnewgroups(s, treedate)
-
-    if connected:
-        addtotree(tree, groups)
-        writelocallist(treefile,tree)
-
-    # Read group descriptions
-    readdesc(descfile)
-
-    print('Creating pages...')
-    createpage(rootpage, tree, '')
-    print('Done')
-
-if __name__ == "__main__":
-    main()
-
-# That's all folks
-######################################################################
diff --git a/Demo/scripts/pi.py b/Demo/scripts/pi.py
deleted file mode 100755
index 248f81f..0000000
--- a/Demo/scripts/pi.py
+++ /dev/null
@@ -1,33 +0,0 @@
-#! /usr/bin/env python3
-
-# Print digits of pi forever.
-#
-# The algorithm, using Python's 'long' integers ("bignums"), works
-# with continued fractions, and was conceived by Lambert Meertens.
-#
-# See also the ABC Programmer's Handbook, by Geurts, Meertens & Pemberton,
-# published by Prentice-Hall (UK) Ltd., 1990.
-
-import sys
-
-def main():
-    k, a, b, a1, b1 = 2, 4, 1, 12, 4
-    while True:
-        # Next approximation
-        p, q, k = k*k, 2*k+1, k+1
-        a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
-        # Print common digits
-        d, d1 = a//b, a1//b1
-        while d == d1:
-            output(d)
-            a, a1 = 10*(a%b), 10*(a1%b1)
-            d, d1 = a//b, a1//b1
-
-def output(d):
-    # Use write() to avoid spaces between the digits
-    sys.stdout.write(str(d))
-    # Flush so the output is seen immediately
-    sys.stdout.flush()
-
-if __name__ == "__main__":
-    main()
diff --git a/Demo/scripts/pp.py b/Demo/scripts/pp.py
deleted file mode 100755
index 87b9d8f..0000000
--- a/Demo/scripts/pp.py
+++ /dev/null
@@ -1,125 +0,0 @@
-#! /usr/bin/env python3
-
-# Emulate some Perl command line options.
-# Usage: pp [-a] [-c] [-d] [-e scriptline] [-F fieldsep] [-n] [-p] [file] ...
-# Where the options mean the following:
-#   -a            : together with -n or -p, splits each line into list F
-#   -c            : check syntax only, do not execute any code
-#   -d            : run the script under the debugger, pdb
-#   -e scriptline : gives one line of the Python script; may be repeated
-#   -F fieldsep   : sets the field separator for the -a option [not in Perl]
-#   -n            : runs the script for each line of input
-#   -p            : prints the line after the script has run
-# When no script lines have been passed, the first file argument
-# contains the script.  With -n or -p, the remaining arguments are
-# read as input to the script, line by line.  If a file is '-'
-# or missing, standard input is read.
-
-# XXX To do:
-# - add -i extension option (change files in place)
-# - make a single loop over the files and lines (changes effect of 'break')?
-# - add an option to specify the record separator
-# - except for -n/-p, run directly from the file if at all possible
-
-import sys
-import getopt
-
-FS = ''
-SCRIPT = []
-AFLAG = 0
-CFLAG = 0
-DFLAG = 0
-NFLAG = 0
-PFLAG = 0
-
-try:
-    optlist, ARGS = getopt.getopt(sys.argv[1:], 'acde:F:np')
-except getopt.error as msg:
-    sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
-    sys.exit(2)
-
-for option, optarg in optlist:
-    if option == '-a':
-        AFLAG = 1
-    elif option == '-c':
-        CFLAG = 1
-    elif option == '-d':
-        DFLAG = 1
-    elif option == '-e':
-        for line in optarg.split('\n'):
-            SCRIPT.append(line)
-    elif option == '-F':
-        FS = optarg
-    elif option == '-n':
-        NFLAG = 1
-        PFLAG = 0
-    elif option == '-p':
-        NFLAG = 1
-        PFLAG = 1
-    else:
-        print(option, 'not recognized???')
-
-if not ARGS: ARGS.append('-')
-
-if not SCRIPT:
-    if ARGS[0] == '-':
-        fp = sys.stdin
-    else:
-        fp = open(ARGS[0], 'r')
-    while 1:
-        line = fp.readline()
-        if not line: break
-        SCRIPT.append(line[:-1])
-    del fp
-    del ARGS[0]
-    if not ARGS: ARGS.append('-')
-
-if CFLAG:
-    prologue = ['if 0:']
-    epilogue = []
-elif NFLAG:
-    # Note that it is on purpose that AFLAG and PFLAG are
-    # tested dynamically each time through the loop
-    prologue = [
-            'LINECOUNT = 0',
-            'for FILE in ARGS:',
-            '   \tif FILE == \'-\':',
-            '   \t   \tFP = sys.stdin',
-            '   \telse:',
-            '   \t   \tFP = open(FILE, \'r\')',
-            '   \tLINENO = 0',
-            '   \twhile 1:',
-            '   \t   \tLINE = FP.readline()',
-            '   \t   \tif not LINE: break',
-            '   \t   \tLINENO = LINENO + 1',
-            '   \t   \tLINECOUNT = LINECOUNT + 1',
-            '   \t   \tL = LINE[:-1]',
-            '   \t   \taflag = AFLAG',
-            '   \t   \tif aflag:',
-            '   \t   \t   \tif FS: F = L.split(FS)',
-            '   \t   \t   \telse: F = L.split()'
-            ]
-    epilogue = [
-            '   \t   \tif not PFLAG: continue',
-            '   \t   \tif aflag:',
-            '   \t   \t   \tif FS: print(FS.join(F))',
-            '   \t   \t   \telse: print(\' \'.join(F))',
-            '   \t   \telse: print(L)',
-            ]
-else:
-    prologue = ['if 1:']
-    epilogue = []
-
-# Note that we indent using tabs only, so that any indentation style
-# used in 'command' will come out right after re-indentation.
-
-program = '\n'.join(prologue) + '\n'
-for line in SCRIPT:
-    program += '   \t   \t' + line + '\n'
-program += '\n'.join(epilogue) + '\n'
-
-if DFLAG:
-    import pdb
-    pdb.run(program)
-else:
-    exec(program)
diff --git a/Demo/scripts/primes.py b/Demo/scripts/primes.py
deleted file mode 100755
index c994623..0000000
--- a/Demo/scripts/primes.py
+++ /dev/null
@@ -1,31 +0,0 @@
-#! /usr/bin/env python3
-
-# Print prime numbers in a given range
-
-def primes(min, max):
-    if max >= 2 >= min:
-        print(2)
-    primes = [2]
-    i = 3
-    while i <= max:
-        for p in primes:
-            if i % p == 0 or p*p > i:
-                break
-        if i % p != 0:
-            primes.append(i)
-            if i >= min:
-                print(i)
-        i += 2
-
-def main():
-    import sys
-    min, max = 2, 0x7fffffff
-    if sys.argv[1:]:
-        min = int(sys.argv[1])
-        if sys.argv[2:]:
-            max = int(sys.argv[2])
-    primes(min, max)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/Demo/scripts/script.py b/Demo/scripts/script.py
deleted file mode 100755
index a815a35..0000000
--- a/Demo/scripts/script.py
+++ /dev/null
@@ -1,42 +0,0 @@
-#! /usr/bin/env python3
-
-# script.py -- Make typescript of terminal session.
-# Usage:
-#       -a      Append to typescript.
-#       -p      Use Python as shell.
-# Author: Steen Lumholt.
-
-
-import os, time, sys, getopt
-import pty
-
-def read(fd):
-    data = os.read(fd, 1024)
-    script.write(data)
-    return data
-
-shell = 'sh'
-filename = 'typescript'
-mode = 'wb'
-if 'SHELL' in os.environ:
-    shell = os.environ['SHELL']
-
-try:
-    opts, args = getopt.getopt(sys.argv[1:], 'ap')
-except getopt.error as msg:
-    print('%s: %s' % (sys.argv[0], msg))
-    sys.exit(2)
-
-for o, a in opts:
-    if o == '-a':
-        mode = 'ab'
-    elif o == '-p':
-        shell = 'python'
-
-script = open(filename, mode)
-
-sys.stdout.write('Script started, file is %s\n' % filename)
-script.write(('Script started on %s\n' % time.ctime(time.time())).encode())
-pty.spawn(shell, read)
-script.write(('Script done on %s\n' % time.ctime(time.time())).encode())
-sys.stdout.write('Script done, file is %s\n' % filename)
diff --git a/Demo/scripts/update.py b/Demo/scripts/update.py
deleted file mode 100755
index 49c09d8..0000000
--- a/Demo/scripts/update.py
+++ /dev/null
@@ -1,92 +0,0 @@
-#! /usr/bin/env python3
-
-# Update a bunch of files according to a script.
-# The input file contains lines of the form <filename>:<lineno>:<text>,
-# meaning that the given line of the given file is to be replaced
-# by the given text.  This is useful for performing global substitutions
-# on grep output:
-
-import os
-import sys
-import re
-
-pat = '^([^: \t\n]+):([1-9][0-9]*):'
-prog = re.compile(pat)
-
-class FileObj:
-    def __init__(self, filename):
-        self.filename = filename
-        self.changed = 0
-        try:
-            self.lines = open(filename, 'r').readlines()
-        except IOError as msg:
-            print('*** Can\'t open "%s":' % filename, msg)
-            self.lines = None
-            return
-        print('diffing', self.filename)
-
-    def finish(self):
-        if not self.changed:
-            print('no changes to', self.filename)
-            return
-        try:
-            os.rename(self.filename, self.filename + '~')
-            fp = open(self.filename, 'w')
-        except (os.error, IOError) as msg:
-            print('*** Can\'t rewrite "%s":' % self.filename, msg)
-            return
-        print('writing', self.filename)
-        for line in self.lines:
-            fp.write(line)
-        fp.close()
-        self.changed = 0
-
-    def process(self, lineno, rest):
-        if self.lines is None:
-            print('(not processed): %s:%s:%s' % (
-                      self.filename, lineno, rest), end=' ')
-            return
-        i = eval(lineno) - 1
-        if not 0 <= i < len(self.lines):
-            print('*** Line number out of range: %s:%s:%s' % (
-                      self.filename, lineno, rest), end=' ')
-            return
-        if self.lines[i] == rest:
-            print('(no change): %s:%s:%s' % (
-                      self.filename, lineno, rest), end=' ')
-            return
-        if not self.changed:
-            self.changed = 1
-        print('%sc%s' % (lineno, lineno))
-        print('<', self.lines[i], end=' ')
-        print('---')
-        self.lines[i] = rest
-        print('>', self.lines[i], end=' ')
-
-def main():
-    if sys.argv[1:]:
-        try:
-            fp = open(sys.argv[1], 'r')
-        except IOError as msg:
-            print('Can\'t open "%s":' % sys.argv[1], msg)
-            sys.exit(1)
-    else:
-        fp = sys.stdin
-    curfile = None
-    while 1:
-        line = fp.readline()
-        if not line:
-            if curfile: curfile.finish()
-            break
-        n = prog.match(line)
-        if n < 0:
-            print('Funny line:', line, end=' ')
-            continue
-        filename, lineno = prog.group(1, 2)
-        if not curfile or filename != curfile.filename:
-            if curfile: curfile.finish()
-            curfile = FileObj(filename)
-        curfile.process(lineno, line[n:])
-
-if __name__ == "__main__":
-    main()