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| -rwxr-xr-x | Demo/scripts/pp.py | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Demo/scripts/pp.py b/Demo/scripts/pp.py new file mode 100755 index 0000000..c3be091 --- /dev/null +++ b/Demo/scripts/pp.py @@ -0,0 +1,48 @@ +#! /usr/local/python + +# Wrapper around Python to emulate the Perl -ae options: +# (1) first argument is a Python command +# (2) rest of arguments are input to the command in an implied loop +# (3) each line is put into the string L with trailing '\n' stripped +# (4) the fields of the line are put in the list F +# (5) also: FILE: full filename; LINE: full line; FP: open file object +# The command line option "-f FS" sets the field separator; +# this is available to the program as FS. + +import sys +import string +import getopt + +FS = '' + +optlist, args = getopt.getopt(sys.argv[1:], 'f:') +for option, optarg in optlist: + if option == '-f': FS = optarg + +command = args[0] + +if not args[1:]: args.append('-') + +prologue = [ \ + 'for FILE in args[1:]:', \ + '\tif FILE == \'-\':', \ + '\t\tFP = sys.stdin', \ + '\telse:', \ + '\t\tFP = open(FILE, \'r\')', \ + '\twhile 1:', \ + '\t\tLINE = FP.readline()', \ + '\t\tif not LINE: break', \ + '\t\tL = LINE[:-1]', \ + '\t\tif FS: F = string.splitfields(L, FS)', \ + '\t\telse: F = string.split(L)' \ + ] + +# Note that we indent using tabs only, so that any indentation style +# used in 'command' will come out right after re-indentation. + +program = string.joinfields(prologue, '\n') +for line in string.splitfields(command, '\n'): + program = program + ('\n\t\t' + line) +program = program + '\n' + +exec(program) |