diff options
Diffstat (limited to 'Lib/shlex.py')
-rw-r--r-- | Lib/shlex.py | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Lib/shlex.py b/Lib/shlex.py index b302699..ccf9038 100644 --- a/Lib/shlex.py +++ b/Lib/shlex.py @@ -9,6 +9,7 @@ import os.path import sys +from collections import deque try: from cStringIO import StringIO @@ -45,11 +46,11 @@ class shlex: self.escape = '\\' self.escapedquotes = '"' self.state = ' ' - self.pushback = [] + self.pushback = deque() self.lineno = 1 self.debug = 0 self.token = '' - self.filestack = [] + self.filestack = deque() self.source = None if self.debug: print 'shlex: reading from %s, line %d' \ @@ -59,13 +60,13 @@ class shlex: "Push a token onto the stack popped by the get_token method" if self.debug >= 1: print "shlex: pushing token " + `tok` - self.pushback.insert(0, tok) + self.pushback.appendleft(tok) def push_source(self, newstream, newfile=None): "Push an input source onto the lexer's input source stack." if isinstance(newstream, basestring): newstream = StringIO(newstream) - self.filestack.insert(0, (self.infile, self.instream, self.lineno)) + self.filestack.appendleft((self.infile, self.instream, self.lineno)) self.infile = newfile self.instream = newstream self.lineno = 1 @@ -78,8 +79,7 @@ class shlex: def pop_source(self): "Pop the input source stack." self.instream.close() - (self.infile, self.instream, self.lineno) = self.filestack[0] - self.filestack = self.filestack[1:] + (self.infile, self.instream, self.lineno) = self.filestack.popleft() if self.debug: print 'shlex: popping to %s, line %d' \ % (self.instream, self.lineno) @@ -88,7 +88,7 @@ class shlex: def get_token(self): "Get a token from the input stream (or from stack if it's nonempty)" if self.pushback: - tok = self.pushback.pop(0) + tok = self.pushback.popleft() if self.debug >= 1: print "shlex: popping token " + `tok` return tok @@ -226,7 +226,7 @@ class shlex: or self.whitespace_split: self.token = self.token + nextchar else: - self.pushback.insert(0, nextchar) + self.pushback.appendleft(nextchar) if self.debug >= 2: print "shlex: I see punctuation in word state" self.state = ' ' |