这可以做到：
""" Strip comments and docstrings from a file.
"""
import sys, token, tokenize
def do_file(fname):
""" Run on just one file.
"""
source = open(fname)
mod = open(fname + ",strip", "w")
prev_toktype = token.INDENT
first_line = None
last_lineno = -1
last_col = 0
tokgen = tokenize.generate_tokens(source.readline)
for toktype, ttext, (slineno, scol), (elineno, ecol), ltext in tokgen:
if 0: # Change to if 1 to see the tokens fly by.
print("%10s %-14s %-20r %r" % (
tokenize.tok_name.get(toktype, toktype),
"%d.%d-%d.%d" % (slineno, scol, elineno, ecol),
ttext, ltext
))
if slineno > last_lineno:
last_col = 0
if scol > last_col:
mod.write(" " * (scol - last_col))
if toktype == token.STRING and prev_toktype == token.INDENT:
# Docstring
mod.write("#--")
elif toktype == tokenize.COMMENT:
# Comment
mod.write("##\n")
else:
mod.write(ttext)
prev_toktype = toktype
last_col = ecol
last_lineno = elineno
if __name__ == '__main__':
do_file(sys.argv[1])
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