FM / scripts

/usr/lib64/python2.6/Demo/scripts

Name	Size	Mode	Actions
beer.py	426	0644	edit dl rm
beer.pyc	712	0644	edit dl rm
beer.pyo	712	0644	edit dl rm
eqfix.py	6314	0755	edit dl rm
eqfix.pyc	4720	0644	edit dl rm
eqfix.pyo	4720	0644	edit dl rm
fact.py	1112	0755	edit dl rm
fact.pyc	1126	0644	edit dl rm
fact.pyo	1126	0644	edit dl rm
find-uname.py	1209	0644	edit dl rm
find-uname.pyc	1546	0644	edit dl rm
find-uname.pyo	1546	0644	edit dl rm
from.py	877	0755	edit dl rm
from.pyc	762	0644	edit dl rm
from.pyo	762	0644	edit dl rm
ftpstats.py	4580	0755	edit dl rm
ftpstats.pyc	3962	0644	edit dl rm
ftpstats.pyo	3962	0644	edit dl rm
lpwatch.py	3203	0755	edit dl rm
lpwatch.pyc	2741	0644	edit dl rm
lpwatch.pyo	2741	0644	edit dl rm
makedir.py	513	0755	edit dl rm
makedir.pyc	739	0644	edit dl rm
makedir.pyo	739	0644	edit dl rm
markov.py	3749	0755	edit dl rm
markov.pyc	4391	0644	edit dl rm
markov.pyo	4391	0644	edit dl rm
mboxconvert.py	3192	0755	edit dl rm
mboxconvert.pyc	3301	0644	edit dl rm
mboxconvert.pyo	3301	0644	edit dl rm
mkrcs.py	1822	0755	edit dl rm
mkrcs.pyc	1519	0644	edit dl rm
mkrcs.pyo	1519	0644	edit dl rm
morse.py	4333	0644	edit dl rm
morse.pyc	4497	0644	edit dl rm
morse.pyo	4497	0644	edit dl rm
newslist.doc	2418	0755	edit dl rm
newslist.py	11363	0755	edit dl rm
newslist.pyc	7920	0644	edit dl rm
newslist.pyo	7920	0644	edit dl rm
pi.py	931	0755	edit dl rm
pi.pyc	931	0644	edit dl rm
pi.pyo	931	0644	edit dl rm
pp.py	3971	0755	edit dl rm
pp.pyc	2444	0644	edit dl rm
pp.pyo	2444	0644	edit dl rm
primes.py	568	0755	edit dl rm
primes.pyc	947	0644	edit dl rm
primes.pyo	947	0644	edit dl rm
queens.py	2241	0755	edit dl rm
queens.pyc	3046	0644	edit dl rm
queens.pyo	3046	0644	edit dl rm
README	1043	0644	edit dl rm
script.py	786	0755	edit dl rm
script.pyc	1003	0644	edit dl rm
script.pyo	1003	0644	edit dl rm
unbirthday.py	3319	0755	edit dl rm
unbirthday.pyc	3042	0644	edit dl rm
unbirthday.pyo	3042	0644	edit dl rm
update.py	2753	0755	edit dl rm
update.pyc	2792	0644	edit dl rm
update.pyo	2792	0644	edit dl rm
wh.py	91	0644	edit dl rm
wh.pyc	153	0644	edit dl rm
wh.pyo	153	0644	edit dl rm

Edit: /usr/lib64/python2.6/Demo/scripts/eqfix.py (6314B)

#! /usr/bin/env python2.6

# 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, 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, 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, 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] & 07777)
    except os.error, 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, 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, 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,
            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 match.has_key(token):
            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,
    return line

if __name__ == "__main__":
    main()

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