FM / scripts

/usr/lib64/python2.7/Demo/scripts

Name	Size	Mode	Actions
beer.py	458	0755	edit dl rm
beer.pyc	703	0644	edit dl rm
beer.pyo	703	0644	edit dl rm
eqfix.py	6310	0755	edit dl rm
eqfix.pyc	4634	0644	edit dl rm
eqfix.pyo	4634	0644	edit dl rm
fact.py	1132	0755	edit dl rm
fact.pyc	1167	0644	edit dl rm
fact.pyo	1167	0644	edit dl rm
find-uname.py	1207	0755	edit dl rm
find-uname.pyc	1510	0644	edit dl rm
find-uname.pyo	1510	0644	edit dl rm
from.py	873	0755	edit dl rm
from.pyc	751	0644	edit dl rm
from.pyo	751	0644	edit dl rm
lpwatch.py	2837	0755	edit dl rm
lpwatch.pyc	2605	0644	edit dl rm
lpwatch.pyo	2605	0644	edit dl rm
makedir.py	509	0755	edit dl rm
makedir.pyc	732	0644	edit dl rm
makedir.pyo	732	0644	edit dl rm
markov.py	3589	0755	edit dl rm
markov.pyc	4025	0644	edit dl rm
markov.pyo	4025	0644	edit dl rm
mboxconvert.py	3188	0755	edit dl rm
mboxconvert.pyc	3253	0644	edit dl rm
mboxconvert.pyo	3253	0644	edit dl rm
morse.py	4314	0755	edit dl rm
morse.pyc	4431	0644	edit dl rm
morse.pyo	4431	0644	edit dl rm
pi.py	887	0755	edit dl rm
pi.pyc	921	0644	edit dl rm
pi.pyo	921	0644	edit dl rm
pp.py	3814	0755	edit dl rm
pp.pyc	2334	0644	edit dl rm
pp.pyo	2334	0644	edit dl rm
primes.py	602	0755	edit dl rm
primes.pyc	921	0644	edit dl rm
primes.pyo	921	0644	edit dl rm
queens.py	2238	0755	edit dl rm
queens.pyc	3024	0644	edit dl rm
queens.pyo	3024	0644	edit dl rm
README	1009	0644	edit dl rm
script.py	961	0755	edit dl rm
script.pyc	1235	0644	edit dl rm
script.pyo	1235	0644	edit dl rm
unbirthday.py	3139	0755	edit dl rm
unbirthday.pyc	3002	0644	edit dl rm
unbirthday.pyo	3002	0644	edit dl rm
update.py	2749	0755	edit dl rm
update.pyc	2759	0644	edit dl rm
update.pyo	2759	0644	edit dl rm

Edit: /usr/lib64/python2.7/Demo/scripts/eqfix.py (6310B)

#! /usr/bin/python2.7

# 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()

cmd: