golden hour

/lib64/python2.7/Demo/scripts

File/Folder	Size	Actions
README	1009 B
beer.py	459 B
beer.pyc	703 B
beer.pyo	703 B
eqfix.py	6.16 KB
eqfix.pyc	4.52 KB
eqfix.pyo	4.52 KB
fact.py	1.11 KB
fact.pyc	1.14 KB
fact.pyo	1.14 KB
find-uname.py	1.18 KB
find-uname.pyc	1.47 KB
find-uname.pyo	1.47 KB
from.py	874 B
from.pyc	749 B
from.pyo	749 B
lpwatch.py	2.77 KB
lpwatch.pyc	2.54 KB
lpwatch.pyo	2.54 KB
makedir.py	510 B
makedir.pyc	732 B
makedir.pyo	732 B
markov.py	3.51 KB
markov.pyc	3.93 KB
markov.pyo	3.93 KB
mboxconvert.py	3.11 KB
mboxconvert.pyc	3.17 KB
mboxconvert.pyo	3.17 KB
morse.py	4.21 KB
morse.pyc	4.33 KB
morse.pyo	4.33 KB
newslist.doc	2.36 KB
newslist.py	11.17 KB
newslist.pyc	7.55 KB
newslist.pyo	7.55 KB
pi.py	888 B
pi.pyc	921 B
pi.pyo	921 B
pp.py	3.73 KB
pp.pyc	2.28 KB
pp.pyo	2.28 KB
primes.py	603 B
primes.pyc	921 B
primes.pyo	921 B
queens.py	2.19 KB
queens.pyc	2.95 KB
queens.pyo	2.95 KB
script.py	962 B
script.pyc	1.21 KB
script.pyo	1.21 KB
unbirthday.py	3.07 KB
unbirthday.pyc	2.93 KB
unbirthday.pyo	2.93 KB
update.py	2.69 KB
update.pyc	2.69 KB
update.pyo	2.69 KB

Edit: eqfix.py

#! /usr/bin/env python

# 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()