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"""Stuff that isn't in some old versions of Python"""
import sys
import os
import shutil
__all__ = ['any', 'WindowsError', 'md5', 'copytree']
try:
WindowsError = WindowsError
except NameError:
WindowsError = None
try:
from hashlib import md5
except ImportError:
import md5 as md5_module
md5 = md5_module.new
try:
from pkgutil import walk_packages
except ImportError:
# let's fall back as long as we can
from _pkgutil import walk_packages
try:
any = any
except NameError:
def any(seq):
for item in seq:
if item:
return True
return False
def copytree(src, dst):
if sys.version_info < (2, 5):
before_last_dir = os.path.dirname(dst)
if not os.path.exists(before_last_dir):
os.makedirs(before_last_dir)
shutil.copytree(src, dst)
shutil.copymode(src, dst)
else:
shutil.copytree(src, dst)
def product(*args, **kwds):
# product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy
# product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111
pools = map(tuple, args) * kwds.get('repeat', 1)
result = [[]]
for pool in pools:
result = [x+[y] for x in result for y in pool]
for prod in result:
yield tuple(prod)
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