#
#
-# Copyright (C) 2010 Google Inc.
+# Copyright (C) 2010, 2011 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
"""
import itertools
+import operator
try:
+ # pylint: disable=F0401
import functools
except ImportError:
functools = None
try:
+ # pylint: disable=F0401
import roman
except ImportError:
roman = None
-def all(seq, pred=bool): # pylint: disable-msg=W0622
- """Returns True if pred(x) is True for every element in the iterable.
+# compat.md5_hash and compat.sha1_hash can be called to generate and md5 and a
+# sha1 hashing modules, under python 2.4, 2.5 and 2.6, even though some changes
+# went on. compat.sha1 is python-version specific and is used for python
+# modules (hmac, for example) which have changed their behavior as well from
+# one version to the other.
+try:
+ # Yes, these don't always exist, that's why we're testing
+ # Yes, we're not using the imports in this module.
+ from hashlib import md5 as md5_hash # pylint: disable=W0611,E0611,F0401
+ from hashlib import sha1 as sha1_hash # pylint: disable=W0611,E0611,F0401
+ # this additional version is needed for compatibility with the hmac module
+ sha1 = sha1_hash
+except ImportError:
+ from md5 import new as md5_hash
+ import sha
+ sha1 = sha
+ sha1_hash = sha.new
- Please note that this function provides a C{pred} parameter which isn't
- available in the version included in Python 2.5 and above.
+
+def _all(seq):
+ """Returns True if all elements in the iterable are True.
"""
- for _ in itertools.ifilterfalse(pred, seq):
+ for _ in itertools.ifilterfalse(bool, seq):
return False
return True
-def any(seq, pred=bool): # pylint: disable-msg=W0622
- """Returns True if pred(x) is True for at least one element in the iterable.
-
- Please note that this function provides a C{pred} parameter which isn't
- available in the version included in Python 2.5 and above.
+def _any(seq):
+ """Returns True if any element of the iterable are True.
"""
- for _ in itertools.ifilter(pred, seq):
+ for _ in itertools.ifilter(bool, seq):
return True
return False
-def partition(seq, pred=bool): # pylint: disable-msg=W0622
+try:
+ # pylint: disable=E0601
+ # pylint: disable=W0622
+ all = all
+except NameError:
+ all = _all
+
+try:
+ # pylint: disable=E0601
+ # pylint: disable=W0622
+ any = any
+except NameError:
+ any = _any
+
+
+def partition(seq, pred=bool): # pylint: disable=W0622
"""Partition a list in two, based on the given predicate.
"""
# Even though we're using Python's built-in "partial" function if available,
# this one is always defined for testing.
-def _partial(func, *args, **keywords): # pylint: disable-msg=W0622
+def _partial(func, *args, **keywords): # pylint: disable=W0622
"""Decorator with partial application of arguments and keywords.
This function was copied from Python's documentation.
def newfunc(*fargs, **fkeywords):
newkeywords = keywords.copy()
newkeywords.update(fkeywords)
- return func(*(args + fargs), **newkeywords) # pylint: disable-msg=W0142
+ return func(*(args + fargs), **newkeywords) # pylint: disable=W0142
newfunc.func = func
newfunc.args = args
return newfunc
+if functools is None:
+ partial = _partial
+else:
+ partial = functools.partial
+
+
def TryToRoman(val, convert=True):
"""Try to convert a value to roman numerals
return val
-if functools is None:
- partial = _partial
-else:
- partial = functools.partial
+def UniqueFrozenset(seq):
+ """Makes C{frozenset} from sequence after checking for duplicate elements.
+
+ @raise ValueError: When there are duplicate elements
+
+ """
+ if isinstance(seq, (list, tuple)):
+ items = seq
+ else:
+ items = list(seq)
+
+ result = frozenset(items)
+
+ if len(items) != len(result):
+ raise ValueError("Duplicate values found")
+
+ return result
+
+
+#: returns the first element of a list-like value
+fst = operator.itemgetter(0)
+
+#: returns the second element of a list-like value
+snd = operator.itemgetter(1)
projects / ganeti-local / blobdiff