mirror of
https://github.com/python/cpython.git
synced 2024-12-14 20:34:12 +08:00
bed7d04fed
svn+ssh://pythondev@svn.python.org/python/trunk ........ r74095 | benjamin.peterson | 2009-07-19 15:18:21 -0500 (Sun, 19 Jul 2009) | 1 line split unittest.py into a package ........
76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
"""Various utility functions."""
|
|
|
|
def strclass(cls):
|
|
return "%s.%s" % (cls.__module__, cls.__name__)
|
|
|
|
def sorted_list_difference(expected, actual):
|
|
"""Finds elements in only one or the other of two, sorted input lists.
|
|
|
|
Returns a two-element tuple of lists. The first list contains those
|
|
elements in the "expected" list but not in the "actual" list, and the
|
|
second contains those elements in the "actual" list but not in the
|
|
"expected" list. Duplicate elements in either input list are ignored.
|
|
"""
|
|
i = j = 0
|
|
missing = []
|
|
unexpected = []
|
|
while True:
|
|
try:
|
|
e = expected[i]
|
|
a = actual[j]
|
|
if e < a:
|
|
missing.append(e)
|
|
i += 1
|
|
while expected[i] == e:
|
|
i += 1
|
|
elif e > a:
|
|
unexpected.append(a)
|
|
j += 1
|
|
while actual[j] == a:
|
|
j += 1
|
|
else:
|
|
i += 1
|
|
try:
|
|
while expected[i] == e:
|
|
i += 1
|
|
finally:
|
|
j += 1
|
|
while actual[j] == a:
|
|
j += 1
|
|
except IndexError:
|
|
missing.extend(expected[i:])
|
|
unexpected.extend(actual[j:])
|
|
break
|
|
return missing, unexpected
|
|
|
|
|
|
def unorderable_list_difference(expected, actual):
|
|
"""Same behavior as sorted_list_difference but
|
|
for lists of unorderable items (like dicts).
|
|
|
|
As it does a linear search per item (remove) it
|
|
has O(n*n) performance."""
|
|
missing = []
|
|
while expected:
|
|
item = expected.pop()
|
|
try:
|
|
actual.remove(item)
|
|
except ValueError:
|
|
missing.append(item)
|
|
|
|
# anything left in actual is unexpected
|
|
return missing, actual
|
|
|
|
def CmpToKey(mycmp):
|
|
'Convert a cmp= function into a key= function'
|
|
class K(object):
|
|
def __init__(self, obj, *args):
|
|
self.obj = obj
|
|
def __lt__(self, other):
|
|
return mycmp(self.obj, other.obj) == -1
|
|
return K
|
|
|
|
def three_way_cmp(x, y):
|
|
"""Return -1 if x < y, 0 if x == y and 1 if x > y"""
|
|
return (x > y) - (x < y)
|