Viewing file:  test_compare.py (1.26 KB) -rw-r--r--
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import sys
class Empty:
def __repr__(self):
return '<Empty>'
class Coerce:
def __init__(self, arg):
self.arg = arg
def __repr__(self):
return '<Coerce %s>' % self.arg
def __coerce__(self, other):
if isinstance(other, Coerce):
return self.arg, other.arg
else:
return self.arg, other
class Cmp:
def __init__(self,arg):
self.arg = arg
def __repr__(self):
return '<Cmp %s>' % self.arg
def __cmp__(self, other):
return cmp(self.arg, other)
candidates = [2, 2.0, 2L, 2+0j, [1], (3,), None, Empty(), Coerce(2), Cmp(2.0)]
def test():
for a in candidates:
for b in candidates:
try:
x = a == b
except:
print 'cmp(%s, %s) => %s' % (a, b, sys.exc_info()[0])
else:
if x:
print "%s == %s" % (a, b)
else:
print "%s != %s" % (a, b)
# Ensure default comparison compares id() of args
L = []
for i in range(10):
L.insert(len(L)//2, Empty())
for a in L:
for b in L:
if cmp(a, b) != cmp(id(a), id(b)):
print "ERROR:", cmp(a, b), cmp(id(a), id(b)), id(a), id(b)
test()
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