Why does the expression 0 < 0 == 0 return False in Python?

Question

Looking into Queue.py in Python 2.6, I found this construct that I found a bit strange:

def full(self):
    \"\"\"Return True if the queue is full, False oth         


        

Answer 1

Here it is, in all its glory.

>>> class showme(object):
...   def __init__(self, name, value):
...     self.name, self.value = name, value
...   def __repr__(self):
...     return "" % (self.name, self.value)
...   def __cmp__(self, other):
...     print "cmp(%r, %r)" % (self, other)
...     if type(other) == showme:
...       return cmp(self.value, other.value)
...     else:
...       return cmp(self.value, other)
... 
>>> showme(1,0) < showme(2,0) == showme(3,0)
cmp(, )
False
>>> (showme(1,0) < showme(2,0)) == showme(3,0)
cmp(, )
cmp(, False)
True
>>> showme(1,0) < (showme(2,0) == showme(3,0))
cmp(, )
cmp(, True)
True
>>>