Why compare twice?
class Student(object):
def __init__(self, name, score):
self.name = name
self.score = score
def __str__(self):
return '(%s: %s)' % (self.name, self.score)
__repr__ = __str__
def __lt__(self, s):
#print(self, '--', s)
if(self.score<s.score):
print(self, '<', s)
return True
if(self.score>s.score):
print(self, '>', s)
return False
if(self.score==s.score):
if(self.name>s.name):
print(self, '>', s)
return False
if(self.name<s.name):
print(self, '<', s)
return True
if(self.name==s.name):
print(self, '==', s)
return False
def __eq__(self, s):
return (self.score == s.score) and (self.name == s.name)
def __gt__(self, s):
return not ((self == s) or (self < s))
def __le__(self, s):
return ((self == s) or (self < s))
def __ge__(self, s):
return ((self == s) or (self > s))
def __nq__(self, s):
return not (self == s)
L = [Student('Tim', 22), Student('Bob', 33), Student('Kevin', 11),
Student('Alice', 11)]
print(sorted(L))
Output:
(Bob: 33) > (Tim: 22)
(Kevin: 11) < (Bob: 33)
(Kevin: 11) < (Bob: 33)
(Kevin: 11) < (Tim: 22)
(Alice: 11) < (Tim: 22)
(Alice: 11) < (Kevin: 11)
[(Alice: 11), (Kevin: 11), (Tim: 22), (Bob: 33)]
Best regards,
Xiaofeng_______________________________________________
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