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>>> a = [1, 2, 3, 4]
>>> b = [1, 2, 4, "3"]
>>> a == b
False
>>> a < b
True
>>> a > b
False
>>> a, b = b, a
>>> a
[1, 2, 4, '3']
>>> b
[1, 2, 3, 4]
>>> id(a)
12643064
>>> id(b)
12752576
>>> a < b
False
>>> b < a
True
>>> a = [1, "4"]
>>> b = [2]
>>> a < b
True
>>> id(a)
12642104
>>> id(b)
12643064
>>> c = [0]
>>> a < c
False
>>> id(c)
12752576
>>> a = [1]
>>> b = ["1"]
>>> a < b
True
>>> id(a)
12243072
>>> id(b)
12642104
>>> a = ["1"]
>>> b = [1]
>>> a < b
False
>>> id(a)
12643064
>>> id(b)
12243072
>>>


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# 033
class Person:
age = 22
def sayHello(self): # ·½·¨Ó뺯ÊýµÄÇø±ðÔÚÓÚÐèÒªÒ»¸öself²ÎÊý
print 'Hello!'
# end of def
# end of class # ÕâÊÇÎÒÁ¼ºÃµÄ±à³Ì·ç¸ñ
p = Person()
print p.age
p.sayHello()

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# 039
while True:
try:
x = int(raw_input('Input a number:'))
y = int(raw_input('Input a number:'))
z = x / y
except ValueError, ev:
print 'That is not a valid number.', ev
except ZeroDivisionError, ez:
print 'Di ......

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d:\usr\local\Python25>python
Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit (Intel)] onwin32
Type "help", "copyright", "credits" or "license" for ......

Python Firewall Win32 (pyfw

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