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copy.copy
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copy.deepcopy
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#coding=gbk
import copy
l1 = [1, 2, [3, 4]]
l2 = copy.copy(l1)
print l1
print l2
l2[2][0] = 50
print l1
print l2
#---- ½á¹û ----
[1, 2, [3, 4]]
[1, 2, [3, 4]]
[1, 2, [50, 4]]
[1, 2, [50, 4]]
ͬÑùµÄ´úÂ룬ʹÓÃÉî¸´ÖÆ£¬½á¹û¾Í²»Ò»Ñù£º
import copy
l1 = [1, 2, [3, 4]]
l2 = copy.deepcopy(l1)
print l1
print l2
l2[2][0] = 50
print l1
print l2
#---- ½á¹û ----
[1, 2, [3, 4]]
[1, 2, [3, 4]]
[1, 2, [3, 4]]
[1, 2, [50, 4]]

¸Ä±äcopyµÄĬÈÏÐÐΪ
¡¡¡¡ÔÚ¶¨ÒåÀàµÄʱºò£¬Í¨¹ý¶¨Òå__copy__ºÍ__deepcopy__·½·¨£¬¿ÉÒԸıäcopyµÄĬÈÏÐÐΪ¡£ÏÂÃæÊÇÒ»¸ö¼òµ¥µÄÀý×Ó:
class CopyObj(object):
def __repr__(self):
return "CopyObj"

def __copy__(self):
return "Hello"
obj = CopyObj()
obj1 = copy.copy(obj)
print obj
print obj1
#---- ½á¹û ----
CopyObj
Hello


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# 024
dict1 = {
'5064001':'Mememe',
'5064002':'tutu',
'5064003':'thrthr',
'5064004':'fofo'
}
print dict1['5064003']
# Ò²¿ÉÒÔʹÓÃÕûÐÍ×÷ΪΨһµÄ±àºÅ
dict2 = {
5064001:'Mememe',
506400 ......

PythonÈëÃŵÄ36¸öÀý×Ó Ö® 26

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# 029
aFile = file(r'C:\in.txt', 'r')
while True:
line = aFile.readline()
if len(line) == 0:
break
# end of if
print line,
# end of while
aFile.close()

output£º
>>>
This is the first line.
This is the second line.
This is ......

PythonÈëÃŵÄ36¸öÀý×Ó Ö® 30

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# 034
class Person:
def __init__(self, name):
self.name = name # ÕâÒ»¾äÖеÚÒ»¸önameÊÇÀàÖаüº¬µÄÓò£¬µÚ¶þ¸önameÊÇ´«½øÀ´µÄ²ÎÊý
# end of def
def sayHello(self):
print 'Hello!'
# end of def
# end of class
p = Person('Ning')
print p.nam ......

PythonÈëÃŵÄ36¸öÀý×Ó Ö® 32

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A Byte Of Python
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Suppose you want to write a program which has to keep track of the
teachers and students in a college. They have some common
characteristics such as name, age and address. They also have specific
characteristics such as sala ......

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