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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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PythonÈëÃŵÄ36¸öÀý×Ó Ö® 18

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# _018
# This is a module (if write Chinese in a module, there will be a error)
def func1():
print 'This is function 1.'
def func2():
print 'This is function 2.'
def func3():
print 'This is function 3.'
# 019
# ʹÓÓimport”Óï¾äµ÷ÓÃÄ£¿é£º
import _018_Module
_ ......

PythonÈëÃŵÄ36¸öÀý×Ó Ö® 21

Ô´´úÂëÏÂÔØ£ºÏÂÔØµØÖ·ÔÚÕâÀï
# 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® 23

Ô´´úÂëÏÂÔØ£ºÏÂÔØµØÖ·ÔÚÕâÀï
# 026
aList = ['1','2','3','4']
aListCopy = aList # Æäʵ£¬ÕâÀï½ö½ö¸´ÖÆÁËÒ»¸öÒýÓÃ
del aList[0]
print aList
print aListCopy # Á½¸öÒýÓÃÖ¸ÏòÁËÁËͬһ¸ö¶ÔÏó£¬ËùÒÔ´òÓ¡½á¹ûÒ»Ñù
aListCopy = aList[:] # ÕâÊǸ´ÖÆÕû¸ö¶ÔÏóµÄÓÐЧ·½·¨
del aList[0]
print aList
print aListCopy
......

PythonÈëÃŵÄ36¸öÀý×Ó Ö® 36

# 040
import time
try:
f = file('040_Finally.py')
while True:
line = f.readline()
if len(line) == 0:
break
time.sleep(0.33)
print line,
# end of while
finally:
f.close()
print 'Closed the file.'
# end of try
output£º
> ......

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