python multi array

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Created on 2014-8-29

@author: hg
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#http://www.cnblogs.com/btchenguang/archive/2012/01/30/2332479.html

myList =  [[0] * 3] * 4

myList[0][1] = myList[0][1] +2
print ‘shallow copy: ‘
for i in range(0,4):
    for j in range(0,3):
        print str(myList[i][j]),"\t",
    print
print   
myList =  [([0] * 3) for i in range(4)]

myList[0][1] = myList[0][1] +2
print ‘not shallow copy: ‘
for i in range(0,4):
    for j in range(0,3):
        print str(myList[i][j]),"\t",
    print
print