Python合并兩個List

1.使用list的extend()方法，現有兩個list分别為L1和L2：

>>> L1 = [1, 2, 3, 4, 5]
 >>> L2 = [20, 30, 40]
 >>> L1.extend(L2)
 >>> L1
 [1, 2, 3, 4, 5, 20, 30, 40]
           

>>> L1 = [1, 2, 3, 4, 5]
>>> L2 = [20, 30, 40]
>>> L1[len(L1):len(L1)] = L2
>>>
>>> L1
[1, 2, 3, 4, 5, 20, 30, 40]
           

'''
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'''
 >>> L1 = [1, 2, 3, 4, 5]
 >>> L2 = [20, 30, 40]
 >>> L1[0:0] = L2
 >>> L1
 [20, 30, 40, 1, 2, 3, 4, 5]
           

>>> L1 = [1, 2, 3, 4, 5]
>>> L2 = [20, 30, 40]
>>>
>>> L1[1:1] = L2
>>> L1
[1, 20, 30, 40, 2, 3, 4, 5]