2D List

[Fasihul Kabir]

a = [0]*5
 for i in range(0, 4):
    for j in range(0, i):
        a[i].append(j)

why the above codes show the following error. and how to overcome it.

Traceback (most recent call last):
  File "<pyshell#10>", line 3, in <module>
    a[i].append(j)
AttributeError: 'int' object has no attribute 'append'



      
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