[Python]--The Difference append() vs. extend()

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List method:
1. append:Appends object at end.

x = [1, 2]x.append([3,4])print (x)

result: [1,2,[3,4]]
2. extend: Extends list by appending elements from the iterable.

x = [1,2]x.extend([3,4]) print (x)

result: [1,2,3,4]

  1. +=
    Much like the extend().
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