Question

How to replace all the occurrences of an element in a nested list with Python

Answer 1

nestedlist = [[1, 2, 3], [1, 5], [6, 1, 8, 9, 10], [9, 27, 1, 85], [1]]

for i1, sub_list in enumerate(nestedlist):
    for i2, element in enumerate(sub_list):
        if element == 1:
            nestedlist[i1][i2] = 777       
            
print(nestedlist)


'''
run:

[[777, 2, 3], [777, 5], [6, 777, 8, 9, 10], [9, 27, 777, 85], [777]]

'''

 

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