Question

How to replace a specific element in a list with its ordinal number using Python

Answer 1

lst = ["a", "b", "c", "c", "b", "d", "e"]

result = [i + 1 if x == "b" else x for i, x in enumerate(lst)]
print(result)


'''
run:
 
['a', 2, 'c', 'c', 5, 'd', 'e']
 
'''
 

 

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