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Python: Find the indexes of all elements in the given list that satisfy the provided testing function

Python List: Exercise - 230 with Solution

Write a Python program to find the indexes of all elements in the given list that satisfy the provided testing function.

Use enumerate() and a list comprehension to return the indexes of the all element in lst for which fn returns True.

Sample Solution:

Python Code:

def find_index_of_all(lst, fn):
  return [i for i, x in enumerate(lst) if fn(x)]
print(find_index_of_all([1, 2, 3, 4], lambda n: n % 2 == 1))

Sample Output:

[0, 2]

Flowchart:

Flowchart: Find the indexes of all elements in the given list that satisfy the provided testing function.

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Previous: Write a Python program to find the index of the first element in the given list that satisfies the provided testing function.
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Python: Tips of the Day

Big Number Readability:

you can separate zeros with underscore (_)

print(2_000_000)
print(2_000_000 +1)

Output:

2000000
2000001