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Python: Check if a given function returns True for at least one element in the list

Python List: Exercise - 259 with Solution

Write a Python program to check if a given function returns True for at least one element in the list.

Use all() and fn to check if fn returns False for all the elements in the list.

Sample Solution:

Python Code:

def test(lst, fn = lambda x: x):
  return all(not fn(x) for x in lst)
print(test([1, 0, 2, 3], lambda x: x >= 3 ))
print(test([1, 0, 2, 3], lambda x: x < 0 ))
print(test([2, 2, 4, 4]))

Sample Output:

False
True
False

Flowchart:

Flowchart: Check if a given function returns True for at least one element in the list.

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Previous: Write a Python program to create a given flat list of all the keys in a flat dictionary.
Next: Write a Python program to check if all the elements of a list are included in another given list.

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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