Python

Python: Check if an iterable contains a specific element

Python Clean Code Tip:

Use in to check whether an iterable contains a specific element.

👇

lucky_numbers = [1, 23, 13, 1234]
BEST_NUMBER = 13


# without in
best_number_is_lucky_number = False

for number in lucky_numbers:
    if number == BEST_NUMBER:
        best_number_is_lucky_number = True

print(best_number_is_lucky_number)
# => True


# with in
best_number_is_lucky_number = BEST_NUMBER in lucky_numbers
print(best_number_is_lucky_number)
# => True