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Python all() FunctionThe python all() function accepts an iterable object (such as list,dictionary etc.). It returns True if all items in passed iterable are true, otherwise it returns False. If the iterable object is empty, the all() function returns True. Signatureall (iterable) Parameters
Return
Python all() Function Example 1Let's see how all() works for lists? # all values true k = [1, 3, 4, 5] print(all(k)) # all values false k = [0, False] print(all(k)) # one false value k = [1, 3, 4, 0] print(all(k)) # one true value k = [0, False, 5] print(all(k)) # empty iterable k = [] print(all(k)) Output: True False False False True Python all() Function Example 2The below example shows how all() works for dictionaries. # Both the keys are true dict1 = {1: 'True', 2: 'False'} print(all(dict1)) # One of the key is false dict2 = {0: 'True', 1: 'True'} print(all(dict2)) # Both the keys are false dict3 = {0: 'True', False: 0} print(all(dict3)) # Empty dictionary dict4 = {} print(all(dict4)) # Here the key is actually true because # 0 is non-null string rather than a zero dict5 = {'0': 'True'} print(all(dict5)) Output: True False False True True Python all() Function Example 3The below example shows how all() works for tuples. # all true values t1 = (1, 2, 3, 4, 5) print(all(t1)) # one false value t2 = (0, 1, "Hello") print(all(t2)) # all false values t3 = (0, False , 0) print(all(t3)) # one true value, all false t4 = (True, 0, False) print(all(t4)) Output: True False False False
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