Python all() Function

Check if all items in a list are True:

mylist = [True, True, True]
x = all(mylist)

Definition and Usage

The all() function returns True if all items in an iterable are true, otherwise it returns False.

If the iterable object is empty, the all() function also returns True.

all(iterable)

Parameter	Description
iterable	An iterable object (list, tuple, dictionary)

Check if all items in a list are True:

mylist = [0, 1, 1]
x = all(mylist)

Check if all items in a tuple are True:

mytuple = (0, True, False)
x = all(mytuple)

Check if all items in a set are True:

myset = {0, 1, 0}
x = all(myset)

Check if all items in a dictionary are True:

mydict = {0 : "Apple", 1 : "Orange"}
x = all(mydict)

Note: When used on a dictionary, the all() function checks if all the keys are true, not the values.