Check if a predicate evaluates true for all elements in an iterable in Python

Question

I am pretty sure there is a common idiom, but I couldn\'t find it with Google Search...

Here is what I want to do (in Java):

Answer 1

allTrue = all(map(predicate, iterable))
anyTrue = any(map(predicate, iterable))

Answer 2

You can use 'all' and 'any' builtin functions in Python:

all(map(somePredicate, somIterable))

Here somePredicate is a function and all will check if bool() of that element is True.

Answer 3

Do you mean something like:

allTrue = all(somePredicate(elem) for elem in someIterable)
anyTrue = any(somePredicate(elem) for elem in someIterable)

Answer 4

Here is an example that checks if a list contains all zeros:

x = [0, 0, 0]
all(map(lambda v: v==0, x))
# Evaluates to True

x = [0, 1, 0]
all(map(lambda v: v==0, x))
# Evaluates to False

Alternative you can also do:

all(v == 0 for v in x)