Python Bool and int comparison and indexing on list with boolean values

Question

Indexing on list with boolean values works fine. Though the index should be an integer.

Following is what I tried in console:

>>> l = [1,2,3         


        

Answer 1

The Python source documentation does not mention directly that all non-zero integers are evaluate to True when passed to an if statement, while only zero evaluates to False. You can prove it to yourself with the following code in Python:

for test_integer in range(-2, 3, ):
    if not test_integer:
        print('{} evaluates to False in Python.'.format(test_integer))
    else:
        print('{} evaluates to True in Python.'.format(test_integer))
>>>-2 evaluates to True in Python.
-1 evaluates to True in Python.
0 evaluates to False in Python.
1 evaluates to True in Python.
2 evaluates to True in Python.

Try it for as far on either side of zero as you want; this code only shows for -2, -1, 0, 1, and 2 inclusive.