bool

[PreservedKillich]

cmd_array[] contains ['EVENT_EXTANT_WINDOW', '82', '1', '10', '0']

bool_expected = bool(cmd_array[4])
returns True

Why?

Thanks

[ichabod801]

The general idea of bool is that if it's empty, it's False. 0, the number, is empty, so it's False. '0', the string, is not empty: it has one character. So it's True.

[PreservedKillich]

Thanks for posting.

So the numbers in the list are strings or an object? Should I cast it to int first?

bool_expected = bool(int(cmd_array[4]))

[wavic]

In Python, everything is an object and almost any container can store objects of different types/classes. Even functions and custom class instances.
For example:

>>> def double(num):
...     return num + num
... 
>>> a_list = ['This is a string object', True, None, 0, -14.5, 42, 0 , double, '11']
>>> for element in a_list:
...     print(type(element))
... 
<class 'str'>
<class 'bool'>
<class 'NoneType'>
<class 'int'>
<class 'float'>
<class 'int'>
<class 'int'>
<class 'function'>
<class 'str'>

So the first element is a string obviously as the last one. There is a None, a boolean type, some integers, a float and a function which you can point to and call it from the list:

>>> a_list[-2](8)
16

[ichabod801]

Everything in your list is a string. So if you want the zeros in the list to be False, you either need to convert them to ints, or you need to explicitly test for the string '0' (cmd_array[4] != '0').

[PreservedKillich]

I wanted to convert the string numbers to 1 or zero but this did not work, it still gave me True.
expected = bool(int(cmd_array[4]))

It looks like bool reports whether or not it exists and not zeroness.

So I switched to:

expected = True if int(cmd_array[4]) > 0 else False

and that works and thus my whole test function now works.

So hopefully I will now go back to other languages and leave you folks alone.

Thanks.

[Skaperen]

try bool('0'),bool(0) and see what you get.