Nick the Gr33k writes:
> >>> (a or b or c)
> 'abcd'
>
> This for me, should evaluate to True but instead it has been
> evaluated to the first variable's value, which is a truthy value of
> course since its not an empty string, but shouldn't it return True
> instead?
In your own programs, write bool(a or b or c) instead. And instead of
writing (k in (a or b or c)), write ((k in a) or (k in b) or (k in c))
-- you can use fewer parentheses if you like, but only if you are
comfortable with it. (Here, I use the outer parentheses to separate
Python from English. I might not use them in code.)
Usually such expressions occur as conditions in conditional statements
or conditional expressions. There, the bool() makes no observable
difference.
> Returning True is the same thing as returning a variable's truthy
> value?
I think that's a good approximation. Strictly speaking, True is a
particular value in Python, but I think that at the moment you need to
understand that what is important is how the value is interpreted as a
condition in a conditional statement (if condition:, elif: condition),
a conditional expression (x if condition else y), a while loop (while
condition:).
>>> while "ijkl": print("it doesn't matter")
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