1 is not '1' == True - basic understanding

Question

I'm currently having a hard time understanding why the output of

1 is not '1' == True

is

False

The thing is when I'm inserting brackets like that:

1 is not ('1' == True)
(1 is not '1') == True

both return True.

I get the second part, because 1, which is True, is not False, which is the result of the comparison of the string "1" and True. Furthermore, the integer 1 is not the string one, which is true and therefore equal to True. But as soon as I do not put any bracket, it returns False. Why is that?

`1 is not '1' == True` → `1 is not '1' and '1' == True`. But `(1 is not '1') == True` → `(True) == True`. — deceze, May 29 '18 at 08:55
@Moberg, `not` is the indeed the reason this is confusing. Why don't you make it as the answer? — Nishant, May 29 '18 at 08:55

akash karothiya · Answer 1 · 2018-05-29T09:00:59.790

0

is is used to compare address(reference) while == is used t o compare values. Therefore 1 is not '1' == True is always False

As @deceze mentioned, here is the second part:

>>> 1 is not ('1' == True)
>>> ('1' == True)
>>> False
>>> 1 is not False
>>> True

>>> (1 is not '1') == True
>>> (1 is not '1')
>>> True
>>> True == True
>>> True

edited May 29 '18 at 09:00

answered May 29 '18 at 08:50

akash karothiya

5,736
1
19
29

3

Doesn't explain the opposite results when using parentheses. – deceze May 29 '18 at 08:52
1

I don't think it's guaranteed, that a and b refer to the same address. Please give a resource for that. – hellow May 29 '18 at 08:54
Your example and the observed behaviour are unrelated. This does not answer the question. – cs95 May 29 '18 at 08:55
ok, I should delete this answer then – akash karothiya May 29 '18 at 08:56
Yes, because this is a duplicate anyway. – cs95 May 29 '18 at 08:56
Hey @coldspeed how is this duplicate, I am not able to see the second part in original post, just like deceze criticize my answer. – akash karothiya May 29 '18 at 08:58
@deceze added the second part – akash karothiya May 29 '18 at 09:30

1 is not '1' == True - basic understanding

1 Answers1