Sylvain Thenault wrote:
Hi there !

Can someone explain me the following behaviour ?


l = []
0 in (l is False)

Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: iterable argument required

(0 in l) is False

True

0 in l is False

False


This is really obscur to me...

A suggestion:
When discussing things on the newsgroup (and in your code), avoid
symbols like "l" and "O" -- they look too much like numbers.  Picking
an actual name is best (but depends on your application context).
Second best are names like: "lst", "obj", ...: often, however, such
names are necessary when discussing abstract code properties.

-Scott
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