Le 14/09/2019 à 03:40, Random832 a écrit :
On Fri, Sep 13, 2019, at 21:22, Hongyi Zhao wrote:
what's the differences: None and null?
null isn't really a concept that exists in Python... while None fills many of
the same roles that null does in some other languages, it is a proper object,
with __str__ and __repr__ methods (that return 'None'), __hash__ (that returns
an arbitrary value), etc.
I add that None is a singleton. There is only one None object.
So testing if a variable is None is done with identity check:
if var is None:
pass
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