Filip Gruszczyński a écrit :
One of the Python Zen rules is Explicit is better implicit. And yet
it's ok to do:
if x:
do_sth
when x is string or list. Since it's very comfy, I've got nothing
against though. I am just curious, why is it so?
Because it is explicit (or at least considered as such) that in Python,
an empty list or string (as well as empty tuples, dicts and sets and
numeric zeros, False and None) have a false value in a boolean context.
And one more thing: is it ok to do
if x:
instead of
if x is not None:
Depends on the context. You of course understand that the two
expressions are not equivalent, don't you ?-)
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