Re: [PATCH v2] kernel-doc: rename the kernel-doc directive 'functions' to 'identifiers'
From: Markus Heiser
Date: Tue Oct 29 2019 - 01:53:37 EST
Am 29.10.19 um 01:31 schrieb Changbin Du:
But is it, really? I agree with Jon about the distinction between None
Here python is different from C. Both empty string and None are False in python.
and '' being confusing.
Note such condition is common in python.
The one is a empty string str(''), its bool('') value is False.
| >>> type(''), bool('')
| (<class 'str'>, False)
The other is a NoneType, its bool(None) value is False.
| >>> type(None), bool(None)
| (<class 'NoneType'>, False)
None often used like NULL (pointer). E.g if a function does not give an explicit
return value, the returned value is None.
| >>> def foo():
| ... pass
| >>> print(foo())
-- Markus --