mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-09-26 18:29:57 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

Doc: Do not encourage using a base class name in a derived class (GH-22177)

Browse source
This commit is contained in:
Andre Delfino 2020-10-21 02:25:05 -03:00 • committed by GitHub
parent c0f22fb8b3
commit 4642ccd1c3
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Doc/faq/programming.rst
View file

@ -1517,17 +1517,17 @@ order` (MRO) with ``type(self).__mro__``, and return the next in line after
How can I organize my code to make it easier to change the base class? How can I organize my code to make it easier to change the base class?
---------------------------------------------------------------------- ----------------------------------------------------------------------
You could define an alias for the base class, assign the real base class to it You could assign the base class to an alias and derive from the alias. Then all
before your class definition, and use the alias throughout your class. Then all
you have to change is the value assigned to the alias. Incidentally, this trick you have to change is the value assigned to the alias. Incidentally, this trick
is also handy if you want to decide dynamically (e.g. depending on availability is also handy if you want to decide dynamically (e.g. depending on availability
of resources) which base class to use. Example:: of resources) which base class to use. Example::
BaseAlias = <real base class> class Base:
...
BaseAlias = Base
class Derived(BaseAlias): class Derived(BaseAlias):
def meth(self):
BaseAlias.meth(self)
... ...