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Doc: Do not encourage using a base class name in a derived class (GH-22177)
pull/22856/head
Andre Delfino
6 years ago
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1 changed files with
6 additions and
6 deletions
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Doc/faq/programming.rst
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@ -1517,18 +1517,18 @@ order` (MRO) with ``type(self).__mro__``, and return the next in line after |
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How can I organize my code to make it easier to change the base class? |
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---------------------------------------------------------------------- |
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You could define an alias for the base class, assign the real base class to it |
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before your class definition, and use the alias throughout your class. Then all |
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You could assign the base class to an alias and derive from the alias. Then all |
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you have to change is the value assigned to the alias. Incidentally, this trick |
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is also handy if you want to decide dynamically (e.g. depending on availability |
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of resources) which base class to use. Example:: |
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BaseAlias = <real base class> |
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class Base: |
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... |
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BaseAlias = Base |
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class Derived(BaseAlias): |
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def meth(self): |
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BaseAlias.meth(self) |
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... |
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... |
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How do I create static class data and static class methods? |
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