== Why is this an issue?

include::../description.adoc[]

The default regular expression allows the "CapWords" convention and the "snake_case" in lowercase. The style guide PEP-8 recommends using the "CapWords" convention in every case but also accepts the "snake_case" convention when the class is primarily used as a callable (ex: decorator, context manager, etc...).

For example, with the default provided regular expression ``++^_?([A-Z_][a-zA-Z0-9]*|[a-z_][a-z0-9_]*)$++``, the classes:

[source,python]
----
class myClass:  # Noncompliant
   ...

class my_CONTEXT_manager:  # Noncompliant
    def __enter__(self):
        pass
    def __exit__(self, type, value, traceback):
        pass
----

should be renamed to

[source,python]
----
class MyClass:
   ...

class my_context_manager:
    def __enter__(self):
        pass
    def __exit__(self, type, value, traceback):
        pass
----

== Resources

=== Documentation

* https://peps.python.org/pep-0008/#class-names[PEP 8 – Style Guide for Python Code]
* https://en.wikipedia.org/wiki/Snake_case[Wikipedia: Snake case]

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]

=== Parameters

.format
****

----
^_?([A-Z_][a-zA-Z0-9]{empty}*|[a-z_][a-z0-9_]{empty}*)$
----

Regular expression used to check the class names against.
****


'''
== Comments And Links
(visible only on this page)

include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]
