== Why is this an issue?

include::../description.adoc[]

=== Noncompliant code example

[source,python]
----
r"[0-9]" # Noncompliant - same as r"\d"
r"[^0-9]" # Noncompliant - same as r"\D"
r"[A-Za-z0-9_]" # Noncompliant - same as r"\w"
r"[\w\W]" # Noncompliant - same as r"."
r"a{0,}" # Noncompliant - same as r"a*"
----

=== Compliant solution

[source,python]
----
r"\d"
r"\D"
r"\w"
r"."
r"a*"
----

include::../implemtation.adoc[]