== Why is this an issue?

include::../description.adoc[]


=== Noncompliant code example

[source,python]
----
import re
pattern1 = re.compile(r"a++abc", re.DOTALL) # Noncompliant, the second 'a' never matches
pattern2 = re.compile(r"\d*+[02468]", re.DOTALL) # Noncompliant, the sub-pattern "[02468]" never matches
----


=== Compliant solution

[source,python]
----
import re
pattern1 = re.compile(r"aa++bc", re.DOTALL) # Compliant, for example it can match "aaaabc"
pattern2 = re.compile(r"\d*+(?<=[02468])", re.DOTALL) # Compliant, for example, it can match an even number like "1234"
----