rspec/rules/S3699/python/rule.adoc

== Why is this an issue?

If a function does not return anything, it makes no sense to use its output. Specifically, passing it to another function, or assigning its "result" to a variable is probably a bug because such functions return nothing, which is probably not what was intended.

=== Noncompliant code example

[source,python]
----
def foo():
  l = [1, 2, 3]
  result = l.append(42) # Noncompliant, `append` mutates list l
  return result
----

=== Compliant solution

[source,python]
----
def foo():
  l = [1, 2, 3]
  l.append(42)
  return l
----

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== Implementation Specification
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include::../message.adoc[]

include::../highlighting.adoc[]

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== Comments And Links
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include::../comments-and-links.adoc[]
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