rspec/rules/S2712/python/rule.adoc

Functions that use ``++yield++`` are known as "generators". Before Python 3.3, generators cannot ``++return++`` values. Similarly, functions that use ``++return++`` cannot use ``++yield++``. Doing so will cause a ``++SyntaxError++``.


Either upgrade your version of Python to a version >= 3.3, or don't use both return and yield in a function.


== Noncompliant Code Example

----
def adder(n):
     num = 0
     while num < n:
         yield num
         num += 1
     return num  #Noncompliant
----