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PEP 483: Fix an example (#2143) 

The body of one of the examples mistakenly used different names than the parameters given in the function signature.
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johnjhawk 2021-11-14 14:39:30 -08:00 committed by GitHub
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pep-0483.txt
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@ -486,7 +486,7 @@ replaced by the most-derived base class among ``t1``, etc. Examples:
Note that the type checker will reject this function:: Note that the type checker will reject this function::
def concat(first: U, second: U) -> U: def concat(first: U, second: U) -> U:
return x + y # Error: can't concatenate str and bytes return first + second # Error: can't concatenate str and bytes
For such cases where parameters could change their types only simultaneously For such cases where parameters could change their types only simultaneously
one should use constrained type variables. one should use constrained type variables.