(Use Python) Use the Design Recipe to define a function called black_jack which consumes to 2 int values greater than 0. Return whichever value is nearest to 21 without going over. Return 0 if they...

(Use Python) Use the Design Recipe to define a function called
black_jack  which consumes to 2
int
 values greater than 0.  Return whichever value is nearest to 21 without going over. Return 0 if they both go over. Include a docstring!

For example:

Write threeassert_equal statements to test your function.