Calculate GPA score in two decimals from multiple grade arguments

Question

Need help to validate this code- something is not working in code. I have put this to calculate GPA from multiple arguments

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import sys

(sys.argv[0])
grades= (sys.argv[1])
 def cal(grades):
     i = 0
     score = 0
     x = {'A':4.0, 'A-':3.66, 'B+':3.33, 'B':3.0, \
    'B-':2.66, 'C+':2.33, 'C':2.0, 'C-':1.66, \
    'D+':1.33, 'D':1.00, 'D-':.66, 'F':0.00}
     if grades !=[]:
         for a in grades:
             score += x[a]
         gpa = score/len(grades)
         return gpa
         print(gpa)
     else:
         return None
         print(None)
 cal(grades)

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Answer 1

no value is getting printed because the return statements will return the value before it will actually be able to print anything.

you must print before returning the values Example:

def example(arg1):
    return None,arg1
    print("Result:",(None,arg1))
example(1)

it wouldn't show anything.

but if you do:

def functioningexample(arg1):
    print("RESULT:",(None,arg1))
    return None,arg1
fe = functioningexample(1)
print("it worked? the result Was :",fe)

you would get

>>> RESULT:(None,1)
>>> it worked? the result Was : (None,1)