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Python Python Basics (2015) Logic in Python Try and Except

Arnav Goyal
Arnav Goyal
1,634 Points
Posted by Arnav Goyal
Arnav Goyal
1,634 Points

Help in coding practice in python basics course.

I need help in challenge task 2 of 3 in the coding test.

trial.py 
def add(num1, num2):
    return (num1+num2)
add(3, 4)

2 Answers

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

So this code works for the first task, but on task 2, you have to transform the a and b to float. Here is a better example:

def add(a, b):
  return (a + b)

Also, don't call the function, just write the function out. The Code Challenge will test the function for you.

For task 3, it is asking for some error handling. because if the value (in this case, a and b) transforming into a float might return an error, and that isn' t user-friendly. So you want to "catch" the error and just return None. Here is the full code:

def add(a, b):
  try:
    return float(a) + float(b)
  except ValueError:
    return None

Hope it helps! ~xela888