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

Jt Miller
Jt Miller
1,242 Points

Been stuck on Functions,Floats,Returns,Trys.

This is what they are asking me to do.

You're doing great! Just one more task but it's a bigger one. Right now, we turn everything into a float. That's great so long as we're getting numbers or numbers as a string. We should handle cases where we get a non-number, though. Add a try block before where you turn your arguments into floats. Then add an except to catch the possible ValueError. Inside the except block, return None. If you're following the structure from the videos, add an else: for your final return of the added floats.

trial.py
def add(num1,num2):
    try:
    num1 = float(num1)
    num2 = float(num2)
    return(num1 + num2)
except ValueError:
    return(none)
else:
    return(num1 + num2)

1 Answer

Henrik Christensen
seal-mask
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,319 Points

You're close:

  • You should not return anything in the try block.
  • Content in the try block is not indented correctly
  • The except block looks fine BUT it's not indented correctly
  • The else block look fine too BUT, again, not indented correctly
def add(a, b):
    try:
        a = float(a)
        b = float(b)
    except ValueError:
        return None
    else:
        return a + b
Jt Miller
Jt Miller
1,242 Points

Thank you, sir instructions are clear and really helped me understand the problem.