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Python Python Basics (Retired) Putting the "Fun" Back in "Function" Functions

Posted by thuselem
thuselem
7,716 Points

AttributeError: 'NoneType' object has no attribute 'lower'

When I run my code for Task 2, I am getting an AttributeError message. The code seems to work in Workspaces.

Could anyone help figure out why I am getting this error?

Thank you!

functions.py 
# add_list([1, 2, 3]) should return 6
# summarize([1, 2, 3]) should return "The sum of [1, 2, 3] is 6."
# Note: both functions will only take *one* argument each.

def add_list(numList):
  total = 0
  for number in numList:
    total += number
  return total

def summarize(numList):    
  strList = str(numList)  
  print("The sum of {} is {}.".format(strList,add_list(numList)))

2 Answers

Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

summarize() needs to return the string, not print() it.

thuselem
thuselem
7,716 Points

Yup, that was it. Thank you for the help!

Fareeza Khurshed
Fareeza Khurshed
1,880 Points
Fareeza Khurshed
Fareeza Khurshed
1,880 Points

I don't see anything technically wrong with your code, so it works, but probably fails the tests for the assignment.

My guess is that the strList is unnecessary as format() takes care of that.