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Chris Navarro
371 PointsPython Basics- functions
Hey guys, I don't understand why my Python code is not working properly. Is my syntax wrong? Can't I call another function within another function? Thank you!
So basically the first question is: Make a function named add_list that takes a list. The function should then add all of the items in the list together and return the total. Assume the list contains only numbers. You'll probably want to use a for loop. You will not need to use input().
My code:
def add_list(list):
total=sum(list)
return total
But the second one tells us to make a function summarize() that takes the list and prints "The sum of X is Y", where X is the list and Y is the sum. This is where my code does not work.
My code (below the first one):
def summarize(list):
print "The sum of {} is {}".format(list.str(), add_list(list))
4 Answers
Chris Freeman
Treehouse Moderator 68,441 PointsIn the line
print "The sum of {} is {}".format(list, add_list(list))
The .str() is unnecessary. The .format() method does the conversion to a string automatically.
The other suggestions of not using the built-in type list as a variable name and to use a loop instead of the built-in function some are also valid but aren't causing the error.
Josh Keenan
20,315 PointsTry to avoid using 'list' as an argument name, it is a reserved word and in certain IDEs it can cause problems as it thinks you're trying to call the list() function, use my_list or list1, I stick to simple things like that normally!
Krzysztof Kucharzyk
Front End Web Development Techdegree Student 4,005 PointsHmm I think you should do something like this:
def add_list(lst) :
result = 0
for item in lst:
result += item
return result
And for 2nd part define summarize with lst value and then return:
def summarize(lst):
return "The sum of " + str(lst) + " is " + str(add_list(lst)) + "."
Chris Navarro
371 PointsThank you so much! :)