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Python Python Collections (2016, retired 2019) Dictionaries Teacher Stats

Posted by Ryo Yamamoto
Ryo Yamamoto
9,165 Points

Can't insert the number of courses because of "TypeError: 'int' object is not iterable" error

I wrote this code, but since I used this below:

individual_list.extend(str(len(dictionary[course])))

the number of the courses is strings not integers, and I'm getting this error "TypeError: 'int' object is not iterable" if I take out str(). Does anyone suggest any way to modify this?

teachers.py 
# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.
{'Kenneth Love': ['Python Basics', 'Python Collections'], 'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'], 'Ryo': ['English', 'Geography', 'PE']}

def stats(dictionary):
    course_list = []
    for course in dictionary:
        individual_list = course.split(',')
        individual_list.extend(str(len(dictionary[course])))
        course_list.append(individual_list)
    return course_list

2 Answers

Ryo Yamamoto
Ryo Yamamoto
9,165 Points

Thanks for your comment, but just replacing "extend" with "append" solved this..

def stats(dictionary):
    course_list = []
    for course in dictionary:
        individual_list = course.split(',')
        individual_list.append(len(dictionary[course]))
        course_list.append(individual_list)
    return course_list
Krishna Pratap Chouhan
Krishna Pratap Chouhan
15,203 Points
Krishna Pratap Chouhan
Krishna Pratap Chouhan
15,203 Points

What error is trying to tell us is that you are doing something similar to:

for i in 2:
    print(i)

But what you meant would be something like:

for i in range(2):
    print(i)

range() function is what you should be using.

Also, remember that...

for i in "HelloWorld"
    print i

would work without a doubt but cannot iterate through a integer.

Comment further if this doesn't solves your problem. (y)