Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Python Collections (2016, retired 2019) Dictionaries Word Count

Sahil Kapoor
Sahil Kapoor
8,932 Points

What is unhashable TypeError 'list'.

What is the problem with this code my computer's terminal is printing the output correctly but this is showing me unhashable TypeError ?

# E.g. word_count("I do not like it Sam I Am") gets back a dictionary like:
# {'i': 2, 'do': 1, 'it': 1, 'sam': 1, 'like': 1, 'not': 1, 'am': 1}
# Lowercase the string to make it easier.

def word_count(string):
    string = string.lower()
    string = string.split(" ")
    dictionary = {}
    for word in string:
        dictionary[word] = [string.count(word)]

    return dictionary 

1 Answer

Stephen Cole
Stephen Cole
Courses Plus Student 12,641 Points

In my experience, I've had TypeError List when I inadvertently treat a list as a string or a string as a list.

string.count will count the number of sub strings. This means it needs to parse a string and you gave it a list. That's probably why you're getting a type error.