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

Mark Ramos
Mark Ramos
19,209 Points

word_count Challenge

My code below seems to work OK in Workspace, but doesn't pass the challenge. Any idea what I've got wrong?

# 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):
    dict = {}
    count = []
    words = string.lower().split(" ")
    for word in words:
        dict[word] = words.count(word)
    return dict
Steven Olick
Steven Olick
1,561 Points

Hi Mark, your answer helped me wrap my head around this a little better. My answer was not too far off from yours. However, I was wondering if you could explain this line for me. It was where I got stuck in my answer.

dict[word] = words.count(word)

What exactly does the dict[word] do?

Mark Ramos
Mark Ramos
19,209 Points

Hey Steven - the line you referred to is a way to add a new key and value to a dictionary. For example:

>>> my_dict = {'a': 1, 'b': 2}
>>> print(my_dict)
{'a': 1, 'b': 2}

>>> my_dict['c'] = 3
>>> print(my_dict)
{'a': 1, 'b': 2, 'c': 3}

So 'dict' was just calling my empty dictionary from earlier in the block and [word] was me adding new keys to dict, one for every word in words. I hope that is helpful!

Steven Olick
Steven Olick
1,561 Points

SO helpful. Thanks for breaking that down for me!!

1 Answer

use split with no arguments, and it will split at the whitespace. try it and it will pass.

words = string.lower().split()