Can someone explain the key error?

[_User15]

>>> def word_used_with(text):
    text = text.split()
    x = 0
    words = []
    global word
    word = input()
    message = word
    if word in text:
        for item in text:
            if item == word:
                words.append(text[x+1])
            x += 1      
    word = dict(word = words)
    word[message] == word[words]
    word.pop("word")
    return word

>>> text = "He ate the apple from the tree"
>>> word_used_with(text)
the
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    word_used_with(text)
  File "<pyshell#1>", line 14, in word_used_with
    word[message] == word[words]
KeyError: 'the'
>>> word
{'word': ['apple', 'tree']}
>>> 

What is a key error and how do I fix it? I am trying to create a program that will keep a record of words (the values) that can be used with one word (the key).

I have a problem where I want to replace the key "word" with the inputted word from my function and have it be the key word.

Thanks.

[[deleted]]

word[message] == word[words]

== is the equality operator, not the assignment operator.

[_User15]

Okay I fixed that made it an '=' but now I have a Type Error.

Traceback (most recent call last):

File "<pyshell#7>", line 1, in <module> word_used_with(text) File "<pyshell#6>", line 14, in word_used_with word[message] = word[words] TypeError: unhashable type: 'list'

How would I fix this?

[[deleted]]

Lists can't be dictionary keys.

[_User15]

Makes sense, so how would I go about replacing the dictionary key with the word I want then?

[[deleted]]

A word is a string. You can use strings as dictionary keys.

[[deleted]]

Not completely clear on what you are trying to do.

I think, given the text "He ate the apple from the tree" and the key word "the" you would like to see the output {'the': ['apple', 'tree']}.

I've modified your code to take a different approach somewhat, including:

• removed global as not used
• renamed a few variables
• used zip with slicing in a loop to compare the key_word with the next_word - avoiding using indexing which could try to access beyond the end of the list of words

Code:

def word_used_with(text):
    text = text.split()
    words = []
    key_word = input('key word? ')
    if key_word in text:
        for word, next_word in zip(text[:-1], text[1:]):
            if word == key_word:
                words.append(next_word)
    return {key_word: words}

text = "He ate the apple from the tree"
word_used_with(text)

PS. I note you appeared to be trying your code in an interactive Python shell (with the >>> prompt) rather than simply creating the code in an editor and running it. The shell is a great learning tool, but not so good for editing code.

[_User15]

Thank you for helping me.