how to return a string if the dictionary value is an integer in Python

Question

When I comment on all the key - values in my_dict, I should be given the last line, return 'No distance info to available', but it gives me an error

my_dict = {
    # "distance": 500.5,
    # 'speed': 60,
    # 'time': 55
}

    def rout_info(my_data):
        if type(my_data["distance"]) is int:
            return f'Distance to your distination is {my_data["distance"]}'
        elif 'speed' and 'time' in my_data:
            return f'Disntace to your destination is {my_data["speed"] * my_data["time"]}'
        else:
            return 'No distance info to available'
    

print(rout_info(my_dict))

My Error:

Traceback (most recent call last):
     print(rout_info(my_dict))
          ^^^^^^^^^^^^^^^^^^
     if type(my_data["distance"]) is int:
            ~~~~~~~^^^^^^^^^^^^
    KeyError: 'distance'

When I remove the comment, the if operator and the elif operator work for me

Welcome to Stack Overflow. Please include your code and traceback errors as text and not as images. — ewokx, Aug 07 '23 at 02:34
[This](https://meta.stackexchange.com/questions/22186/how-do-i-format-my-code-blocks) is how to add code block — Bench Vue, Aug 07 '23 at 02:47
I would like to see an example of how to use the line: if type(my_data["distance"]) is int: to make everything work — egrqX, Aug 07 '23 at 03:01
Does this answer your question? [Check if a given key already exists in a dictionary](https://stackoverflow.com/questions/1602934/check-if-a-given-key-already-exists-in-a-dictionary) — ryanwebjackson, Aug 10 '23 at 14:45

score 1 · Answer 1 · answered Aug 07 '23 at 05:26

Based on the code provided your error comes from the fact the dictionary is commented out so of course you can't access distance key.

The other issue is that type(my_data["distance"]) is int is a bad practice. is keyword is used to test that objects on both sides refer to the same object and it is normally used for singletons, for example:

a = None
a is None    # True

In other cases isinstance function should be used, so your code should look like:

if isinstance(my_data["distance"], int):

score 1 · Answer 2 · answered Aug 07 '23 at 06:44

1

When the dictionary does not have a key, trying to access it results in an error. In order to prevent such an error you can access your dictionary value using get(), so when a key does not exist it returns None instead of raising an error. the code would look like this:

    if type(my_data.get('distance')) is int:

answered Aug 07 '23 at 06:44

shabnam aboulghasem

130
1
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yea, thanks all works with u code – egrqX Aug 07 '23 at 23:10

how to return a string if the dictionary value is an integer in Python

2 Answers2