why get(key, value) returns the correct value even if you type in the wrong value into the value spot?

Question

so I know what this method does, but i am trying to understand why it does this. For example:

dic = {'a':500, 'b':600}

dic.get('a', 5)

#output

500

i would expect this to be invalid. but it seems to just print the correct value instead of the incorrect value i typed. why does this do that, or is there something else happening that i am missing. Thanks!

Asked By: guywhoasksquestions

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Source

Answer 1

If you read the docs for dict.get you will see that the second argument is meant to be returned if there is no key present in the dictionary.

For example:

my_dict = {"a": 100, "b": 200}
print(my_dict.get("a", 200))  # 100
print(my_dict.get("c", 300))  # 300
print(my_dict["c"])           # raised KeyError

Answered By: foobarna

Answer 2

dict.get() takes a key and optional value parameter, which is returned if the key is not found and does not compare it to the value of the key. I don’t know why you would want to use it like that, but you could use this to get your result:

dic = {'a': 500, 'b': 600}

key, value = 'a', 5
result = dic.get(key)

if result is None or result != value:
    print("Key value pair not found.")

Answered By: B Remmelzwaal

why get(key, value) returns the correct value even if you type in the wrong value into the value spot?

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