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Test Whether Specific Key and Value Exist in Dictionary Where Multiple Values Stored as Lists

November 9, 2021

I have a dictionary that sometimes contains multiple values per key. I want to test if both a specific key and specific value is present. I can do this where there are single values but cannot work out how to do it where multiple values exist in a list format.

So, in the example below the code should print "sport present" but it doesn’t. Presumably I need to iterate through the list but how do I do this whilst also testing the key?

student_dict = {
    "student1": ["esports"],
    "student2": ["football", "basketball"],
    "student3": ["football"]
}

key = "student2"
value = "football"

if (key, value) in student_dict.items():
    print("Sport present")

>Solution :

First test the key, then get the value (the list) associated with the key and test it.

You can do it like this:

student_dict = {
    "student1": ["esports"],
    "student2": ["football", "basketball"],
    "student3": ["football"]
}

key = "student2"
value = "football"

if key in student_dict:
    if value in student_dict[key]:
        print("Sport present")