CODEWITHSUNDEEP
pythonpython-2.7dictionary
jOhN MylEP
jOhN MylEP

Reputation: 23

Python dictionary code

So I need to write a python code for getting all the keys in a dictionary with unique values. For example

my_dict = {4:3, 5:3, 6:4, 9:8}

the program should print

[6, 9]

Because the 3 is repeated in the values. I do not know how to see if the values are different and then how to remove them as there is no ".remove()" for dictionaries. I have tried making a list of keys and values, then trying to mutate them in some way, but I have had no luck. Thanks

Upvotes: 0

Views: 299

Answers (1)

Padraic Cunningham
Padraic Cunningham

Reputation: 180391

Count the values with a collections.Counter dict then only keep keys from you dict with a value that is equal to 1 in the Counter dict.

my_dict = {"4":"3", "5":"3", "6":"4", "9":"8"}


from collections import Counter

cn = Counter(my_dict.itervalues())
print([k for k,v in my_dict.iteritems() if cn[v] == 1])
['6', '9']

Upvotes: 4

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