CODEWITHSUNDEEP
python-3.x
Daniel
Daniel

Reputation: 3511

Select only keys from dict with values

I have a very long dictionary

mydict = {
    "6574": [],
    "3234": [1],
    "7014": [],
    "0355": [3],
    "1144": [2],
    # …
}

I need to get all keys that have a non-empty list.

mytruedict = {}
for k, v in mydict.items():
    if v:
        mytruedict[k]=v

I was wondering if there is a one-line approach to it.

Upvotes: 1

Views: 22

Answers (1)

Rakesh
Rakesh

Reputation: 82765

Using dict

Ex:

mydict = {
    "6574": [],
    "3234": [1],
    "7014": [],
    "0355": [3],
    "1144": [2]
}

print( dict((k, v) for k, v in mydict.items() if v) )
#or
print( {k: v for k, v in mydict.items() if v } )   #dict comprehension

Output:

{'3234': [1], '1144': [2], '0355': [3]}

Upvotes: 3

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