Python | Check if given multiple keys exist in a dictionary
A dictionary in Python consists of a collection of key-value pairs. Each key-value pair maps the key to its associated value.
Input : dict[] = {“geeksforgeeks” : 1, “practice” : 2, “contribute” :3}
keys[] = {“geeksforgeeks”, “practice”}
Output : YesInput : dict[] = {“geeksforgeeks” : 1, “practice” : 2, “contribute” :3}
keys[] = {“geeksforgeeks”, “ide”}
Output : No
Let’s discuss various ways of checking multiple keys in a dictionary :
Method #1 Using comparison operator :
This is the common method where we make a set which contain keys that use to compare and using comparison operator we check if that key present in our dictionary or not.
# Python3 code to check multiple key existence # using comparison operator # initializing a dictionary sports = {"geeksforgeeks" : 1, "practice" : 2, "contribute" :3} # using comparison operator print(sports.keys() >= {"geeksforgeeks", "practice"}) print(sports.keys() >= {"contribute", "ide"}) |
chevron_right
filter_none
Output:
True False
Method #3 Using issubset() :
In this method, we will check the keys that we have to compare is subset() of keys in our dictionary or not.
# Python3 code heck multiple key existence # using issubset # initializing a dictionary sports = {"geeksforgeeks" : 1, "practice" : 2, "contribute" :3} # creating set of keys that we want to compare s1 = set(['geeksforgeeks', 'practice']) s2 = set(['geeksforgeeks', 'ide']) print(s1.issubset(sports.keys())) print(s2.issubset(sports.keys())) |
chevron_right
filter_none
Output:
True False
Method #4 Using if and all statement :
In this method we will check that if all the key elements that we want to compare are present in our dictionary or not .
# Python3 code check multiple key existence # using if and all # initializing a dictionary sports = {"geeksforgeeks" : 1, "practice" : 2, "contribute" :3} # using if, all statement if all(key in sports for key in ('geeksforgeeks', 'practice')): print("keys are present") else: print("keys are not present") # using if, all statement if all(key in sports for key in ('geeksforgeeks', 'ide')): print("keys are present") else: print("keys are not present") |
chevron_right
filter_none
Output:
keys are present keys are not present
Recommended Posts:
- Python dictionary with keys having multiple inputs
- Python | Add new keys to a dictionary
- Python Dictionary | keys() method
- Python | Get dictionary keys as a list
- Python | Remove spaces from dictionary keys
- Python | Initialize a dictionary with only keys from a list
- Python | Ways to change keys in dictionary
- Python | Find keys with duplicate values in dictionary
- Python program to Swap Keys and Values in Dictionary
- Python | Combine two dictionary adding values for common keys
- Python | Split dictionary keys and values into separate lists
- Python | Check whether given key already exists in a dictionary
- Python dictionary, set and counter to check if frequencies can become same
- Python Dictionary | Check if binary representations of two numbers are anagram
- Python | Convert flattened dictionary into nested dictionary
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
