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Python | Dictionary has_key ()

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In a Python dictionary, the has_key() method returns true if the specified dictionary is present in the dictionary, otherwise it returns false.

Syntax: dict.has_key (key)

Parameters:

  • key - This is the Key to be searched in the dictionary.

Returns: Method returns true if a given key is available in the dictionary, otherwise it returns a false.

Example # 1:

# Python program to show the work
# of the has_key () method in the dictionary

 
# A three-subject dictionary

Dictionary1 = { ’A’ : ’Geeks’ , ’ B’ : ’For’ , ’ C’ : ’Geeks’ }

 
# Dictionary to check

print ( "Dictionary to be checked:" )

print (Dictionary1)

 
# Using has_key () to check
# for the presence of a key in the dictionary

print (Dictionary1.has_key ( ’A’ ))

print (Dictionary1.has_key ( ’For’ ))

Exit :

 Dictionary to be checked: {’A’:’ Geeks’, ’C’:’ Geeks’, ’B’ : ’For’} True False 

Example # 2:

# Python program to show the work
# of the has_key () method in the dictionary

 
# Three-subject dictionary

Dictionary2 = { 1 : ’Welcome ’ , 2 : ’To’ , 3 : ’Geeks’ }

  
# Dictionary to check

print ( "Dictionary to be checked:" )

print (Dictionary2)

 
# Using has_key () to check
# for the presence of the key in the dictionary

print (Dictionary2.has_key ( 1 ))

print (Dictionary2.has_key ( ’To’ )) 

Output:

 Dictionary to be checked: {1: ’Welcome’, 2:’ To’, 3: ’Geeks’} True False 

Python | Dictionary has_key () __dict__: Questions

Python | Dictionary has_key () has_key: Questions

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