Python Dict.has_key () method

Dict.has_key()方法

Python dictionary (Dictionary) has_key () function is used to determine whether a key exists in the dictionary, if the key is in the dictionary dict returns true, otherwise returns false.

has_key () method syntax: dict . has_key ( Key )

　　* Key - key to find in the dictionary.

　　* If the key is in the dictionary returns true, otherwise false.

Example:

The following examples illustrate has_key () function using the method:

#!/usr/bin/python
dict = {'Name': 'Zara', 'Age': 7} print "Value : %s" % dict.has_key('Age') print "Value : %s" % dict.has_key('Sex')

The results: 
Value : True    
Value : False  

Another note:

 the Python 3.X is not included in has_key () function is __contains __ (key) Alternative:
dict3={'name':'Z','Age':. 7 , 'class' : 'First' };  
Print ( "Value:" , dict3 . __contains__ ( 'name' )) 
Print ( "Value:" , dict3 . __contains__ ( 'Sex' ))
 execution results:
Value:True   
Value:False  

reference Links:https://www.runoob.com/python/att-dictionary-has_key.html