how to get the key for a value in a dictionary in python

1
2# function to return key for any value 
3def get_key(val): 
4    for key, value in my_dict.items(): 
5         if val == value: 
6             return key 
7  
8    return "key doesn't exist"
9  
10# Driver Code 
11  
12my_dict ={"java":100, "python":112, "c":11} 
13  
14print(get_key(100)) 
15print(get_key(11)) 
16