Python dictionary with keys having multiple inputs

Prerequisite : Python-Dictionary.

How to create a dictionary where a key is formed using inputs?
Let us consider an example where have an equation for three input variables, x, y and z. We want to store values of equation for different input triplets.

Example 1:

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# Python code to demonstrate a dictionary
# with multiple inputs in a key.
import random as rn
  
# creating an empty dictionary
dict = {}
  
# Insert first triplet in dictionary
x, y, z = 10, 20, 30
dict[x, y, z] = x + y - z;
  
# Insert second triplet in dictionary
x, y, z = 5, 2, 4
dict[x, y, z] = x + y - z;
  
# print the dictionary
print(dict)

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Example 2: Let’s get access to the keys.

Let us consider a dictionary where longitude and latitude are the keys and the place to which they belong to is the value.











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# dictionary containing longitude and latitude of places 


places = {("19.07'53.2", "72.54'51.0"):"Mumbai", \ 


          ("28.33'34.1", "77.06'16.6"):"Delhi"} 


  


print(places) 


print('\n') 


  


# Traversing dictionary with multi-keys and crearing 


# different lists from it 


lat = [] 


long = [] 


plc = [] 


for i in places: 


    lat.append(i[0]) 


    long.append(i[1]) 


    plc.append(places[i[0], i[1]]) 


  


print(lat) 


print(long) 


print(plc) 



















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Now that the keys(latitude, longitude) and values(place) are stored in a list, we can access it easily.



          
          
          
          

            

    

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