Python Program to Construct dictionary using random values

Given List, our task is to write a Python program to construct a dictionary with values randomly selected from range.

Examples:

Input : test_list = ["Gfg", "is", "Best"], i, j = 2, 9
Output : {'Gfg': 3, 'is': 9, 'Best': 4}
Explanation : Random values assigned between 2 and 9.

Input : test_list = ["Gfg", "is", "Best"], i, j = 2, 10
Output : {'Gfg': 3, 'is': 9, 'Best': 10}
Explanation : Random values assigned between 2 and 10.

Method #1 : Using randint() + loop

In this, we iterate through each element in list and assign random number selected using randint() to construct key value pair dictionary.

Output:

The original list is : [‘Gfg’, ‘is’, ‘Best’]

Random range initialized dictionary : {‘Gfg’: 5, ‘is’: 7, ‘Best’: 8}

Method #2 : Using dictionary comprehension + randint()

In this, we perform task in similar manner as above method, only difference being dictionary comprehension is used to assign dictionary in shorthand manner.

Output:

The original list is : [‘Gfg’, ‘is’, ‘Best’]

Random range initialized dictionary : {‘Gfg’: 4, ‘is’: 2, ‘Best’: 6}

Method #3: Using zip() and map()

Step-by-step approach:

1. Import the randint() function from the random module.
2. Define a list of strings test_list.
3. Define the range [i,j] for the random values to be generated.
4. Print the original list test_list.
5. Use map() and a lambda function to generate random values for each index in test_list.
6. Use zip() to combine test_list with the list of random values generated in step 5 into a dictionary res.
7. Print the resulting dictionary res.

The original list is : ['Gfg', 'is', 'Best']
Random range initialized dictionary : {'Gfg': 6, 'is': 4, 'Best': 6}

Time complexity: O(n), where n is the length of the list
Auxiliary Space: O(n), since the largest data structure used in the code is the dictionary res with n key-value pairs.

Method #4: Using randrange() function:

• Importing the randrange() function from the random module to generate random integers within a given range.
• Initializing a list of strings and printing the original list.
• Initializing the range limits to generate random values.
• Using dictionary comprehension to iterate through the list and generate a dictionary with each element as the key and a random integer between i and j as the value.
• Assigning the resulting dictionary to a variable res.
• Printing the resulting dictionary.

The original list is : ['Gfg', 'is', 'Best']
Random range initialized dictionary : {'Gfg': 4, 'is': 8, 'Best': 3}

Time Complexity: O(n), where n is the length of the list
Auxiliary Space: O(n), since the largest data structure used in the code is the dictionary res with n key-value pairs.