Python program to multiply all the items in a dictionary

Python program to illustrate multiplying all the items in a dictionary could be done by creating a dictionary that will store all the key-value pairs, multiplying the value of all the keys, and storing it in a variable.

Example:

Input: dict = {‘value1’:5, ‘value2’:4, ‘value3’:3, ‘value4’:2, ‘value5’:1} 
Output: ans = 120 

Input: dict = {‘v1’:10, ‘v2’:7, ‘v3’:2} 
Output: ans = 140

Approach 1:

• Create a dictionary d and store key-value pairs in it.
• Create a variable answer initialized to 1.
• Run a loop to traverse through the dictionary d
• Multiply each value of key with answer and store the result in answer itself.
• Print answer.

Below are the examples of above approach.

Example 1:

120

Time complexity: O(n), where n is the number of elements in the dictionary.
Auxiliary space: O(1), as only a single variable is used to store the result.

Example 2:

140

Approach 2: Using values() and list() methods

120

Time Complexity: O(n), where n is the number of key-value pairs in the dictionary. 

Auxiliary Space Complexity: O(1), as the amount of additional space used is constant regardless of the size of the input. 

Approach 3: Using functools.reduce(), operator.mul

120

Time complexity: O(n), where n is the number of key-value pairs in the dictionary.

Auxiliary space: O(n), where n is the number of key-value pairs in the dictionary.