﻿ Python: Generate the unique combinations - w3resource

# Python: Generate the unique combinations

## Python Itertools: Exercise-27 with Solution

Create a Python program that chooses a specified number of colors from three different colors and generates unique combinations.

Sample Solution:

Python Code:

from itertools import combinations
def unique_combinations_colors(list_data, n):
return [" and ".join(items) for items in combinations(list_data, r=n)]
colors = ["Red","Green","Blue"]
print("Original List: ",colors)
n=1
print("\nn = 1")
print(list(unique_combinations_colors(colors, n)))
n=2
print("\nn = 2")
print(list(unique_combinations_colors(colors, n)))
n=3
print("\nn = 3")
print(list(unique_combinations_colors(colors, n)))

Sample Output:

Original List:  ['Red', 'Green', 'Blue']

n = 1
['Red', 'Green', 'Blue']

n = 2
['Red and Green', 'Red and Blue', 'Green and Blue']

n = 3
['Red and Green and Blue']

Python Code Editor:

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## Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

def tips_collect_dictionary(obj):
inv_obj = {}
for key, value in obj.items():
inv_obj.setdefault(value, list()).append(key)
return inv_obj
ages = {
"Owen": 25,
"Jhon": 25,
"Pepe": 15,
}
print(tips_collect_dictionary(ages))

Output:

{25: ['Owen', 'Jhon'], 15: ['Pepe']}

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