Generate a list of strings from another list using python random and eliminate duplicates-CodePudding

I have the following list:

original_list = [('Anger', 'Envy'), ('Anger', 'Exasperation'), ('Joy', 'Zest'), ('Sadness', 'Suffering'), ('Joy', 'Optimism'), ('Surprise', 'Surprise'), ('Love', 'Affection')]

I am trying to create a random list comprising of the 2nd element of the tuples (of the above list) using the random method in such a way that duplicate values appearing as the first element are only considered once.

That is, the final list I am looking at, will be:

random_list = [Exasperation, Suffering, Optimism, Surprise, Affection]

So, in the new list random_list, strings Envy and Zest are eliminated (as they are appearin the the original list twice). And the process has to randomize the result, i.e. with each iteration would produce a different list of Five elements.

May I ask somebody to show me the way how may I do it?

CodePudding user response：

d={}  # an empty dictionary
original_list = [('Anger', 'Envy'), ('Anger', 'Exasperation'), ('Joy', 'Zest'), ('Sadness', 'Suffering'), ('Joy', 'Optimism'), ('Surprise', 'Surprise'), ('Love', 'Affection')]
for y in original_list:
    d[y[0]]=y[1]

print(d)
#{'Anger': 'Exasperation', 'Joy': 'Optimism', 'Sadness': 'Suffering', 'Surprise': 'Surprise', 'Love': 'Affection'}

random_list=[x for x in d.values()]

output
#['Exasperation', 'Optimism', 'Suffering', 'Surprise', 'Affection']

CodePudding user response：

You can use dictionary to filter the duplicates from original_list (shuffled before with random.sample):

import random

original_list = [
    ("Anger", "Envy"),
    ("Anger", "Exasperation"),
    ("Joy", "Zest"),
    ("Sadness", "Suffering"),
    ("Joy", "Optimism"),
    ("Surprise", "Surprise"),
    ("Love", "Affection"),
]

out = list(dict(random.sample(original_list, len(original_list))).values())
print(out)

Prints (for example):

['Optimism', 'Envy', 'Surprise', 'Suffering', 'Affection']