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Random.Choices() method in Python

  • Difficulty Level : Expert
  • Last Updated : 17 May, 2020

The choices() method returns multiple random elements from the list with replacement. You can weigh the possibility of each result with the weights parameter or the cum_weights parameter. The elements can be a string, a range, a list, a tuple or any other kind of sequence.

Syntax : random.choices(sequence, weights=None, cum_weights=None, k=1)

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Parameters :
1. sequence is a mandatory parameter that can be a list, tuple, or string.
2. weights is an optional parameter which is used to weigh the possibility for each value.
3. cum_weights is an optional parameter which is used to weigh the possibility for each value but in this the possibility is accumulated
4. k is an optional parameter that is used to define the length of the returned list.



Note: This method is different from random.choice().

Example:




import random
  
mylist = ["geeks", "for", "python"]
  
print(random.choices(mylist, weights = [10, 1, 1], k = 5))

Note: Every time output will be different as the system returns random elements.
Output:

['geeks', 'geeks', 'geeks', 'for', 'for']

Practical application: Print a random list with 6 items.




import random
  
mylist = ["apple", "banana", "mango"]
  
print(random.choices(mylist, weights = [10, 1, 1], k = 6))

Note: The output changes every time as choices() function is used.
Output:

['apple', 'banana', 'apple', 'apple', 'apple', 'banana']



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