Python: Extract a given number of randomly selected elements from a given list
Python List: Exercise - 81 with Solution
Write a Python program to extract a given number of randomly selected elements from a given list.
Sample Solution:
Python Code:
import random
def random_select_nums(n_list, n):
return random.sample(n_list, n)
n_list = [1,1,2,3,4,4,5,1]
print("Original list:")
print(n_list)
selec_nums = 3
result = random_select_nums(n_list, selec_nums)
print("\nSelected 3 random numbers of the above list:")
print(result)
Sample Output:
Original list: [1, 1, 2, 3, 4, 4, 5, 1] Selected 3 random numbers of the above list: [4, 4, 1]
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Previous: Write a Python program to insert an element at a specified position into a given list.
Next: Write a Python program to generate the combinations of n distinct objects taken from the elements of a given list.
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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