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link管理  ›  random.shuffle() function in Python - GeeksforGeeks
python shuffle random
https://www.geeksforgeeks.org/random-shuffle-function-in-python/
瘦瘦的小摩托
6 月前

The shuffle() is an inbuilt method of the random module. It is used to shuffle a sequence (list). Shuffling a list of objects means changing the position of the elements of the sequence using Python .

Syntax of random.shuffle()

The order of the items in a sequence, such as a list, is rearranged using the shuffle() method. This function modifies the initial list rather than returning a new one.

Syntax: random.shuffle(sequence, function)

Parameters:

  • sequence : can be a list
  • function : optional and by default is random(). It should return a value between 0 and 1.

    • Returns: nothing

    Python random.shuffle() function to shuffle list

    Example 1:

    Python3

    After the second shuffle : ['C', 'E', 'B', 'D', 'A']

    The shuffle() method cannot be used to shuffle immutable DataTypes like strings.

    Example 2:

    Python3

    sample_list = [ 'A' , 'B' , 'C' , 'D' , 'E' ]
    print ( "Original list : " )
    print (sample_list)
    # as sample_function returns the same value
    # each time, the order of shuffle will be the
    # same each time
    random.shuffle(sample_list, sample_function)
    print ( "\nAfter the first shuffle : " )
    print (sample_list)
    sample_list = [ 'A' , 'B' , 'C' , 'D' , 'E' ]
    random.shuffle(sample_list, sample_function)
    print ( "\nAfter the second shuffle : " )
    print (sample_list)
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