How To Use Shuffle Function In Python

The Python random module shuffle() method shuffles all elements of a list in random order. This article will introduce how to use the random module shuffle() method in Python with examples.

1. Python Random Module Shuffle Method Introduction.

  1. The shuffle() method usage syntax.
    # import the python random module
    import random
    
    # invoke the random module's shuffle method and pass a python list object.
    random.shuffle(list
    
  2. The shuffle() method argument can be a list or a tuple object.
  3. The shuffle() method will randomly sort the elements in the list object.

2. Use Python Random Module Shuffle Mehotd To Shuffle List Elements In Random Order Example.

  1. Shuffle integer number list example.
    >>> list = [1,2,3,4,5,6,7,8,9,10]
    >>> 
    >>> print(list)
    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
    >>> 
    >>> random.shuffle(list)
    >>> 
    >>> print(list)
    [4, 5, 10, 1, 8, 3, 7, 6, 2, 9]
    >>> 
    >>> random.shuffle(list)
    >>> 
    >>> print(list)
    [3, 8, 2, 1, 5, 9, 4, 6, 7, 10]
    >>> 
    
  2. Shuffle string list example.
    >>> import random
    >>> 
    >>> list = ['I', 'love', 'python']
    >>> 
    >>> print(list)
    ['I', 'love', 'python']
    >>> 
    >>> random.shuffle(list)
    >>> 
    >>> print(list)
    ['python', 'I', 'love']
    >>> 
    
  3. You can not shuffle a python tuple object. If you pass a tuple object to random.shuffle method, it will throw TypeError: ‘tuple’ object does not support item assignment.
    >>> print(tuple)
    ('I', 'love', 'java')
    >>> 
    >>> random.shuffle(tuple)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/random.py", line 278, in shuffle
        x[i], x[j] = x[j], x[i]
    TypeError: 'tuple' object does not support item assignment
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