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Python random.shuffle() Function Guide
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- Basic Usage
- random.shuffle() changes the order of list items in place
- Function takes sequence x and optional random float parameter
- Default random function is random.random()
- Returns None, modifying original sequence
- Shuffling Methods
- Make copy of original list before shuffling (ideal)
- Use random.sample() to shuffle without modifying original
- NumPy multidimensional arrays can be shuffled using numpy.random.shuffle()
- Special Cases
- Strings cannot be shuffled directly, must be converted to list
- Range of integers must be converted to list before shuffling
- Dictionaries cannot be shuffled directly, only keys can be rearranged
- Generator objects require conversion to list before shuffling
- Advanced Features
- Same result can be achieved by using seed() function
- Python's random module is pseudo-random, uses system time as seed
- Long sequences may not generate all possible permutations