Python Random Module Example

Source: Internet
Author: User
Tags function prototype shuffle

The most recent use of random numbers, the query data summarizes the Python random module (get random number) common methods and use examples.


Random.random () is used to generate a random number of 0 to 1 points: 0 <= N < 1.0

Random.uniform (A, b), used to generate a random number of characters in a specified range, two parameters one of which is the upper bound, and the other is the lower limit.

If a < b, the generated random number n:b>= n >= A.

If a >b, then the generated random number n:a>= n >= B.

Print Random.uniform (10, 20)
Print Random.uniform (20, 10)
# 14.73
# 18.579

Random.randint (A, b), used to generate an integer within a specified range. Where parameter A is the lower limit, parameter B is the upper limit, the generated random number n:a <= n <= B

Print Random.randint (1, 10)

4, Random.randrange
Random.randrange ([start], stop[, step]), from within the specified range, gets a random number in the collection incremented by the specified cardinality.

such as: Random.randrange (10, 100, 2), the result is equivalent from [10, 12, 14, 16, ... 96, 98] gets a random number in the sequence.

5, Random.choice
Random.choice gets a random element from the sequence. Its function prototype is: Random.choice (sequence). The parameter sequence represents an ordered type.

Here's a note: sequence is not a specific type in Python, but a series of types. list, tuple, string all belong to sequence.

Print Random.choice ("Python")
Print Random.choice (["Jgood", "is", "a", "handsome", "boy"])
Print Random.choice (("Tuple", "List", "Dict")

6, Random.shuffle
Random.shuffle (x[, Random]), which is used to disrupt elements in a list.

Such as:

p = [' Python ', ' is ', ' powerful ', ' simple ', ' and so ' on ... ']
Random.shuffle (P)
Print P
# [' Powerful ', ' simple ', ' was ', ' Python ', ' and so on ... ']

7, Random.sample
Random.sample (sequence, k), randomly fetching fragments of the specified length from the specified sequence. The sample function does not modify the original sequence.

For example:

list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10,11,12]
Slice = random.sample (list, 6) # randomly fetches 6 elements from the list, returning as a fragment
Print Slice
Print List # The original sequence has not changed

Python Random Module Example

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