How to generate random numbers in Python_python

This article mainly introduces the method of generating random numbers in Python. Friends in need can refer to it

If you are interested in the relationship between generating random numbers in Python and the most commonly used functions in the random module. If you don’t understand, the following article is about the relationship between Python’s random number generation and the most commonly used functions in the random module. I hope you will gain something. The following is the introduction to this article.

random.random() is used to generate

is used to generate a random number of character points within a specified range. One of the two parameters is the upper limit and the other is the lower limit. If a > b, generate a random number

n: a <= n <= b。如果 a <b， 则 b <= n <= a。

print random.uniform(10, 20) 
print random.uniform(20, 10) 
#---- 
#18.7356606526 
#12.5798298022 
random.randint

is used to generate a random number within the specified range integer. The parameter a is the lower limit, and the parameter b is the upper limit. Python generates random numbers

print random.randint(12, 20) #生成的随机数n: 12 <= n <= 20 
print random.randint(20, 20) #结果永远是20 
#print random.randint(20, 10) #该语句是错误的。

The lower limit must be less than the upper limit.

random.randrange

From the set within the specified range, incremented by the specified base, this article is a partial introduction to the application of python to generate random numbers.

Random integer:
>>> import random
>>> random.randint(0,99)
21

Randomly select 0 Even numbers between 100 and 100:
>>> import random
>>> random.randrange(0, 101, 2)
42

Random floating point number:
>>> import random
>>> random.random()
0.85415370477785668
>>> random.uniform(1, 10)
5.4221167969800881

Random characters:
>>> import random
>>> random.choice('abcdefg%^*f')
'd'

Select a specific number of characters from multiple characters:
>>> import random
random.sample('abcdefghij',3)
['a', 'd', ' b']

Select a specific number of characters from multiple characters to form a new string:
>>> import random
>>> import string
> >> string.join(random.sample(['a','b','c','d','e','f','g','h','i',' j'], 3)).r
eplace(" ","")
'fih'

Randomly select a string:
>>> import random
>>> random.choice (['apple', 'pear', 'peach', 'orange', 'lemon'] )
'lemon'

Shuffle:
>>> import random
>>> items = [1, 2, 3, 4, 5, 6]
>>> random.shuffle(items)
>>> items
[3, 2, 5, 6, 4, 1]

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Related recommendations:

php Three ways to generate random numbers Code example

php?Generate random number solution

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