The random module in Python is used to generate random numbers.
The following describes the functions of the random module in detail:
1.random.random()
# used to generate a 0 to 1
Random float: 0 <= n < 1.0
1 import random
2 a = random.random()
3 print (a)
2.random.uniform(a,b)
#Used to generate a random number of symbols within a specified range, one of the two parameters is the upper limit and the other is the lower limit. If a > b, the generated random number n: a <= n <= b. If a < b, then b <= n <= a.
1 import random
2 print(random.uniform(1,10))
3 print(random.uniform(10,1))
3.random.randint(a, b)
#Used to generate an integer in the specified range. Where parameter a is the lower limit, parameter b is the upper limit, the generated random number n: a <= n <= b
1 import random
2 print(random.randint(1,10))
4.random.randrange ([start], stop [, step])
#Get a random number from the set incremented by the specified base within the specified range.
random.randrange(10, 30, 2), the result is equivalent to getting a random number from the sequence [10, 12, 14, 16, ... 26, 28].
random.randrange(10, 30, 2) is equivalent in result to random.choice(range(10, 30, 2).
1 import random
2 print (random.randrange (10,30,2))
5.random.choice(sequence)
# random.choice gets a random element from the sequence. Its function prototype is: random.choice(sequence).
The parameter sequence represents an ordered type. Here to explain: sequence is not a specific type in python, but refers to a series of types. list, tuple, and string all belong to sequence.
1 import random
2 lst = ['python','C','C++','javascript']
3 str1 = ('I love python')
4 print(random.choice(lst))
5 print(random.choice(str1))
6.random.shuffle(x[, random])
#Used to shuffle the elements in a list, that is to randomly arrange the elements in the list.
1 import random
2 p = ['A' , 'B', 'C', 'D', 'E' ]
3 random.shuffle(p)
4 print (p)
7.random.sample(sequence, k)
#从指定序列中随机获取指定长度的片断并随机排列。注意：sample函数不会修改原有序列。
1 import random
2 lst = [1,2,3,4,5]
3 print(random.sample(lst,4))
4 print(lst)
