Python 3 中的常用的random 生成随机数

Python 3 中的随机数

Python

Python 3.6.8 |Anaconda, Inc.| (default, Dec 29 2018, 19:04:46) Type 'copyright', 'credits' or 'license' for more information IPython 6.4.0 -- An enhanced Interactive Python. Type '?' for help. PyDev console: using IPython 6.4.0 Python 3.6.8 |Anaconda, Inc.| (default, Dec 29 2018, 19:04:46) [GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin lst = list(range(1,11)) lst Out[3]: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] import random

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Python 3.6.8 | Anaconda , Inc . | ( default , Dec 29 2018 , 19 : 04 : 46 ) Type 'copyright' , 'credits' or 'license' for more information IPython 6.4.0 -- An enhanced Interactive Python . Type '?' for help . PyDev console : using IPython 6.4.0 Python 3.6.8 | Anaconda , Inc . | ( default , Dec 29 2018 , 19 : 04 : 46 ) [ GCC 4.2.1 Compatible Clang 4.0.1 ( tags / RELEASE_401 / final ) ] on darwin lst = list ( range ( 1 , 11 ) ) lst Out [ 3 ] : [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ] import random

choice 从特定的序列找到随机值

Python

random.choice(lst) Out[6]: 9 random.choice(lst) Out[7]: 9 random.choice(lst) Out[8]: 4

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random . choice ( lst ) Out [ 6 ] : 9 random . choice ( lst ) Out [ 7 ] : 9 random . choice ( lst ) Out [ 8 ] : 4

sample 随机取几个值呢

Python

random.sample(lst,3) Out[10]: [8, 5, 9] random.sample(lst,3) Out[11]: [1, 7, 5] lst Out[12]: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

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random . sample ( lst , 3 ) Out [ 10 ] : [ 8 , 5 , 9 ] random . sample ( lst , 3 ) Out [ 11 ] : [ 1 , 7 , 5 ] lst Out [ 12 ] : [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]

shuffle 打乱序列

Python

random.shuffle(lst) lst Out[15]: [8, 9, 6, 1, 2, 10, 4, 7, 3, 5] lst Out[16]: [8, 9, 6, 1, 2, 10, 4, 7, 3, 5] random.shuffle(lst) lst Out[18]: [8, 2, 7, 3, 4, 9, 1, 6, 10, 5]

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random . shuffle ( lst ) lst Out [ 15 ] : [ 8 , 9 , 6 , 1 , 2 , 10 , 4 , 7 , 3 , 5 ] lst Out [ 16 ] : [ 8 , 9 , 6 , 1 , 2 , 10 , 4 , 7 , 3 , 5 ] random . shuffle ( lst ) lst Out [ 18 ] : [ 8 , 2 , 7 , 3 , 4 , 9 , 1 , 6 , 10 , 5 ]

randint 随机产生一个整数

Python

random.randint(1,10) Out[20]: 2 random.randint(1,10) Out[21]: 6

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random . randint ( 1 , 10 ) Out [ 20 ] : 2 random . randint ( 1 , 10 ) Out [ 21 ] : 6

random 随机一个浮点数

Python

random.random() Out[23]: 0.22997267397847143 random.random() Out[24]: 0.8845062988632815 random.random() Out[25]: 0.14172742043242093

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random . random ( ) Out [ 23 ] : 0.22997267397847143 random . random ( ) Out [ 24 ] : 0.8845062988632815 random . random ( ) Out [ 25 ] : 0.14172742043242093

getrandbits 获取特定比特位的 数值

Python

random.getrandbits(10) Out[27]: 309 random.getrandbits(10) Out[28]: 813

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random . getrandbits ( 10 ) Out [ 27 ] : 309 random . getrandbits ( 10 ) Out [ 28 ] : 813

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