如何生成大小为N的字符串,由数字和大写英文字母组成,例如:

6个754z4英国U911K4型


当前回答

使用Numpy的随机choice()函数

import numpy as np
import string        

if __name__ == '__main__':
    length = 16
    a = np.random.choice(list(string.ascii_uppercase + string.digits), length)                
    print(''.join(a))

文档在这里http://docs.scipy.org/doc/numpy-1.10.0/reference/generated/numpy.random.choice.html

其他回答

import string
from random import *
characters = string.ascii_letters + string.punctuation  + string.digits
password =  "".join(choice(characters) for x in range(randint(8, 16)))
print password

我发现这更简单、更干净。

str_Key           = ""
str_FullKey       = "" 
str_CharacterPool = "01234ABCDEFfghij~>()"
for int_I in range(64): 
    str_Key = random.choice(str_CharacterPool) 
    str_FullKey = str_FullKey + str_Key 

只需更改64以更改长度,更改CharacterPool以仅使用字母数字、仅使用数字或奇怪的字符或任何您想要的字符。

我想建议您下一个选择:

import crypt
n = 10
crypt.crypt("any sring").replace('/', '').replace('.', '').upper()[-n:-1]

妄想模式:

import uuid
import crypt
n = 10
crypt.crypt(str(uuid.uuid4())).replace('/', '').replace('.', '').upper()[-n:-1]

使用此代码可以快速生成一个重复的随机文本值字符串:

import string
import random

def id_generator(size=6, chars=string.ascii_uppercase + string.digits):
    return ''.join(random.choice(chars) for _ in range(size))

moja_lista = []
for a in range(20):
    moja_lista.append(id_generator(3, "3etrY"))

你会得到20个重复的随机文本值。生成器从集合“3etrY”集合生成三个组成元素。一切都可以根据您的喜好进行设置。

print(len(moja_lista))
moja_lista

一种无重复的随机生成器函数,使用一个集合来存储以前生成的值。注意,如果字符串或数量非常大,这将消耗一些内存,而且可能会稍微慢一点。发电机将在给定量或达到最大可能组合时停止。

代码:

#!/usr/bin/env python

from typing import Generator
from random import SystemRandom as RND
from string import ascii_uppercase, digits


def string_generator(size: int = 1, amount: int = 1) -> Generator[str, None, None]:
    """
    Return x random strings of a fixed length.

    :param size: string length, defaults to 1
    :type size: int, optional
    :param amount: amount of random strings to generate, defaults to 1
    :type amount: int, optional
    :yield: Yield composed random string if unique
    :rtype: Generator[str, None, None]
    """
    CHARS = list(ascii_uppercase + digits)
    LIMIT = len(CHARS) ** size
    count, check, string = 0, set(), ''
    while LIMIT > count < amount:
        string = ''.join(RND().choices(CHARS, k=size))
        if string not in check:
            check.add(string)
            yield string
            count += 1


for my_count, my_string in enumerate(string_generator(6, 20)):
    print(my_count, my_string)

输出:

0 RS9N3P
1 S0GDGR
2 ZNBLFV
3 96FF97
4 38JJZ3
5 Q3214A
6 VLWNK1
7 QMT05E
8 X1ZFP0
9 MZF442
10 10L9AZ
11 GE8HIQ
12 S7PA43
13 MVLXO9
14 YX7Y0G
15 GIIKPF
16 3KCUQA
17 XHIXFV
18 BJQ5VG
19 HQF01Q

如果字符串始终需要包含字母和数字,请使用以下命令:

#!/usr/bin/env python

from typing import Generator
from random import SystemRandom as RND
from string import ascii_uppercase, digits


def string_generator(size: int = 2, amount: int = 1) -> Generator[str, None, None]:
    """
    Return x random strings of a fixed length.

    :param size: string length, defaults to 1
    :type size: int, optional
    :param amount: amount of random strings to generate, defaults to 1
    :type amount: int, optional
    :yield: Yield composed random string if unique
    :rtype: Generator[str, None, None]
    """
    if size < 2:
        print(
            'Since the string must contain letters and numbers,',
            'its size must be at least two characters',
        )
        return
    CHARS = list(ascii_uppercase + digits)
    LIMIT = len(CHARS) ** size
    count, check, string = 0, set(), ''
    while LIMIT > count < amount:
        while 1:
            string = ''.join(RND().choices(CHARS, k=size))
            if not (string.isalpha() or string.isnumeric()):
                break
        if string not in check:
            check.add(string)
            yield string
            count += 1


for my_count, my_string in enumerate(string_generator(6, 20)):
    print(my_count, my_string)

输出:

0 5JIITL
1 3W7AI1
2 8QMO10
3 ETHAI8
4 BLFPP9
5 50X2CC
6 1LI8WA
7 39CKET
8 R4IM0E
9 Q3KHGS
10 65CBIU
11 XTRHO4
12 N2XIGO
13 06VFCW
14 VE9MJ8
15 A9ADHK
16 Y5ROJ0
17 OH7EJF
18 TQ709S
19 P0DDNJ