I get TypeError: choice() got an unexpected keyword argument 'k' , when using python random.choice

Question

我想在给定的字母表上生成长度为 n 的随机字符串。

import random
alphabet = "ACTG"
n= 10
# print(''.join(random.choice(alphabet) for x in range(n)) ) # work fine

print(''.join(random.choice(alphabet, k=n))) # doesn't work

错误：

Traceback (most recent call last):
  File "<input>", line 3, in <module>
TypeError: choice() got an unexpected keyword argument 'k'

Answer 1

正确的方法是choices和s，所以使用random.choices .
错误来自具有相似名称的两个函数。第一个是 random.choices with s，第二个是 random.choice 没有 s.

import random
alphabet = "ACTG"
n= 10

# print(''.join(random.choice(alphabet, k=n))) # gives an error
print(''.join(random.choices(alphabet, k=n))) # the correct method, work fine