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Pythonを使ってランダムな文字列を生成

Last updated at Posted at 2018-02-20
目的

文字数nを与えるとその長さのランダムな英数字の文字列を作成する.

環境
$ python
Python 3.6.2 |Anaconda custom (64-bit)| (default, Jul 20 2017, 13:14:59)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

(追記) Python 2.7.14でも動きました.

コード
import random, string

def randomname(n):
   randlst = [random.choice(string.ascii_letters + string.digits) for i in range(n)]
   return ''.join(randlst)
生成例
>>> randomname(10)
'hBJN0XntN6'
>>> randomname(10)
'7we4CMGjTj'
>>> randomname(8)
'JRBLZVEG'
>>> randomname(8)
'woccb8Vn'
追記

@tag1216 さんからの補足です.
ありがとうございました.

import random, string

def randomname(n):
   return ''.join(random.choices(string.ascii_letters + string.digits, k=n))

Python 3.6以降であれば上記で同じ処理が可能です.
(追記: コード間違ってたので修正および加筆しました)

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