隨機驗證碼產生（python實現）

標籤：

需求：產生隨機不重複驗證碼。

代碼：

#!/usr/bin/env python# encoding: utf-8"""@author: 俠之大者kamil@file: 200number.py@time: 2016/4/13 23:33"""import random,stringdef rand_str(num,length = 7):    f = open("Activation_code2.txt","wb")    for i in range(num):        chars = string.ascii_letters + string.digits        s = [random.choice(chars) for i in range(length)]        f.write(bytes((‘‘.join(s)  + ‘\n‘ ), ‘utf-8‘)) #f.write(‘‘.join(s) + ‘\n‘)   py2    f.close()if __name__=="__main__":    rand_str(200)

會逐行寫在檔案裡，涉及知識點：f.open  f.writer random

#’str’ does not support the buffer interface  在python3 報錯with open("test.txt") as fp:    line = fp.readline()with open("test.out", ‘wb‘) as fp:    fp.write(line)#解決方案1  在Python3x中需要將str編碼,with open("test.txt") as fp:    line = fp.readline()with open("test.out", ‘wb‘) as fp:    fp.write(bytes(line, ‘utf-8‘))#解決方案2 不想用b(binary)模式寫入，那麼用t(text, 此為寫入的預設模式)模式寫入可以避免這個錯誤.with open("test.txt") as fp:    line = fp.readline()with open("test.out", ‘wt‘) as fp:# with open("test.out", ‘w‘) as fp:    fp.write(line)

 

隨機驗證碼產生（python實現）