ascii_letters + string.digits ...: s = [random.choice(chars) for i in range(length)] ...: f.write('{0}\n'.format(''.join(s))) ...: f.close() ...: ...: ...: if __name__ == '__main__': ...: rand_str(200) ...: 生成了一个Activation_code.txt文件,如图: ...
In [3]: import random,stringIn [4]: def rand_str(num, length=7):...: f = open('Activation_code.txt', 'w')...: for i in range(num):...: chars = string.ascii_letters + string.digits...: s = [random.choice(chars) for i in range(length)]...: f.write('{0}\n'.for...
String模块是Python中的一个标准库,提供了与字符串相关的一些常用函数和常量。其中,ascii_letters和digits是两个常量,用于表示ASCII字符集中的字母和数字。 ascii_letters常量包含了所有的ASCII大小写字母,即包括了从a到z和A到Z的所有字符。 digits常量包含了所有的数字字符,即从0到9的所有字符。 这两个常量在字符...
In[3]:importrandom,stringIn[4]:defrand_str(num,length=7):...:f=open('Activation_code.txt','w')...:foriinrange(num):...:chars=string.ascii_letters+string.digits...:s=[random.choice(chars)foriinrange(length)]...:f.write('{0}\n'.format(''.join(s)))...:f.close()...:...
chars= string.ascii_letters +string.digits s= [random.choice(chars)foriinrange(length)] f.write('{0}\n'.format(''.join(s))) f.close()if__name__=='__main__': rand_str(200) 执行结果片段: wz0dajI 25vlulV zLHkx9Y GGzu0Ip ...
>>> code1 = 'for i in range(0,10): print (i)' >>> compile1 = compile(code1,'','exec') >>> exec (compile1) 0 1 2 3 4 5 6 7 8 9 >>> #简单求值表达式用eval >>> code2 = '1 + 2 + 3 + 4' >>> compile2 = compile(code2,'','eval') ...
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We don't log data All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is ...
for i in range(1,1001): lenght = len(str(i)) numsum =0 for j in str(i): numsum+=int(j)**lenght if numsum==i: print(f'{i}是阿姆斯特朗数') 1. 2. 3. 4. 5. 6. 7. split切割 将字符串按照指定的符号进行切割,没有被切掉的元素被添加到一个列表中 ...
import string import random length=7 #验证码长度 number=20 #生产验证码的个数 chars=string.digits+string.ascii_letters for i in range(number): s='' for i in range ( length ) : s += random . choice ( chars ) print(s)