python练手程序_100个python练手小程序

1.生成200个指定长度的随机码

import random

import string

def rand_str(num,len=7):

f = open('file.txt','w')

count = 1

for i in range(num):

restr = ''

chars = string.ascii_lowercase+ string.digits

for i in range(len):

restr += random.choice(chars)

f.write( str(count)+ ' ' + restr +'\n')

count += 1

f.close()

if __name__ == '__main__':

rand_str(200,20)

知识点：

1.随机取值：

random.choice

2.w是写入，wb就是写入二进制文件了。

f = open('file.txt','w')

3.int转为str

str(count)

二、把1中生成的随机码存到数据库中

#-*- coding:utf-8 -*-

'''

02

'''

import string

import random

import pymysql

#用于生成随机字符串List的函数

def geneRandStr(num,len=7):

strList = []

for i in range(num):

restr = ''

chars = string.ascii_lowercase + string.digits

for i in range(len):

restr += random.choice(chars)

strList.append(restr)

return strList

#把字符串List存入数据库

def storeInMysql(codeList):

try:

conn = pymysql.connect(host='127.0.0.1',user = 'root',

password = '123456',db = 'pytest')

cur = conn.cursor()

except BaseException as e:

print(e)

else:

try:

cur.execute('DROP DATABASE pytest ')

cur.execute('CREATE DATABASE IF NOT EXISTS pytest ')

cur.execute('USE pytest')

cur.execute('''CREATE TABLE IF NOT EXISTS code(

id INT NOT NULL AUTO_INCREMENT,

code VARCHAR (32) NOT NULL,

PRIMARY KEY (id)

)''')

for code in codeList:

cur.execute('INSERT INTO code(code) VALUES (%s)',(code))

cur.connection.commit()

except BaseException as e:

print(e)

finally:

cur.close()

conn.close()

if __name__ == '__main__':

storeInMysql(geneRandStr(20,10))

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