zoukankan      html  css  js  c++  java
  • Python:判断文本中的用户名在数据库中是否存在,存在返回1,不存在返回0

    下面是我写的python的一个小脚本,作用是:判断文本中的用户名在数据库中是否存在,存在返回1,不存在返回0.用的是MySQL数据库。


    要注意的是:strip函数的使用,该函数的作用是去除字符串两端多余的whitespace。

    所以strip的作用肯定不是像书上说的去除字符串两端多余空格。

    查了一下文档说

    Return a copy of the string with the leading and trailing characters removed. The chars argument is a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace. 

    该函数的作用是去除字符串两端多余的whitespace

    The most common whitespace characters may be typed via the space bar or the tab key. Depending on context, a line-break generated by the return or enter key may be considered whitespace as well.

    whitespace应该是空格,Tab和换行的统称,而不仅仅是空格。

    ok,贴代码吧!

    !/usr/bin/python
    #!Filename = username_indb.py
     
    import MySQLdb
    try:
        conn=MySQLdb.connect(host = "localhost", user = "root", passwd ="123@qwe",db = "test",port = 3306)
        cur=conn.cursor()
        cur.execute("select username from userinfor")
        result = cur.fetchall()
        cur.close()
        conn.close()
    except MySQLdb.Error,e:
        print "MySQLdb error %s :%s" %(e.args[0],e.args[1])
    data=[]
    #print result
    for i in range(0,len(result)):
        data.append(result[i][0])
    #print data
     
     
    for line in open("C:Python27scriptKingusername.txt"):
        if line.strip() in data:
            #tips:'line.strip()' is used to  remove '/n'
            print line,1
        else:
            print line,0
  • 相关阅读:
    链接
    列表
    Android Studio AVD 虚拟机 联网 失败
    docker error during connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.29/containers/json: open //./pipe/docker_engine: The system cannot find the file specified. In the default daemon configuratio
    JSP Failed to load resource: net::ERR_INCOMPLETE_CHUNKED_ENCODING
    js jsp form
    intellij jsp 中文乱码
    [转载]在Intellij Idea中使用JSTL标签库
    windows pybloomfilter
    docker mysql
  • 原文地址:https://www.cnblogs.com/tangdouguard/p/3838609.html
Copyright © 2011-2022 走看看