解决Python脚本500错误

在尝试运行Web服务器上的Python脚本时，遇到了500错误。通常，当脚本中引用了未在服务器上安装的功能时，会出现此错误。但是，在此问题中，脚本已在Python IDE中正常运行，但在放入服务器中后出现了500错误。为了寻找可能的原因，用户与Web主机提供商JustHost.com联系，但他们说问题出在脚本中。

2. 解决方案

仔细检查脚本代码，发现脚本中出现的500错误是由于使用了MySQLdb库，而在脚本运行的服务器上并没有安装MySQLdb库。因此，为了解决此问题，需要先在服务器上安装MySQLdb库。

以下是解决问题的步骤：

1. 使用SSH或FTP连接到服务器。
2. 以root用户身份登录服务器。
3. 运行以下命令安装MySQLdb库：

pip install MySQLdb

安装完成后，需要重新启动脚本。

以下是在代码中加入对MySQLdb库的引用：

import MySQLdb

db = MySQLdb.connect("localhost", "username","password","database")

代码例子

完成以上步骤后，脚本应该可以正常运行了。以下是完整的代码示例：

#! /usr/bin/python

import MySQLdb

db = MySQLdb.connect("localhost", "username","password","database")
CUR = db.cursor()

def get_password(username):
    sql = "select Password from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()[0]
    if result == None:
        return "User does not exist"
    else:
        return result[0]

def get_comment(username):
    sql = "select Comments from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()
    if result == None:
        return "User has not updated comment"
    else:
        return result[0]

def get_email(username):
    sql = "select Email from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()
    if result == None:
        return "User does not exist"
    else:
        return result[0]

def get_longitude(username):
    sql = "select Longitude from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()
    if result == None:
        return "User did not update location"
    else:
        return result[0]

def get_latitude(username):
    sql = "select Latitude from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()
    if result == None:
        return "User did not update location"
    else:
        return result[0]

def get_address(username):
    sql = "select Address from Users where Username=%s"
    CUR.execute(sql, [username])
    result = CUR.fetchone()
    if result == None:
        return "User did not update email"
    else:
        return result[0]

def friends_list(username):
    sql = "select all friend from accepted_req where userLoggedIn=%s"
    CUR.execute(sql, [username])
    result=[]
    query = CUR.fetchall()
    if query == None:
        return "User has no friends"
    else:
        for friend in query:
            result.append(friend[0])

    return result

def markers_on_map(username):
    friendsList = friends_list(username)
    fullFriendsList = []
    for friend in friendsList:
        UserDictionary = {}
        UserDictionary["Username"] = friend
        UserDictionary["Comment"] = str(get_comment(friend))
        UserDictionary["Latitude"] = get_latitude(friend)
        UserDictionary["Longitiude"] = get_longitude(friend)
        fullFriendsList.append(UserDictionary)

    return fullFriendsList


print "Content-type: text/html\n\n"

print markers_on_map("brock")

通过这些步骤，此问题应该得到解决。现在脚本应该可以在服务器上正常运行了。