Question

我有一个tablename = myclass with field：student

**student**
 1.Jane
 2.John
 3.Maria

我有一个文本文件“qwer.txt”，其中包含这些学生的详细信息：

Jane is a good student and gets good marks.
john is a naughty one.
maria is a good student.

我有另一个数据库表“标记”，其中包含这些学生的标记：

 student english physics
 Jane     100     98 
 John     97      95
 Maria    90      91

现在，我需要的程序是我需要搜索数据库的第一个名称“Jane”并且必须搜索关于Jane的文本文件。如果找到Jane则必须打印该行然后它必须连接秒标记数据库并打印Jane english marks。

我做了半个编码，如

import MySQLdb


db = MySQLdb.connect(host="localhost", # your host, usually localhost
                         user="root", # your username
                          passwd="mysql", # your password
                          db="sakila") # name of the data base
cursor = db.cursor()

    # execute SQL select statement
cursor.execute("SELECT name FROM myclass")


    # commit your changes
db.commit()

keywords=[]
    #here fetchall() gets all the rows and we append carnames to key words

for i in cursor.fetchall():
    keywords.append(i[0])


with open('qwer.txt','r') as file:
    for line in file:
        for key in keywords:
            if key in line:
               print line

它会打印该行，但不知道如何连接marks.please help

**MAIN OBJECTIVE**
It must search name one by one **from the table**(as input) and provide result to a text file.
It must connect another Marks database table and print marks to text file.

请理解我的疑问并帮助我！

Answer 1

一种方式：

 import MySQLdb


db = MySQLdb.connect(host="localhost", # your host, usually localhost
                         user="root", # your username
                          passwd="mysql", # your password
                          db="sakila") # name of the data base
cursor = db.cursor()

    # execute SQL select statement
cursor.execute("SELECT name,english,pysics FROM myclass c,marks m where c.student=m.student")


    # commit your changes




rows=cursor.fetchall() 
 db.commit()




with open('qwer.txt','r') as file:
    for line in file:
        for row in rows:
            if rows[0] in line:
               print rows[0],'english mark',rows[1]

其他方式：

导入MySQLdb

db = MySQLdb.connect(host="localhost", # your host, usually localhost
                         user="root", # your username
                          passwd="mysql", # your password
                          db="sakila") # name of the data base
cursor = db.cursor()

    # execute SQL select statement
cursor.execute("SELECT name FROM myclass")


    # commit your changes




rows=cursor.fetchall() 
 )




with open('qwer.txt','r') as file:
    for line in file:
        for row in rows:
            if rows[0] in line:
               stmt="select english from marks where student = :student"
               cursor.execute(stmt,dict(student=row[0]))
               print "english marks:",cursor.fetchall()[0][0]

通过检查数据库和放置来解析python

1 个答案: