我在 python 和 mySQL 中创建了一个程序，它创建了一个数据库并从文本文件中导入数据并将它们放入 4 个不同的列中。代码有效，但我想更改代码并创建函数。

任何人都可以帮我创建一个创建 mySQL 数据库的函数吗？这是我目前的代码。提前致谢!

import MySQLdb 

 # Create connection to the MySQL database - Make sure host, user, 
 # passwd are consistent with the database you are trying to conect to

 def create_database():
     db_connection = MySQLdb.connect(host='localhost', user='root', passwd='password') 

     # Variable that exacutes Database calls with MySQL

     cursor = db_connection.cursor()

     # Create databse with MYSQL query - databasename

     cursor.execute('CREATE DATABASE inb104')

     # Select which database to use with MYSQL query - databasename

     cursor.execute('USE inb104')

     # Create database with MYSQL query - tablename & fields 

     cursor.execute('''CREATE TABLE popularity (
                       PersonNumber INT,
                       Value VARCHAR(70),
                       Category VARCHAR(25),
                       PRIMARY KEY (PersonNumber, Value, Category)
                       )
                   ''')




    cursor.execute("LOAD DATA LOCAL INFILE 'tv.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET     Category='TV'")

    cursor.execute("LOAD DATA LOCAL INFILE 'actors.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Actors'")

    cursor.execute("LOAD DATA LOCAL INFILE 'movies.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Movies'")

    cursor.execute("LOAD DATA LOCAL INFILE 'sports.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Sports'")

    cursor.execute("LOAD DATA LOCAL INFILE 'activities.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Activities'")

    cursor.execute("LOAD DATA LOCAL INFILE 'musicians.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Musicians'")

    cursor.execute("LOAD DATA LOCAL INFILE 'games.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Games'")

    cursor.execute("LOAD DATA LOCAL INFILE 'books.txt' INTO TABLE popularity FIELDS TERMINATED BY '\\t' LINES TERMINATED BY '\\n' (PersonNumber, Value, Category) SET Category='Books'")



    # commit the changes to the database
    db_connection.commit()


    # close the cursor and connection
    cursor.close()

    db_connection.close()

好的，这就是我目前所拥有的。

我收到这个错误:TypeError: data_entry() takes no arguments (1 given)

而且，数据也没有从文本文件插入到表格中。任何帮助将不胜感激!!

import MySQLdb 


def connect_to_database(user, password):

return MySQLdb.connect(host='localhost', user=user, passwd=password) 


def create_database(cursor):

cursor.execute('CREATE DATABASE inb104')

cursor.execute('USE inb104')

cursor.execute('''CREATE TABLE popularity (
                      PersonNumber INT,
                      Value VARCHAR(70),
                      Category VARCHAR(25),
                      PRIMARY KEY (PersonNumber, Value, Category)
                      )
                      ''')

def load_file(cursor, *files):
"""Load the files given in (filename, category) format."""
sql = '''LOAD DATA LOCAL INFILE '%s' INTO TABLE popularity 
         FIELDS TERMINATED BY '\\t' 
         LINES TERMINATED BY '\\n' 
         (PersonNumber, Value, Category) 
         SET Category='%s'")
     '''
for filename, category in files:
    cursor.execute(sql, (filename, category))


def data_entry():
"""Connect to the DB server, create the DB and table and load the table with records
""" 
db = connect_to_database('root', 'password')
cursor = db.cursor()
create_database(cursor)
load_files(cursor,('tv.txt', 'TV'), ('actors.txt', 'Actors'), 
           ('movies.txt', 'Movies'))
db.commit()
cursor.close()
db.close()

最佳答案

你加载数据的sql应该是

sql = '''LOAD DATA LOCAL INFILE %s INTO TABLE popularity 
         FIELDS TERMINATED BY ';' 
         LINES TERMINATED BY '\\n' 
         (PersonNumber, Value, Category) 
         SET Category=%s
     '''

+ %s --> '%s'
+ remove " at the end

它应该可以工作。 此外，load_files --> load_file

关于python - 在 Python 中创建一个创建 mySQL 数据库的函数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3965604/