Python *** 作 MySQL 的5种方式

1、MySQLdb

# 前置条件

sudo apt-get install python-dev libmysqlclient-dev # Ubuntu

sudo yum install python-devel mysql-devel # Red Hat / CentOS

# 安装

pip install MySQL-python

Windows 直接通过下载 exe 文件安装

#!/usr/bin/python

import MySQLdb

db = MySQLdb.connect(

host = "localhost", # 主机名

user = "root", # 用户名

passwd = "pythontab.com", # 密码

db = "testdb") # 数据库名称

# 查询前，必须先获取游标

cur = db.cursor()

# 执行的都是原生SQL语句

cur.execute("SELECT * FROM mytable")

for row in cur.fetchall():

print(row[0])

db.close()

2、mysqlclient

# Windows安装

pip install some-package.whl

# linux 前置条件

sudo apt-get install python3-dev # debian / Ubuntu

sudo yum install python3-devel # Red Hat / CentOS

brew install mysql-connector-c # macOS (Homebrew)

pip install mysqlclient

3、PyMySQL

pip install PyMySQL

# 为了兼容mysqldb，只需要加入

pymysql.install_as_MySQLdb()

import pymysql

conn = pymysql.connect(host = '127.0.0.1', user = 'root', passwd = "pythontab.com", db = 'testdb')

cur = conn.cursor()

cur.execute("SELECT Host,User FROM user")

for r in cur:

print(r)

cur.close()

conn.close()

4、peewee

pip install peewee

import peewee

from peewee import *

db = MySQLDatabase('testdb', user = 'root', passwd = 'pythontab.com')

class Book(peewee.Model):

author = peewee.CharField()

title = peewee.TextField()

class Meta:

database = db

Book.create_table()

book = Book(author = "pythontab", title = 'pythontab is good website')

book.save()

for book in Book.filter(author = "pythontab"):

print(book.title)

5、SQLAlchemy

from sqlalchemy import create_engine

from sqlalchemy.orm import sessionmaker

from sqlalchemy_declarative import Address, Base, Person

class Address(Base):

__tablename__ = 'address'

id = Column(Integer, primary_key = True)

street_name = Column(String(250))

engine = create_engine('sqlite:///sqlalchemy_example.db')

Base.metadata.bind = engine

DBSession = sessionmaker(bind = engine)

session = DBSession()

# Insert a Person in the person table

new_person = Person(name = 'new person')

session.add(new_person)

session.commit()

MySQLdb.connect是python 连接MySQL数据库的方法，在Python中 import MySQLdb即可使用，至于connect中的参数很简单：\x0d\x0ahost：MySQL服务器名\x0d\x0auser：数据库使用者\x0d\x0apassword：用户登录密码\x0d\x0adb： *** 作的数据库名\x0d\x0acharset：使用的字符集(一般是gb2312)\x0d\x0acursor = db.cursor() 其实就是用来获得python执行Mysql命令的方法,也就是\x0d\x0a我们所说的 *** 作游标\x0d\x0a下面cursor.execute则是真正执行MySQL语句，即查询TABLE_PARAMS表的数据。\x0d\x0a至于fetchall()则是接收全部的返回结果行 row就是在python中定义的一个变量，用来接收返回结果行的每行数据。同样后面的r也是一个变量，用来接收row中的每个字符，如果写成C的形式就更好理解了\x0d\x0afor(string row = ''row 回答于 2022-11-16

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