Python MySQL

• Szerző: Sallai András
• Copyright © 2020, Sallai András
• Licenc: CC BY-SA 4.0
• Web: https://szit.hu

pip3 install --user mysql-connector

database.py

import mysql.connector
 
conn = mysql.connector.connect(
  host="localhost",
  user="penztar",
  passwd="titok"
)
 
print(conn)

Vagy:

database.py

import mysql.connector
 
config = {
  'host': 'localhost',
  'user': 'feherbt',
  'passwd':'titok'
}
 
conn = mysql.connector.connect(**config, database='feherbt')
print(conn)

A kimenet ehhez hasonló kell legyen:

<mysql.connector.connection.MySQLConnection object at 0x7f01954f6d30>

makedb.py

import mysql.connector
 
conn = mysql.connector.connect(
  host="localhost",
  user="penztar",
  passwd="titok"
)
 
cur = conn.cursor()
 
cur.execute('create database penztar')

leker.py

import mysql.connector
 
conn = mysql.connector.connect(
  host="localhost",
  user="feherbt",
  passwd="titok",
  database='feherbt'
)
 
cur = conn.cursor()
sql = 'select * from employees'
cur.execute(sql)
conn.close()
 
print(cur.fetchall())

mezonkent.py

import mysql.connector
 
conn = mysql.connector.connect(
  host="localhost",
  user="feherbt",
  passwd="titok",
  database='feherbt'
)
 
cur = conn.cursor()
sql = 'select * from employees'
cur.execute(sql)
conn.close()
 
for (id, name, city, salary) in cur:
    print(f"{id}:{name}:{city}:{salary}")

beszur.py

import mysql.connector
 
config = {
  'host': 'localhost',
  'user': 'feherbt',
  'passwd':'titok'
}
 
conn = mysql.connector.connect(**config, database='feherbt')
 
cur = conn.cursor()
sql = """
insert into employees
(name, city, salary)
values
('Tekerős Ferenc', 'Hatvan', 2877000)
"""
cur.execute(sql)
conn.commit()
conn.close()
 
print('Utoljára beszúrt: ', cur.lastrowid)
print('Érintett rekordok száma: ', cur.rowcount)

elokeszit.py

import mysql.connector
 
config = {
  'host': 'localhost',
  'user': 'feherbt',
  'passwd':'titok'
}
 
conn = mysql.connector.connect(**config, database='feherbt')
 
cur = conn.cursor()
sql = """
insert into employees
(name, city, salary)
values
(%s, %s, %s)
"""
values = ("Perec Dénes", "Szeged", 2800400)
cur.execute(sql, values)
conn.commit()
conn.close()
 
print('Utoljára beszúrt: ', cur.lastrowid)
print('Érintett rekordok száma: ', cur.rowcount)

tobb.py

import mysql.connector
 
config = {
  'host': 'localhost',
  'user': 'feherbt',
  'passwd':'titok'
}
 
conn = mysql.connector.connect(**config, database='feherbt')
 
cur = conn.cursor()
sql = """
insert into employees
(name, city, salary)
values
(%s, %s, %s)
"""
values = [
    ("Filip Dezső", "Szeged", 3500000),
    ("Andri Árpád", "Szeged", 3500000),
    ("Csikos Lóránt", "Szeged", 3500000),
]
cur.executemany(sql, values)
conn.commit()
conn.close()
 
print('Három közül az elsőként beszúrt: ', cur.lastrowid)
print('Érintett rekordok száma: ', cur.rowcount)