方法和類 封裝python資料庫

import pymysql

#用於查詢乙個資料
defget_one
(sql,args)
: conn = pymysql.connect(host=
"localhost"
, user=
"root"
, password=
"1234567"
, database=
"python_db"
,charset=
'utf8'
) cursor = conn.cursor(cursor=pymysql.cursors.dictcursor)
cursor.execute(sql,args)
result = cursor.fetchone(
) cursor.close(
) conn.close(
)return result
#用於查詢多個資料
defget_list
(sql,args)
: conn = pymysql.connect(host=
"localhost"
, user=
"root"
, password=
"1234567"
, database=
"python_db"
,charset=
'utf8'
) cursor = conn.cursor(cursor=pymysql.cursors.dictcursor)
cursor.execute(sql,args)
result = cursor.fetchall(
) cursor.close(
) conn.close(
)return result
#用於增刪改
defmodify
(sql,args)
: conn = pymysql.connect(host=
"localhost"
, user=
'root'
, password=
'1234567'
, database=
'python_db'
, charset=
'utf8'
) cursor = conn.cursor(cursor=pymysql.cursors.dictcursor)
cursor.execute(sql,args)
conn.commit(
) cursor.close(
) conn.close(
)#具有返回值
defcreate
(sql,args)
: conn = pymysql.connect(host=
"localhost"
, user=
'root'
, password=
'1234567'
, database=
'python_db'
, charset=
'utf8'
) cursor = conn.cursor(cursor=pymysql.cursors.dictcursor)
cursor.execute(sql, args)
conn.commit(
)#lastrowid 獲得最後插入記錄後取得主鍵id的方法
last_row_id=cursor.lastrowid
cursor.close(
) conn.close(
)return
#建立類防止乙個方法在插入多條資料時反覆的開啟和關閉資料庫
class
sql(
object):
#開啟資料庫
defconnect
(self)
: self.conn=pymysql.connect(host=
"localhost"
, user=
'root'
, password=
'1234567'
, database=
'python_db'
, charset=
'utf8'
) self.cursor= self.conn.cursor(cursor=pymysql.cursors.dictcursor)
defget_list
(self,sql,args)
: self.cursor.execute(sql, args)
result = self.cursor.fetchall(
)return result
defget_one
(self,sql,arg)
: self.cursor.execute(sql, arg)
result = self.cursor.fetchone(
)return result
defmodify
(self,sql,args)
: self.cursor.execute(sql, args)
self.conn.commit(
)# 新增並且拿返回值
defcreate
(self,sql,args)
: self.cursor.execute(sql, args)
self.conn.commit(
)# lastrowid 獲得最後插入記錄後取得主鍵id的方法
last_row_id = self.cursor.lastrowid
return last_row_id
#進行對組資料的修改
defmultiple_motify
(self,sql,args)
:#self.cursor.executmany('insert into student(id,name) values(%s,%s)',[(1,'ax'),(2,'ss')])
self.cursor.executemany(sql,args)
self.conn.commit(
)def
close
(self)
: self.cursor.close(
) self.conn.close(
)

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