对python插入数据库和生成插入sql的示例讲解

如下所示：

#-*- encoding:utf-8 -*-
import csv
import sys,os
import pymysql 
 
def read_csv(filename):
  '''
  读取csv文件
  '''
  data = []
  with open(filename) as f:
    f_csv = csv.reader(f)
    headers = next(f_csv)
    #数据格式[1111,22222,1111,1111,.....]
    for row in f_csv:
      # process row
      field1=row[0]
      data.append(row)
    print headers
  return data
 
def load_data():
  '''
  插入数据库
  '''
  filename = sys.argv[1]
  try:
  #获取一个数据库连接，注意如果是utf-8类型的，需要制定数据库
    conn=pymysql.connect(host='192.168.1.161',user='naliworld',passwd='password!',db='search',port=3306,charset='utf8')
    cur=conn.cursor()#获取一个游标
    data=read_csv(filename)
    for row in data:
      # process row
      field1=row[0]
      sql='''insert into search.tb_text_uid_list(appid,type,uid,creator,createtime) values({},{},{},{},{}) '''.format(3,1,field1,'\'admin\'','\'2018-08-14 13:44:09\'')
      print sql
      cur.execute(sql)
    cur.close()#关闭游标
    conn.commit()
    conn.close()#释放数据库资源
  except exception as e :print(e)
 
def get_sql():
  '''
  插入数据库生成插入sql
  '''
  sql_list = []
  filename = sys.argv[1]
  data=read_csv(filename)
  for row in data:
    # process row
    field1=row[0]
    sql='''replace into search.tb_text_uid_list(appid,type,uid,creator,createtime) values({},{},{},{},{}) '''.format(3,1,field1,'\'admin\'','\'2018-08-14 13:44:09\'')
    sql_list.append(sql)
  file_object = open('sql.txt', 'w')
  file_object.writelines([line+';\n' for line in sql_list])
  file_object.close( )
 
if __name__ == "__main__":
  get_sql()
 
  

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