Python connect to the database and query the data needed to practice

# -*- coding: utf-8 -*-
import os
import requests
import pymysql
import _thread
#import threading

# Custom download directory
path = 'F: / Reptilian / ysj /'

# Thread lock
#lock = threading.Lock ()
# thread tree
threadNum = 50

# 请求头定义
headers = {
        'Connection': 'keep-alive',
        'Accept-Language': 'zh-CN,zh;q=0.9',
        'Accept':'text/html,application/xhtml+xml,application/xml;\
        q=0.9,image/webp,image/apng,*/*;q=0.8',
        'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 \
        (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36',
    }

# Open Database Connectivity
DB = pymysql.connect (
    Host = '127.0.0.1',
    Port = 3316,
    User = 'Lutong',
    the passwd = 'XXXXX',
    DB = 'Video-Game-Central',
    charset = 'UTF8'
)

# Connect to the database, and trigger actions issued under
def getImgUrlFromDB ():
    
    Gets the operating cursor # use cursor () method of 
    the Cursor = db.cursor ()
    
    # SQL query
    SQL = "poster_hd from the SELECT t_series \
            the WHERE Status = 'Online'"

    the try:
        # execute SQL statements
        cursor.execute (SQL)
        # get a list of all the records
        Results = cursor.fetchall ()
        for Row in Results:
            img = Row [0]
            imgUrl = 'HTTPS: //mgr-vision.vas.lutongnet. COM / Game-ADMIN-Central / '+ IMG
            # printing result
            #Print ( "% S = for imgUrl" for imgUrl%)
            downloads (for imgUrl, IMG)
    the except:
        Print ( "database query error!")

    # Close the database connection
    db.close ()

# 下载操作
def download(url, img):
    try:
        r = requests.get(url)
        print (path + img)
        with open(path + img, 'wb') as f:
            f.write(r.content)
    except requests.exceptions.ConnectionError:
        print('资源请求错误！')
        return
    f.close()

# Multi-threaded download
DEF Loop (url):
    the while True:
        the try:
            download (url)
        the except:
            Print ( 'thread exception \ t% S'% url)
    
# Create a directory developed
DEF createDir (path):
    path = path.strip ( )
    path = path.rstrip ( '\\')
    ISEXIST = os.path.exists (path)
    
    IF not ISEXIST:
        os.makdirs (path)
    the else:
        Print ( '! directory already exists, do not need to be repeated to create a')
        
# Main method                
IF the __name__ == '__main__':
    # Create a directory
    createDir (path);
    getImgUrlFromDB ()
    #for I in Range (0, threadNum):
    # = T of the threading.Thread (target = Loop, name = 'process ID:% s '% i, args = (imgs ,))
    #    t.start()