请求中的Python 3变量导致404？

我有两个列表，一个是日期列表，另一个是小时列表，我正在浏览一个网站寻找内容

date = ['1','2','3']
hour = ['1','2','3']

我编写了以下

while

/

for

来循环查看日期和时间，并打开所有组合：

datetotry = 0  
while (datetotry < len(date)):
    for i in range(len(hour)):              
        print ('https://www.website.org/backups/backup_2004-09-'+date[datetotry]+'_'+hour[i]+".sql")
        html = opener.open('https://www.website.org/backups/backup_2004-09-'+date[datetotry]+'_'+hour[i]+'.sql').read()
datetotry += 1

节，而不是列表中的项目，如打印到控制台时

这是否意味着我必须执行类似于

urllib.parse.urlencode

的操作来实际替换变量

我导入了文章中提到的库，并将代码更改为：

 from urllib.error import URLError, HTTPError
 from urllib.request import Request, urlopen

while (datetotry < len(date)):
for I in range(len(hour)):              
    HTML = Request('https://www.website.org/backups/backup_2004-09-'+date[datetotry]+'_'+hour[i]+'.sql')
    try:
        response = urlopen(html)
    except URLError as e:
        print('The server couldn\'t fulfill the request.')
        print('Error code: ', e.code)
    except URLError as e:
        print('We failed to reach a server.')
        print('Reason: ', e.reason)
    else:

从urllib.error导入urleror，HTTPError
从urllib.request导入请求，urlopen
while（datetotry

---

因此代码实际运行，而不是因为返回404而停止。查看其实际请求的最佳方式是什么？我是否必须进行某种编码？编程新手，尤其是Python3

白天和小时不应该是零填充的吗？你能给我们一个有效的工作URL吗？如果你不局限于stdlib，还有请求库

 from urllib.error import URLError, HTTPError
 from urllib.request import Request, urlopen

while (datetotry < len(date)):
for I in range(len(hour)):              
    HTML = Request('https://www.website.org/backups/backup_2004-09-'+date[datetotry]+'_'+hour[i]+'.sql')
    try:
        response = urlopen(html)
    except URLError as e:
        print('The server couldn\'t fulfill the request.')
        print('Error code: ', e.code)
    except URLError as e:
        print('We failed to reach a server.')
        print('Reason: ', e.reason)
    else: