About append in for statements

I'm a beginner for about 3 days for python programming.
This time, I am trying to do web scraping at Python Selenium.

If you have any questions, I am sorry.

What do you want to do

next_page_url_all → Get the URL of the that appears when you click Next Page.(List)
I'd like to patrol the URLs contained in this next_page_url_all and get the link URL to the detail page listed in each page.

That's the goal.

What can't be solved

Patrol with 1st URL → 2nd URL → 3rd URL...
I have attached the URL obtained by detail_url.get_attribute("href") to detail_url_all.
After execution, if you look at the contents of detail_url_all, it contains only the URL obtained on the last page.

While executing page 1 → page 2 → page 3,
I feel like it's been overwritten every time.

Is there a way to avoid this?

I tried extend, but the result was the same.

If you look at the contents of the list, only the results from the last page are included.
The extend results were similar with just one character separation.

Append Results:

 ['http://example.jp', 'http://example.jp']

extend results:

['h', 't', 't', 'p', ':', '/', 'e', 'x', 'a', 'm', 'p', 'l', 'e', 'e', '.'', 'j', 'p', 'h', 't', 't', 'p', 'p', ':', '/', 'e', 'x', 'a', 'm', 'p', 'e', 'p', 'p', 'p', 'e', 'e', 'e', 'e', 'x', 'm', 'm', 'e', 'e', 'e', 'e', 'e', 'e', 'e',

Written code

 detail_url_all = [ ]

for urlin next_page_url_all:
    driver.get(url)
    detail_url = driver.find_element_by_class_name('class1').find_element_by_class_name('class2').find_element_by_tag_name('a')
    detail_url_all.append(detail_url.get_attribute("href"))