Python - Django - page display the page number of fixed

If too many pages, it will show all looked very jumbled on a page

You can display the number of pages specified in the page

E.g:

book_list.html：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>书籍列表</title>
    <link rel="stylesheet" href="/static/bootstrap/css/bootstrap.min.css">
</head>
<body>

<div class="container">

    <table class="table table-bordered">
        <thead>
        <tr>
            <th>序号</th>
            <th>id</th>
            <th>书名</th>
        </tr>
        </thead>
        <tbody>
        {% for book in books %}
            <tr>
                <td>{{ forloop.counter }}</td>
                <td>{{ book.id }}</td>
                <td>{{ book.title }}</td>
            </tr>
        {% endfor %}

        </tbody>
    </table>

    <nav aria-label="Page navigation">
        <ul class="pagination">
            <li>
                <a href="#" aria-label="Previous">
                    <span aria-hidden="true">«</span>
                </a>
            </li>
            <li>
                {{ page_html|safe }}
            </li>
            <li>
                <a href="#" aria-label="Next">
                    <span aria-hidden="true">»</span>
                </a>
            </li>
        </ul>
    </nav>

</div>

</body>
</html>

views.py：

Import the render django.shortcuts from 
from app01 Import Models 


DEF book_list (Request): 
    # parameters taken from the URL 
    The page_num = request.GET.get ( "Page") 
    Print (The page_num, type (The page_num)) 
    The page_num = int (The page_num) 

    # define two variables hold data taken from where to where 
    DATA_START = (page_num-1) * 10 
    data_end page_num * = 10 

    # the total number of books 
    total_count = models.Book.objects.all (). COUNT () 

    # show how many of each page data 
    per_page = 10 

    # total number of pages required to display 
    total_page, m = divmod (total_count, per_page) 

    on page # page show the most 
    MAX_PAGE = 11 
    half_max_page // 2 = MAX_PAGE 

    displayed on the page number of the start page # 
    page_start = page_num - half_max_page
    Show on # page number of the end of the page 
    PAGE_END = page_num + half_max_page 

    # If the current page Less than half of 1 small 
    IF PAGE_START <= 1: 
        PAGE_START = 1 
        PAGE_END = MAX_PAGE 
    # If the current page plus half than the total number of pages is greater 
    if page_end> total_page : 
        PAGE_END = total_page 
        PAGE_START = total_page - MAX_PAGE 

    # if there is data 
    IF m: 
        total_page + =. 1 

    all_book = models.Book.objects.all () [DATA_START: data_end] 

    # splicing html paging codes 
    html_list = [] 
    for I in Range (PAGE_START, PAGE_END +. 1): 
        . tmp = '<Li> <a href="/book_list/?page={0}"> </a> {0} </ Li>' the format (I)  
        html_list. append (tmp)

    page_html = "" .join (html_list)

    return render(request, "book_list.html", {"books": all_book, "page_html": page_html})

operation result:

Python - Django - page display the page number of fixed

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