如何從python xrange獲取特定條目 - django分頁器

Question

我使用Django paginator，並試圖讓它在底部顯示多個頁面。目前我正在設置它，因此它只會在當前的號碼周圍顯示幾個數字（例如，前一個2 3 5 6前一個），但我知道我該如何做到這一點，但我正在努力解決django的分頁存儲page_range。它將它作爲x_range存儲，因此我不知道如何從中獲得某些值。

middle = job_listings.paginator.page_range[before:after] 

這就是我正在嘗試做的事情，但它會返回以下錯誤。任何人都可以告訴我如何從xrange中獲得一系列物品？

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/listings/browse?page=4 

Django Version: 1.9.1 
Python Version: 2.7.10 
Installed Applications: 
('django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'django.contrib.sites', 
'main', 
'listings', 
'profiles', 
'allauth', 
'allauth.account', 
'allauth.socialaccount') 
Installed Middleware: 
('django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware') 



Traceback: 

File "C:\Python27\Lib\site-packages\django\core\handlers\base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "C:\Python27\Lib\site-packages\django\core\handlers\base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "D:\Other folders\Desktop\Student Job Search\code\opus_jobs_project\listings\views.py" in browse 
    54.  middle = job_listings.paginator.page_range[before:after] 

Exception Type: TypeError at /listings/browse 
Exception Value: sequence index must be integer, not 'slice' 

可能相關的分頁代碼 -

job_listings_list = JobListing.objects.filter(filters).distinct().order_by('-listing_date') 
print(job_listings_list) 

paginator = Paginator(job_listings_list, 1) # Show 25 contacts per page 

page = request.GET.get('page') 

try: 
    job_listings = paginator.page(page) 
except PageNotAnInteger: 
    # If page is not an integer, deliver first page. 
    job_listings = paginator.page(1) 
except EmptyPage: 
    # If page is out of range (e.g. 9999), deliver last page of results. 
    job_listings = paginator.page(paginator.num_pages) 

current_page_start = job_listings.start_index() 
current_page_end = job_listings.end_index() 

before_current_pages=1 
after_current_pages=1 
before = max(job_listings.number - before_current_pages, 0) 
after = job_listings.number + after_current_pages 
middle = job_listings.paginator.page_range[before:after] 
print("before", before, "after", after) 

（讓我知道如果你需要更多的代碼）

Answer 1

您可以通過它調用列表使用的xrange對象的列表。

>>> x = xrange(5) 
>>> x 
xrange(5) 
>>> list(x) 
[0, 1, 2, 3, 4]