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Django- Reversing custom Admin URLs

I'm using an App that configures some Admin URLs as:
#admin.py....
def get_urls(self):
urls = super(FormAdmin, self).get_urls()
extra_urls = [
url("^(?P<form_id>\d+)/entries/$",
self.admin_site.admin_view(self.entries_view),
name="form_entries"),
#......
]
return extra_urls + urls
I'm having trouble using template tags to get a URL corresponding to that, in one of my templates. I'm trying stuff like:
4-Entries
(Where forms is the App's label). I keep running into the No Reverse Match type of errors:
NoReverseMatch at /polls/ Reverse for 'forms_form_entries' with
arguments '(4,)' and keyword arguments '{}' not found. 0 pattern(s)
tried: []
What am I missing that makes the tag work correctly?

Try this in html
4-Entries

Your url pattern name form_entries doesn't match forms_form_entries from the URL tag. Django does not automatically prefix the pattern name with <app_name>_ as you appear to be expecting.
Change one of them so that they match.

View not found for views with number at the end

I'm trying to do a reverse like this:
print reverse("shows-view")
This is in my urls.py:
url(r'^shows/(\d+)$', views.show_details, name="shows-view"),
Whenever I try to do that, it just returns:
Reverse for 'shows-view' with arguments '()' and keyword arguments '{}' not found. 1 pattern(s) tried: ['shows/(\\d+)$']
But if I try to access the page directly (http://localhost/shows/3333) then it works fine
But if I do a reverse for other views like this:
print reverse("shows-default-view")
with the following declaration in the same urls.py file:
url(r'^shows/', views.popular, name="shows-default-view"),
then it works fine. Does anyone have any idea why?

The URL in question accepts an argument (\d+) which you are not passing your reverse function. Just think: this is a details view, but which show do you want to display?
To fix, call reverse with the args parameter:
reverse("shows-default-view", args=[1]) # to show show with id of 1
In general for URL's like that, the recommendation is to have a named captured group:
url(r'^shows/(?P<pk>\d+)$', views.show_details, name="shows-view")
And then the call to reverse will be:
reverse("shows-default-view", kwargs={'pk': 1})
To use reverse in a template, just put the two arguments together:
{% url 'shows-view' 1 %}

Error redirecting after login

I am trying to redirect users to a create-profile form after signup.Since I don't know how to use dynamic url for LOGIN_REDIRECT_URL.I tried this little trick of linking it to a static view then finally to a dynamic view using redirect.It gives the error Reverse for 'add_profile' with arguments '()' and keyword arguments '{'username': u'badguy'}' not found. 0 pattern(s) tried: [] (with 'badguy' truly the username of the just signed-up user').From the error,it is clearly passing the username to the view.My codes are:
settings.py
LOGIN_REDIRECT_URL = '/prof-change/gdyu734648dgey83y37gyyeyu8g/'
urls.py
url(r'^prof-change/gdyu734648dgey83y37gyyeyu8g/',views.login_redir,name='login_redir'),
url(r'^create-profile/(?P<username>\w+)/$',views.add_profile,name='create-profile'),
views.py
def login_redir(request):
user=get_object_or_404(User,username=request.user.username)
username=user.username
return redirect('add_profile',username=username)
def add_profile(request,username):
userman=User.objects.get(username=username)
........
........

When you reverse urls (including when you use a url name with the redirect shortcut), you should use the name of the url pattern, not the view. The url pattern has name='create-profile', so use that.
redirect('create-profile', username=username)

Django How do i determine what arguments are missing?

Trying to access part of code by get request and receiving this error
NoReverseMatch: Reverse for 'homepage' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: [] looked around for help and i think its that am missing some arguments.
here is request am using in my test
req = self.client.get('/password/reset/')
and the code it leads to is as:
class PasswordResetEmailView(FormView):
template_name = 'temp/password_reset.html'
form_class = PasswordResetForm
success_url = 'password_reset_ok'
def get(self, request, *args, **kwargs):
form = self.get_form(self.form_class)
return self.render_to_response(self.get_context_data(form=form))
any guidance ?

You ask specifically about "determining which arguments are missing", but should be irrelevant to your error.
Your error message states that it can't find any URL patterns matching the name "homepage", before attempting any argument matching. Therefore no URLs exist named "homepage" in your setup. If it was an argument mismatch, you'd see a list of named URLs in the error such as "tried X urls."
Either define a URL named home in your URLConf url(r'^home/$', 'home_view', name="homepage") or find the location that is calling reverse('homepage') and remove it. You will find this information in your traceback.

django named url not picking variables

I have the following url pattern -
url(r'^detail/(?P<var>[\w]+)/(?P<var_slug>[\w-])/$', 'player_detail', name='player_detail'),
In my view, I have the following -
model_dict = {"player":PlayerProfile, "event":PlayerEvent, "need":PlayerNeed}
def player_list(request, var=None, var_slug=None):
'''
displays the list of vars
'''
objs = model_dict.get(var).objects.filter(slug=var_slug).order_by('-creation_time')[:20]
template_name = "list_"+str(var)+"s.html"
return render(request, template_name, {"objs":objs})
In my templates I finally do the following -
details of Player
The error I get is following -
Reverse for 'player_detail' with arguments '()' and keyword arguments '{u'var': u'baseball', u'slug': u'obj.slug'}' not found.
What am I missing?
also, is it a good way to pick models dynamically depending on the variable in the parameter, and generating a template name on the fly?

slug='obj.slug' should be slug=obj.slug
Your regex doesn't match a .
Also you probably want[\w-]+ just like your other regex.. one or more [\w or -]