Invalid Syntax. Second pair of eyes might help

I have this:

class Homepage(FormView):

    template_name = 'index.html'

    def get(self, request, *args, **kwargs):

        ecg_form = GhanaECGForm()

        ecg_form.prefix = 'ecg_form'

        last_form = FormLastActiveForm()

        last_form.prefix = 'last_form'

        return self.render_to_response(self.get_context_data('ecg_form': ecg_form, 'last_form': last_form))

    def post(self, request, *args, **kwargs):

        ecg_form = GhanaECGForm(self.request.POST, prefix='ecg_form')

        last_form = FormLastActiveForm(self.request.POST, prefix='last_form')

        if ecg_form.is_valid() and last_form.is_valid():

            return HttpResponseRedirect('/ta/')

        else:

            return self.form_invalid(ecg_form, last_form, **kwargs)

    def form_invalid(self, ecg_form, last_form, **kwargs):

        ecg_form.prefix = 'ecg_form'

        last_form.prefix = 'last_form'

        return self.render_to_response(self.get_context_data('ecg_form': ecg_form, 'last_form': last_form))

The reddened line throws this traceback:

Traceback (most recent call last):

  File "manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 338, in execute_from_command_line

    utility.execute()

  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 312, in execute

    django.setup()

  File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 18, in setup

    apps.populate(settings.INSTALLED_APPS)

  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 115, in populate

    app_config.ready()

  File "/usr/local/lib/python2.7/dist-packages/debug_toolbar/apps.py", line 15, in ready

    dt_settings.patch_all()

  File "/usr/local/lib/python2.7/dist-packages/debug_toolbar/settings.py", line 232, in patch_all

    patch_root_urlconf()

  File "/usr/local/lib/python2.7/dist-packages/debug_toolbar/settings.py", line 220, in patch_root_urlconf

    reverse('djdt:render_panel')

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 550, in reverse

    app_list = resolver.app_dict[ns]

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 352, in app_dict

    self._populate()

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 285, in _populate

    for pattern in reversed(self.url_patterns):

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 402, in url_patterns

    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py", line 396, in urlconf_module

    self._urlconf_module = import_module(self.urlconf_name)

  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module

    __import__(name)

  File "/home/khophi/Developments/DjangoApps/logECG/logECG/urls.py", line 10, in <module>

    url(r'^', include('main.urls')),

  File "/usr/local/lib/python2.7/dist-packages/django/conf/urls/__init__.py", line 33, in include

    urlconf_module = import_module(urlconf_module)

  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module

    __import__(name)

  File "/home/khophi/Developments/DjangoApps/logECG/main/urls.py", line 1, in <module>

    from . import views

  File "/home/khophi/Developments/DjangoApps/logECG/main/views.py", line 49

    return self.render_to_response(self.get_context_data('ecg_form': ecg_form, 'last_form': last_form))

Honestly, I wish I knew what was wrong. I've got no idea.

In sublime, using a python lint, when I click on the line 49, I get the message:

[E]: Invalid Syntax

Please help.

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