为什么我会收到这个无效的语法错误？

Question

   from django.contrib.admin import helpers, widgets
  File "/Users/Scott/Desktop/myvirtualenv/crazy/lib/python3.7/site-packages/django/contrib/admin/widgets.py", line 152
    


context['related_url'] = mark_safe(related_url)
          ^
SyntaxError: invalid syntax

I'm not sure why I am getting this error and was hoping someone could let me know what I need to do here?

def get_context(self, name, value, attrs):
    context = super(ForeignKeyRawIdWidget, self).get_context(name, value, attrs)
    rel_to = self.rel.model
    if rel_to in self.admin_site._registry:
        # The related object is registered with the same AdminSite
        related_url = reverse(
            'admin:%s_%s_changelist' % (
                rel_to._meta.app_label,
                rel_to._meta.model_name,
            ),
            current_app=self.admin_site.name,
        )

        params = self.url_parameters()
        if params:
            related_url += '?' + '&'.join(
                ('%s=%s' % (k, v) for k, v in params.items())
        context['related_url'] = mark_safe(related_url)
        context['link_title'] = _('Lookup')
        # The JavaScript code looks for this class.
        context['widget']['attrs'].setdefault('class', 'vForeignKeyRawIdAdminField')
    if context['widget']['value']:
        context['link_label'], context['link_url'] = self.label_and_url_for_value(value)
    return context

Here is the full line of code from where the syntax error is occurring. Again I am not sure why I am getting this error. From what I can tell it doesn't have anything to do with the code I've written in Atom but is part of the actual line of coding in the widgets.py file for Django.

Answer 1

You forgot a closing parenthesis in the line above the SyntaxError.

def get_context(self, name, value, attrs):
    context = super(ForeignKeyRawIdWidget, self).get_context(name, value, attrs)
    rel_to = self.rel.model
    if rel_to in self.admin_site._registry:
        # The related object is registered with the same AdminSite
        related_url = reverse(
            'admin:%s_%s_changelist' % (
                rel_to._meta.app_label,
                rel_to._meta.model_name,
            ),
            current_app=self.admin_site.name,
        )

        params = self.url_parameters()
        if params:
            related_url += '?' + '&'.join(
                ('%s=%s' % (k, v) for k, v in params.items()))  # Added a )
        context['related_url'] = mark_safe(related_url)
        context['link_title'] = _('Lookup')
        # The JavaScript code looks for this class.
        context['widget']['attrs'].setdefault('class', 'vForeignKeyRawIdAdminField')
    if context['widget']['value']:
        context['link_label'], context['link_url'] = self.label_and_url_for_value(value)
    return context