def course_detail(request, username, course_key):
 user = get_effective_user(request.user, username)
 return get_course_overview_with_access(user, get_permission_for_course_about(), course_key)

def course_detail ( request , username , course_key ) : user = get_effective_user ( request . user , username ) return get_course_overview_with_access ( user , get_permission_for_course_about ( ) , course_key )
return a single course identified by course_key .