usaspending_api/accounts/v2/urls_budget_functions.py
from django.urls import re_path
from usaspending_api.accounts.v2.views import budget_function
urlpatterns = [
re_path(r"^list_budget_functions/$", budget_function.ListBudgetFunctionViewSet.as_view()),
re_path(r"^list_budget_subfunctions/$", budget_function.ListBudgetSubfunctionViewSet.as_view()),
]