stark元件前戲之django路由分發的本質

之前的路由分發書寫：

")檢視include原始碼

def include(arg, namespace=none):

ifisinstance(arg, tuple):
#callable returning a namespace hint.
try:
except
valueerror:
ifnamespace:
raise
improperlyconfigured(
'cannot override the namespace for a dynamic module that ''
provides a namespace.')
raise
improperlyconfigured(
'passing a %d-tuple to include() is not supported. pass a ''
''provide the namespace argument to include() instead.
' %len(arg)
)else
: 
#no namespace hint - use manually provided namespace.
urlconf_module =arg
ifisinstance(urlconf_module, str):
urlconf_module =import_module(urlconf_module)
patterns = getattr(urlconf_module, '
urlpatterns
', urlconf_module)
' 
if namespace and
not 
raise
improperlyconfigured(
''''
'module, or pass a 2-tuple containing the list of patterns and ''',)
namespace = namespace or
#make sure the patterns can be iterated through (without this, some
#testcases will break).
ifisinstance(patterns, (list, tuple)):
for url_pattern in
patterns:
pattern = getattr(url_pattern, '
pattern
', none)
ifisinstance(pattern, localeprefixpattern):
raise
improperlyconfigured(
'using i18n_patterns in an included urlconf is not allowed.')
return
#

from django.urls import

re_path
urls
urlpatterns =[
path(
'admin/
', admin.site.urls),
re_path(r
'^web/
']

結論：

#

如果第乙個引數有urls.urlpatterns屬性，那麼子路由就從該屬性中獲取
#如果第乙個引數無urls.urlpatterns屬性，那麼子路由就是第乙個引數

from django.urls import

re_path
views
urlpatterns =[
re_path(r
'^web/
', ([
re_path(r
'^index/$
', views.index),
re_path(r
'^home/$
', views.home),
], none, none)) 
#]

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