Django Source Analysis--shotcuts

1 defRender (Request, *args, * *Kwargs):2     """3 Returns a httpresponse whose content is filled with the result of Calling| | The contents of the returned HttpResponse are filled with the result of the call4 django.template.loader.render_to_string () with the passed arguments.5 Uses a requestcontext by default. Use RequestContext by default. 6     """7Httpresponse_kwargs = {8         'Content_Type': Kwargs.pop ('Content_Type', None),9         'Status': Kwargs.pop ('Status', None),Ten     } One 

* *Kwargs The usage is that the input parameter becomes a dictionary
 A     if 'context_instance' inchKwargs: -Context_instance = Kwargs.pop ('context_instance') -         ifKwargs.get ('Current_app', None): the             RaiseValueError ('If You provide a context_instance you must' -                              'set its current_app before calling render ()') -     Else: -Current_app = Kwargs.pop ('Current_app', None) +Context_instance = RequestContext (Request, current_app=Current_app) -  +kwargs['context_instance'] =context_instance A  at     returnHttpResponse (loader.render_to_string (*args, * *Kwargs), -**httpresponse_kwargs)

From django.shotcuts Import Render

1.*args: Multiple parameters can be entered

My. HTML Blog parameters are all part of the args

(2) in the dictionary, in and Has_key usage is the same, but recommended in, Python3 has deleted Has_key

GCA Line 12th

(3) The Pop method of the dictionary: pop[' key ' removes the key and the value of the key; and takes him out.

GCA Line 8th, line 13th

(4) Usage of raise

A =10if  A:    raise valueerror ('a = = ten')

Django Source Analysis--shotcuts