带有太多默认值参数的 Python 函数，如何使它更干净？

Question

我有以下函数签名，它看起来真的很丑，我该怎么做才能让它看起来更干净？

def contact(
  request, sender=settings.DEFAULT_FROM_EMAIL,
  subj_tmpl='contato/subject.txt',msg_tmpl='contato/msg.html',
  template='contato/contato.html', success_template='contato/success.html',
  success_redir='/',append_message=None,):

Answer 1

如果我是你，我想我会这样做:

def contact(request, sender=None, append_message=None, context=None):

   if not sender:
       sender = settings.DEFAULT_FROM_EMAIL  # i hope that you can access settings here

   # The context arg is a dictionary where you can put all the others argument and 
   # you can use it like so :

   subj_tmpl = context.get('subj_tmpl', 'contato/subject.txt')
   # ....

希望对您有所帮助。