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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Why can not initialize the class?
Date: Fri, 22 Aug 2014 19:20:19 -0400
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Xref: csiph.com comp.lang.python:76830

On 8/22/2014 10:26 AM, luofeiyu wrote:
> System:win7+python34.
>
>      class Contact(object):
>          def __init__(self, first_name=None, last_name=None,
>                       display_name=None, email=None):
>              self.first_name = first_name
>              self.last_name = last_name
>              self.display_name = display_name
>              self.email = email
>          def print_info(self):
>              print(self.display_name, "<" + self.email + ">"  )
>          def set_email(self, value):
>              if '@' not in value:
>                  raise Exception("This doesn't look like an email
> address.")
>              self._email = value
>          def get_email(self):
>              return self._email
>          email = property(get_email, set_email)
>
>      contact = Contact()

By posting code with an extra indent, you make it imposible to run by 
just cutting and pasting. You should already know that.

-- 
Terry Jan Reedy