Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #17753

Re: Can't I define a decorator in a separate file and import it?

Show key headers only | View raw

Saqib Ali wrote:
> MYCLASS.PY:
> 
> #!/usr/bin/env python
> import os, sys, string, time, re, subprocess
> import Singleton

This should be 'from Singleton import Singleton'


> @Singleton
> class myClass:
>     
>     def __init__(self):
>         print 'Constructing myClass'

At this point, the *instance* of myClass has already been constructed 
and it is now being initialized.  The __new__ method is where the 
instance is actually created.

> 
>     def __del__(self):
>         print 'Destructing myClass'
> 
> 
 > class Singleton:
 >
 >     def __init__(self, decorated):
 >         self._decorated = decorated
 >
 >     def Instance(self):
 >         try:
 >             return self._instance
 >         except AttributeError:
 >             self._instance = self._decorated()
 >             return self._instance
 >
 >     def __call__(self):
 >         raise TypeError(
 >             'Singletons must be accessed through the `Instance`
 > method.')


~Ethan~

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Can't I define a decorator in a separate file and import it? Saqib Ali <saqib.ali.75@gmail.com> - 2011-12-22 12:53 -0800
  Re: Can't I define a decorator in a separate file and import it? Saqib Ali <saqib.ali.75@gmail.com> - 2011-12-22 13:09 -0800
    Re: Can't I define a decorator in a separate file and import it? Ben Finney <ben+python@benfinney.id.au> - 2011-12-23 09:33 +1100
  Re: Can't I define a decorator in a separate file and import it? Andrew Berg <bahamutzero8825@gmail.com> - 2011-12-22 15:20 -0600
  Re: Can't I define a decorator in a separate file and import it? Ethan Furman <ethan@stoneleaf.us> - 2011-12-22 13:31 -0800
  Re: Can't I define a decorator in a separate file and import it? Ethan Furman <ethan@stoneleaf.us> - 2011-12-22 13:07 -0800

csiph-web