Robert Rawlins - Think Blue wrote:
> For instance, in my application I have a configuration bean which
> contains all the applications configuration information. Now in one of
> other classes I need access to those configuration settings. What I
> would have done in my ColdFusion/JAVA type applications is create an
> instance of the configuration bean, and then pass that in as an
> argument to the constructor for my other class, then have the other
> class set that as a ‘self’ variable. Then from within my class I can
> access the configuration details like self.config.getName() and it
> would return the name of the application.
>
> How is this best handled in python, can I still inject dependencies as
> a constructor argument like that? If so then is there anything in
> particular I need to watch out for that may cause me trouble?
I would tend to create a config module, rather define a singleton object
that gets passed to every constructor. My configuration loader code
would look something like::
import config
for name, value in get_config_values():
setattr(config, name, value)
And my code that used the configuration settings would look like::
import config
...
foo(config.bar, config.baz)
...
I don't like the idea of adding another argument to every constructor
for application-global configuration information. If it's really
application-global, then use Python's built-in application-global
objects: modules.
STeVe
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