Config Module

[lewisjared]

We need a way of accessing configuration from anywhere within pymagicc in a consistent manner. This state should not be stored in the root __init__.py as that would cause lots of circular dependencies (Module A imports Module B which imports Module A). There is a need to define default config, long-lived somewhat static config and to be able to override these values dynamically. Having a separate module with a simple interface will hide the complexity of this.

Here is how I propose that we lookup configuration variables in other parts of the library. The config object looks like a dict, but it knows how to find the appropriate parameter value.

from  pymagicc.config import config
executable = config['MAGICC6_EXECUTABLE']

Any feedback on the API?

[rgieseke]

settings should be the imported config in the example?

[lewisjared]

That is what I meant!. Edited

[rgieseke]

Done in #32