Dependency injection: overriding defaults

[dieter]

Victor Porton <porton at narod.ru> writes:

> I am writing a library, a command line utility which uses the library, and a 
> I am going to use dependency_injector package.
>
> Consider loggers:
>
> For the core library the logger should default to stderr.
>
> For the command line utility, we use the default logger of the library.
>
> For the server, the log should go to a file (not to stderr).
>
> Question: How to profoundly make my software to use the appropriate logger, 
> dependently on whether it is a command line utility or the daemon?

I would distinguish between the common library and distinct
applications (command line utility, daemon). The applications
configure the logging system (differently) while the library uses
uniform logging calls.