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How it works...
In the preceding code, first, the instance folder is loaded from the given path, and then, the configuration file is loaded from the file named config.cfg in the given instance folder. Here, silent=True is optional and is used to suppress the error if config.cfg is not found in the instance folder. If silent=True is not given and the file is not found, then the application will fail, giving the following error:
IOError: [Errno 2] Unable to load configuration file (No such file
or
directory): '/absolute/path/to/config/file'
It might seem that loading the configuration from the instance folder using instance_relative_config is redundant work and could be moved to one of the configuration methods itself. However, the beauty of this process lies in the fact that the instance folder concept is completely independent of configuration, and instance_relative_config just complements the configuration object.