Adding the application's entry point

This is the section of this chapter that we all have been waiting for; we are going to create the application entry point and glue together all the pieces of code that we have written so far.

Let's create a file called __main__.py in the currency_converter/currency_converter directory. We have already used the _main__ file before in Chapter 1, Implementing the Weather Application. When we place a file called __main__.py in the module's root directory, it means that that file is the entry script of the module. So, if we run the following command:

python -m currency_converter 

It is the same as running:

python currency_converter/__main__.py

Great! So, let's start adding content to this file. First, add some import statements:

import sys

from .core.cmdline_parser import parse_commandline_args
from .config import get_config...