title: How to run a Python package with one command line
body: <p>I'm a newbie in Python. And I don't know how to run a python package with only one command line. I have been searched it on GG but I have no key-word. 
  There is my folder:</p>
  
  <pre><code>├── config.json
  └── my_source
      ├──__init__.py
      ├──filter.py
      └──get_new_users.py
  </code></pre>
  
  <p>And config.json contains 3 parameters and able change by the user. So, I want to run this my_source package with one command line like this:</p>
  
  <blockquote>
    <p>my_source -c config.json</p>
  </blockquote>
  
  <p>Could I able to run my code in this way? 
  If it's possible. Could anyone give me a key-word or a way to do it? If you need more info, please leave a comment. Thank you.  </p>