title: Formatter black is not working on my VSCode...but why?
body: <p>I have started using Python and Django and I am very new in this field.
  And this is my first time to ask a question here...I do apologise in advance if there is a known solution to this issue...</p>
  <p>When I installed and set VSCode formatter 'black' (after setting linter as flake8), the tutorial video tutor's side shows up pop-up like 'formatter autopep8 is not installed. install?'. &amp; Mine did not show up that message.</p>
  <p>So what I did was...</p>
  <ol>
  <li>manually input 'pipenv install flack --dev --pre' on terminal.</li>
  <li>manually input &quot;python.formatting.provider&quot;: &quot;black&quot;, to 'settings.json' on '.vscode' folder.</li>
  <li>Setting(VSCode) -&gt; flake8, Python &gt; Linting: Flake8 Enabled (Also modified in: workspace), (ticked the box) Whether to lint Python files using flake8</li>
  </ol>
  <p>The bottom code is from settings.json (on vscode folder).</p>
  <pre><code>
  {
    &quot;python.linting.pylintEnabled&quot;: false,
    &quot;python.linting.flake8Enabled&quot;: true,
    &quot;python.linting.enabled&quot;: true,
    &quot;python.formatting.provider&quot;: &quot;black&quot;, # input manually
    &quot;python.linting.flake8Args&quot;: [&quot;--max-line-length=88&quot;] # input manually
  }
  
  
  </code></pre>
  <p>I found a 'black formatter' document. <a href="https://github.com/psf/black" rel="noreferrer">https://github.com/psf/black</a> &amp; it stated...
  python -m black {source_file_or_directory} &amp; I get the following error message.</p>
  <pre><code>
      Usage: __main__.py [OPTIONS] [SRC]...
  Try '__main__.py -h' for help.
  
  Error: Invalid value for '[SRC]...': Path '{source_file_or_directory}' does not exist.
  
  </code></pre>
  <p>Yes, honestly, I am not sure which source_file_or_directory I should set...but above all now I am afraid whether I am on the right track or not.</p>
  <p>Can I hear your advice? At least some direction to go, please.
  Thanks..</p>