title: ImportError while import a Python file in the same folder
body: <p>I'm working in a Python 3 project using Pycharm and I have a problem importing a file. This is my project structure:</p>
  
  <pre><code>twixer
    |----- docs
    |----- twixer
             |----- __init__.py
             |----- config.ini
             |----- facepp.py
             |----- twixer.py
    |----- setup.py
  </code></pre>
  
  <p>In twixer.py I have the next line:</p>
  
  <pre><code>import twixer.facepp
  </code></pre>
  
  <p>But that line throws this error when I run the project:</p>
  
  <pre><code>Traceback (most recent call last):
    File "&lt;frozen importlib._bootstrap&gt;", line 2218, in _find_and_load_unlocked
  AttributeError: 'module' object has no attribute '__path__'
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "D:/Users/David/PycharmProjects/twixer-py/twixer/twixer.py", line 2, in &lt;module&gt;
      import twixer.facepp
    File "D:\Users\David\PycharmProjects\twixer-py\twixer\twixer.py", line 2, in &lt;module&gt;
      import twixer.facepp
  ImportError: No module named 'twixer.facepp'; 'twixer' is not a package
  </code></pre>
  
  <p>I have no idea about how to solve this problem. I tried to change the way I import the file without luck. What is the problem? How can I fix it?</p>