title: PyQt does not run with error: This application failed to start because no Qt platform plugin could be initialized
body: <p>I made virtual environment with anaconda and install the pyqt library
  and then wrote some code in pycharm:</p>
  <pre><code>import sys
  from PyQt5.QtWidgets import *
  app = QApplication(sys.argv)
  label = QLabel(&quot;Hello PyQt&quot;)
  label.show()
  app.exec_()
  </code></pre>
  <p>I run the code with my virtual envs and then I get the error message:</p>
  <pre><code>PyQt does not run with error: This application failed to start because no Qt 
  platform plugin could be initialized. Reinstalling the application may fix this 
  problem
  </code></pre>
  <p>I tried to fix this and someone told me that add system environment variable
  so I added it</p>
  <p>variable name: QT_QPA_PLATFORM_PLUGIN_PATH
  variable value: C:\ProgramData\Anaconda3\envs\py36_32\lib\site-packages\PyQt5\Qt\plugins\platforms</p>
  <p>but it did not fix the problem and error message changed:</p>
  <pre><code>This application failed to start because it could not find or load the
  Qt platform plugin &quot;windows&quot; in
  C:\ProgramData\Anaconda3\envs\py36_32\lib\site-packages\PyQt5\Qt\plugins\platforms
  Reinstalling the application may fix this problem
  </code></pre>
  <p>and I also recongnized that there is no such directory C:\ProgramData\Anaconda3\envs\py36_32\lib\site-packages\PyQt5 exist but there is no Qt folder in PyQt5</p>