I follow this [instruction][1] to create a standalone script in pycharm.

The thing I do differently is I download standalone installer not the network installer. 

Code is from [pyqgis_developer_cookbook][2].

    from qgis.core import *
    QgsApplication.setPrefixPath(r"C:\Program Files\QGIS 3.4\apps\qgis", True)
    qgs = QgsApplication([], False)
    qgs.initQgis()
    qgs.exitQgis()

But when it runs to "qgs = QgsApplication([], False)" , a error pops up.
[![enter image description here][3]][3]

Please tell me how to solve this, thanks.


  [1]: http://spatialgalaxy.net/2018/02/13/quick-guide-to-getting-started-with-pyqgis3-on-windows/
  [2]: https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/intro.html#id7
  [3]: https://i.sstatic.net/qFtOB.jpg