In standalone python script from qgis._core import * produces ImportError: DLL load failed: The specified module could not be found

[qgib]

Author Name: Raphael Dumas (@radumas)
Original Redmine Issue: 16042
Affected QGIS version: 2.14.9
Redmine category:python_plugins

---

In Windows 7 x64 SP1 using Python 2.7 x64, I installed QGIS 2.14.9 from the standalone x64 installer. I was trying to set up a python virtual environment to develop standalone app (http://gis.stackexchange.com/a/223325/36886). I added the following paths to a @.pth@ file in the environment's site-packages:

C:\\Program Files\\QGIS Essen\\apps\\qgis-ltr\\python
C:\\Program Files\\QGIS Essen\\apps\\Python27\\
C:\\Program Files\\QGIS Essen\\apps\\Python27\\Lib\\
C:\\Program Files\\QGIS Essen\\apps\\Python27\\Lib\\site-packages
C:\\Program Files\\QGIS Essen\\bin
C:\\Program Files\\QGIS Essen\\include
C:\\Program Files\\QGIS Essen\\apps\\qgis-ltr\\bin

But when I type @from qgis.core import *@, python tries to import @qgis._core@ and fails with

ImportError: DLL load failed: The specified module could not be found

Having a look at the @qgis/_core.pyd@ file with DependencyWalker produces the attached output image

---

• dp_walker_qgis.PNG (Raphael Dumas)

[qgib]

Author Name: Raphael Dumas (@radumas)

---

Sorry, fired off this issue a little prematurely.

I resolved the import error by adding the following to my PATH variable.

C:\\Program Files\\QGIS Essen\\apps\\qgis-ltr\\bin
C:\\Program Files\\QGIS Essen\\bin

Though I would highlight that just adding @C:\Program Files\QGIS Essen@, as the documentation suggested, didn't work. http://docs.qgis.org/2.14/en/docs/pyqgis_developer_cookbook/intro.html#running-custom-applications

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)

---

Thanks for posting this followup.

Would you mind improving the description in the cookbook?

It should be trivial to create a improvement proposal (pull request) using the online editor here:
https://github.com/qgis/QGIS-Documentation/blob/master/source/docs/pyqgis_developer_cookbook/intro.rst

Thank you in advance!

---

• status_id was changed from Open to Closed