I am getting an error while creating an extension in Postgresql version 10
could not load library "C:/Program Files/PostgreSQL/10/lib/plpython3.dll": The specified module could not be found
CREATE EXTENSION plpython3u;
Note: Using Postgresql 10 on Window 10
I have struggled a lot with this. For me only worked when I installed the right version of python and added paths to environment variables.
Try version python-3.4.0.amd64 for windows 64bit or other versions from this Python 3.4.0 downloads Link
Environment variables to add: