ver.2 PyGreSQL ERROR: from _pg import * ImportError: DLL load failed: The specified module could not be found

Question

I have the same problem that was discussed here, but I haven\'t credit to comment an answer so I start new question.

I have in PATH way to libpq.dll (C:\\PostgreSql

Answer 1

I got the same error on Win10 with Python 3.5 and Python 3.8, both are 64bit, and Postresql 12, also 64bit. DLL locations "c:\Program Files\PostgreSQL\12\bin" and "c:\Program Files\PostgreSQL\psqlODBC\bin" were added to the PATH but it caused another error:

• "from _pg import * ImportError: DLL load failed: The operating system cannot run %1."

Then I've checked what is going on with Process Monitor from Sysinternals and found that libpg.dll was looking for other DLLs. Finally, the following files:

• libpq.dll
• libssl-1_1-x64.dll
• libcrypto-1_1-x64.dll

were copied from "c:\Program Files\PostgreSQL\12\bin" folder to:

• "c:\Users...\AppData\Local\Programs\Python\Python35"
• "c:\Users...\AppData\Local\Programs\Python\Python38"

folders and now "import pg" works fine in both versions of Python.