How to Resolve \"pg_config\" Errors During psycopg2 Installation with \"pip\"?

How to Install psycopg2 with "pip" on Python

Problem

I'm using virtualenv to install the psycopg2 package, but I'm encountering errors related to the "pg_config" executable. The installation process hangs at the setup.py phase, leaving me wondering if I'm missing any crucial steps.

Answer

Installing psycopg2 via PyPI Package

• Option 1: Install the psycopg2-binary PyPI package, which provides Python wheels for Linux and Mac OS. This eliminates the need for building the package from source.

pip install psycopg2-binary

Installing Prerequisites for Building psycopg2

• Option 2: If binary wheels are not available for your system, you can install the prerequisites for building psycopg2 from source. The specific commands vary depending on your operating system and Python version.

Debian/Ubuntu

Python Version	Command	Note
Default Python 3	sudo apt install libpq-dev python3-dev
Python 3.x	sudo apt install libpq-dev python3.x-dev	Substitute x in the command
Python 2	sudo apt install libpq-dev python-dev

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