Could not translate host name “db” to address using Postgres, Docker Compose and Psycopg2

Question

In one folder I have 3 files: base.py, Dockerfile and docker-compose.yml.

base.py:

import psycopg2

conn = psycopg2.connect(\"dbname=\'b         


        

Answer 1

Another possible scenario,

Check if ports have been used or not by other docker container. Use command:

$ docker container ls --format "table {{.ID}}\t{{.Names}}\t{{.Ports}}" -a

Then change your ports/expose in docker-compose file