Getting error on running docker-compose up - python-3.x

Question

I am trying to run my python code through docker-compose. It is not a flask app so I didn't provide a port number on my yml file. Here is my docker-compose.yml file:
version: '3'
services:
main:
build: .
image: ddn4
environment:
- neo4j_uri=bolt://54.209.5.141:7687
- neo4j_username=neo4j
- password=provis234
- blob_conn_string=httpsxxxx
main.py is my python code. After running
docker-compose build
, I get that an image was successfully built. Also, upon checking using
docker images
, I see that the image ddn4 was built successfully. But upon running
docker-compose up
, I am getting the following error:
main_1 | Error !!!! File Exception:
main_1 | 'function' object is not subscriptable
main_1 | Error !!!!:
main_1 | 'NoneType' object has no attribute 'columns' dd-n4_main_1 exited with code 0
dd-n4 is the location of my dockerfile, requirements.txt, python codes and docker-compose.yml file.
Here is the python code for the variables which seem to be causing the error:
def neo4jconn():
"""
This code is to create a connection string for connecting to Neo4j
"""
try:
neo_conn = Graph(os.getenv['neo4j_uri'], user=os.getenv['neo4j_username'], password=os.getenv['password'])
return neo_conn
except Exception as ex:
print('Error !!!!:')
print(ex)

Answer 1

You cannot use both build and image statement.
If you use build the built image will automatically be used !

Answer 2

try to use docker-compose up for running docker-compose.yml file, if you would like to re-build it add --build flag, detach mode add -d, it looks like:
docker-compose up -d --build
you can pass all of the environment variables to .env file and install additionaly python-dotenv:
pip install python-dotenv
and pass it to docker-compose:
youre_service:
image: image:1.7
container_name: container
env_file:
- .env

Answer 3

I was able to get it resolved by updating my python code to use os.getenv() instead of os.getenv[]. Thanks #David Maze