Docker as Python Environment

build.sh

docker build -t krhoyt/hello:1.0 .

Dockerfile

FROM python:latest

WORKDIR /usr/local/bin

COPY requirements.txt .
RUN pip install -r requirements.txt

RUN mkdir input
RUN mkdir output
COPY hello.py .

ENTRYPOINT ["python", "hello.py"]

hello.py

import os
import sys

print( sys.version )

output = "Hello world!"

if len( sys.argv ) == 1:
  if os.path.isfile( "input/name.txt" ):
    file = open( "input/name.txt", "r" )
    content = file.read()
    file.close()
    
    output = "Hello {}!".format( content )
else:
  output = "Hello {}!".format( sys.argv[1] )

file = open( "output/greeting.txt", "a" )
file.write( output )
file.close()

print( output )

run.sh

docker run -ti -v /_absolute_local_path_/input:/usr/local/bin/input -v /_absolute_local_path_/output:/usr/local/bin/output --rm --name hello krhoyt/hello:1.0