Issue executing python script in Docker

Question

I'm starting with Docker. I have started with a Hello World script in Python 3. This is my Dockerfile:

FROM ubuntu:latest

RUN apt-get update
RUN apt-get install python3


COPY . hello.py


CMD python3 hello.py

In the same directory, I have this python script:

if __name__ == "__main__":
    print("Hello World!");

I have built the image with this command:

docker build -t home/ubuntu-python-hello .

So far, so good. But when I try to run the script with this command:

docker run home/ubuntu-python-hello

I get this error:

/usr/bin/python3: can't find '__main__' module in 'hello.py'

What am I doing wrong? Any advice or suggestion is accepted, I'm just a newbie.

Thanks.

Look like you copy current folder to folder hello.py (in docker container) — Alex Lisovoy
– Alex Lisovoy, Commented Apr 11, 2015 at 17:37
Thank you very much! I though that first argument was the target directory and the second the source! Post it as answer:) — Héctor Valls
– Héctor Valls, Commented Apr 11, 2015 at 17:39

Héctor Valls · Accepted Answer · 2017-06-06 09:54:16Z

2

Thanks to Gerrat, I solved it this way:

COPY hello.py hello.py

instead of

COPY . hello.py

answered Jun 6, 2017 at 9:54

Héctor Valls

26.4k43 gold badges151 silver badges267 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Alex · Accepted Answer · 2016-08-01 19:46:33Z

-1

You need to install python this way and confirm it with the -y.

RUN apt-get update && apt-get install python3-dev -y

answered Aug 1, 2016 at 19:46

Alex

1

1 Comment

ishmaelMakitla Over a year ago

You should really add some explanation as to why this should work - for instance, does the error point to the fact that python is not installed, to which this is a solution?

Collectives™ on Stack Overflow

Issue executing python script in Docker

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related