Cannot submit python script as spark job

[yujhongmicrosoft]

Hello, I am following the command docker run -v $(pwd):/job godatadriven/pyspark /job/samples/word_counter.py with my own python script and am getting this error:
Error: No main class set in JAR; please specify one with --class

In the spark documentation they say:
For Python applications, simply pass a .py file in the place of instead of a JAR,

This is what I'm doing - why am I getting this error?

[NielsZeilemaker]

Hi, could you give me a bit more information? I tried to replicate your error, but couldn't.

I'm running this command locally (on windows):
docker run -v C:\Users\niels\git\pyspark-dockerhub:/job godatadriven/pyspark /job/samples/word_counter.py

To see if your volume mapping is working, you could execute something like:
docker run --entrypoint ls -v C:\Users\niels\git\pyspark-dockerhub:/job godatadriven/pyspark /job
or
docker run --entrypoint ls -v $(pwd):/job godatadriven/pyspark /job