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Python command not working while building python docker file

I need to run a python command while building a docker image. My docker file is as follows

FROM python:3.8.13-slim-buster
RUN /usr/local/bin/python3 -c "import yaml"

When I run docker build . -t hello, I get the following error:

Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM python:3.8.13-slim-buster
---> 289f4e681a96
Step 2/2 : RUN /usr/local/bin/python3 -c "import yaml"
---> Running in 4eb13a1a1e9a
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'yaml'
Solution

  • You need to install the pyyaml package also. You can modify your Dockerfile as below:

    FROM python:3.8.13-slim-buster
RUN /usr/local/bin/pip3 install PyYAML
RUN /usr/local/bin/python3 -c "import yaml"