https://github.com/iritkatriel/cpython/pull/10 - Example Dockerfile

Dockerfile

FROM ubuntu:21.04

RUN apt update
RUN DEBIAN_FRONTEND=noninteractive apt-get install -y wget make clang unzip

#RUN git clone --branch exceptionGroup-stage5 https://github.com/iritkatriel/cpython
RUN wget https://github.com/iritkatriel/cpython/archive/exceptionGroup-stage5.zip

RUN unzip -x *.zip
RUN mv cpython-* cpython

RUN sed -i s/\(3434\)/\(3435\)/g /cpython/Lib/importlib/_bootstrap_external.py
RUN cd cpython && ./configure --prefix=/prefix --exec-prefix=/prefix --without-ensurepip
RUN cd cpython && make -j8 install
COPY test.py /test.py

ENTRYPOINT /prefix/bin/python3 test.py

test.py

try:
    1/0
except *Exception:
    print("Something went wrong")