我需要创建一个Docker镜像，它包含两个版本的Python，比如3.9和3.10。
我们的想法是安装两个版本的Python，然后安装Python 3.9的pip/wheel/lib目录，因为它是我们想要使用的默认版本。然后我创建了指向pip/wheel/lib目录的sys链接。
然后使用.sh脚本，我们将通过build参数传递Python版本，并使用该ARG，我们将选择Python的替代版本，本例为10，这将使3.10版本成为构建使用的版本。
但我不确定最好的方法是什么，dockerfile。
我的Dockerfile看起来像这样：

COPY --from=python1 --chown=developer:developer /usr/local/bin/py* /usr/local/bin/
COPY --from=python1 --chown=developer:developer /usr/local/bin/pip* /usr/local/bin/
COPY --from=python1 --chown=developer:developer /usr/local/bin/wheel /usr/local/bin/
COPY --from=python1 --chown=developer:developer /usr/local/lib/lib* /usr/local/lib/

RUN for link in /usr/local/bin/py* /usr/local/bin/pip* /usr/local/bin/wheel /usr/local/lib/lib*; do \
        [ -e "$link" ] || ln -s "$link" /usr/local/bin/; \
    done

# Copy Base Python Version
COPY --from=python1 --chown=developer:developer /usr/local/lib/python3.9/ /usr/local/lib/python3.9/

# Copy Alternative Python Version
COPY --from=python2 --chown=developer:developer /usr/local/lib/python3.10/ /usr/local/lib/python3.10/

# Copy the version-switching script
COPY sagacity-cd/swap.sh /usr/local/bin/

# Run the script to set the default version based on the build argument
USER root
RUN chmod +x /usr/local/bin/swap.sh && \
    /usr/local/bin/swap.sh ${DEFAULT_PYTHON_VERSION}
USER developer

# Copy the version-switching script
COPY sagacity-cd/swap.sh /usr/local/bin/

# Run the script to set the default version based on the build argument
USER root
RUN chmod +x /usr/local/bin/swap.sh && \
    /usr/local/bin/swap.sh ${DEFAULT_PYTHON_VERSION}
USER developer

字符串
我的swap.sh看起来像这样：

#!/bin/bash

if [ "$1" == "3.9" ]; then
    rm /usr/local/bin/python
    ln -s /usr/local/bin/python3.9 /usr/local/bin/python
elif [ "$1" == "3.10" ]; then
    rm /usr/local/bin/python
    ln -s /usr/local/bin/python3.10 /usr/local/bin/python
else
    echo "Invalid version specified. Usage: $0 [3.9|3.10]"
    exit 1
fi

型