我尝试在Docker中安装requirements.txt文件，当我尝试安装importlib时，我在中安装了大约30个包，并收到了以下错误：
无法执行setup.py，因为setuptools在建置环境中无法使用。
以下是完整的错误消息：

Collecting importlib==1.0.4

# 9 14.42   Downloading importlib-1.0.4.zip (7.1 kB)

# 9 14.43   Preparing metadata (setup.py): started

# 9 14.45   Preparing metadata (setup.py): finished with status 'error'

# 9 14.45   error: subprocess-exited-with-error

# 9 14.45

# 9 14.45   × python setup.py egg_info did not run successfully.

# 9 14.45   │ exit code: 1

# 9 14.45   ╰─> [1 lines of output]

# 9 14.45       ERROR: Can not execute `setup.py` since setuptools is not available in the build environment.

# 9 14.45       [end of output]

# 9 14.45

# 9 14.45   note: This error originates from a subprocess, and is likely not a problem with pip.

# 9 14.45 error: metadata-generation-failed

# 9 14.45

# 9 14.45 × Encountered error while generating package metadata.

# 9 14.45 ╰─> See above for output.

# 9 14.45

# 9 14.45 note: This is an issue with the package mentioned above, not pip.

# 9 14.45 hint: See above for details.

在Dockerfile中，我尝试在安装软件包之前安装setuptools：

RUN python3 -m pip install setuptools
RUN python3 -m pip install -r requirements.txt

更多详情：我的python版本是3.9，pip版本是22.1.2
当我这样做

easy_install --version

，我拿

setuptools 41.0.1 from /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (Python 2.7)

但是，当我试图用pip安装setuptools时，它说我有python3. 9的62. 3. 3版本

Requirement already satisfied: setuptools in /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages (62.3.3)

任何帮助都是非常感谢的，让我知道如果我应该提供任何进一步的细节。