所以我试图做一个pip3安装flask-swagger-ui，但是我收到了以下错误：
Defaulting to user installation because normal site-packages is not writeable
Collecting flask-swagger-ui
Using cached flask-swagger-ui-3.25.0.tar.gz (521 kB)
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-n64v6bxi/flask-swagger-ui/setup.py'"'"'; __file__='"'"'/tmp/pip-install-n64v6bxi/flask-swagger-ui/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-n64v6bxi/flask-swagger-ui/pip-egg-info
cwd: /tmp/pip-install-n64v6bxi/flask-swagger-ui/
Complete output (3 lines):
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: No module named 'setuptools'
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
请帮助