pip 升级到21.0.1 后报错 sys.stderr.write(f”ERROR: {exc}”)

新配置了一个环境，pip默认安装的为21.0.1，使用时直接报如下错误：文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

[root@duoluodeyu ~]# pip install qcloudapi-sdk-python
Traceback (most recent call last):
File "/usr/bin/pip", line 11, in <module>
load_entry_point('pip==21.0.1', 'console_scripts', 'pip')()
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 561, in load_entry_point
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2631, in load_entry_point
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2291, in load
File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2297, in resolve
File "/usr/lib/python2.7/site-packages/pip-21.0.1-py2.7.egg/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

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报错原因：文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

Python 2.7 已于2020年1月1日到期，请停止使用。请升级您的Python，因为不再维护Python 2.7。pip 21.0将于2021年1月停止对Python 2.7的支持。pip 21.0将删除对此功能的支持。文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

解决办法：文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

将pip降级，可以考虑降到pip 20.3.4版本。可执行下面两条指令：文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

wget https://bootstrap.pypa.io/pip/2.7/get-pip.py文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

python get-pip.py文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html

文章源自堕落的鱼-https://www.duoluodeyu.com/2650.html