pip安装pymssql模块时报错“PEP 517”怎样处理？

报错信息

如下图：[root@centos tmp]# pip3 install pymssqlCollecting pymssql Using cached https://files.pythonhosted.org/packages/4a/20/bcd4db9e7990b50e85280f0c9488c0a53f7e6bf9048203448d8e0f29a536/pymssql-3.0.3.tar.gz Installing build dependencies ... done Getting requirements to build wheel ... done Installing backend dependencies ... done Preparing wheel metadata ... doneBuilding wheels for collected packages: pymssql Building wheel for pymssql (PEP 517) ... error ERROR: Command errored out with exit status 1: command: /usr/local/python3/bin/python3.7 /usr/local/python3/lib/python3.7/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmplktlmv2p cwd: /tmp/pip-install-6x1763de/pymssql Complete output (42 lines): running bdist_wheel running build installing to build/bdist.linux-x86_64/wheel running install /tmp/pip-build-env-b2tk6mrs/overlay/lib/python3.7/site-packages/setuptools/dist.py:46: DistDeprecationWarning: Do not call this function warnings.warn("Do not call this function", DistDeprecationWarning) ...(此处略去1000+字)File "/usr/local/python3/lib/python3.7/distutils/cmd.py", line 313, in run_command self.distribution.run_command(command) File "/usr/local/python3/lib/python3.7/distutils/dist.py", line 985, in run_command cmd_obj.run() File "setup.py", line 449, in run raise DeprecationWarning(msg) DeprecationWarning: The pymssql project has been discontinued. To install the last working released version, use a version specifier like "pymssql<3.0". For details and alternatives see: pymssql/pymssql/issues/668ERROR: Failed building wheel for pymssql Running setup.py clean for pymssqlFailed to build pymssqlERROR: Could not build wheels for pymssql which use PEP 517 and cannot be installed directly

遇到问题不要怕，也不要慌，沉着冷静，总有处理方法。

仔细看报错信息，忽然有一条实际上已经告诉了答案。就是版本不匹配，

，那如何才能版本匹配呢？

需要低于3.0版本的pymssql才能安装。

处理命令

命令如下：pip install "pymssql<3.0"pip list

总结

当报错信息是版本不匹配时，按照提醒信息，输入正确的版本限制语法，安装就成功了。