用终端安装pymssql没有成功，
查询网络上的解决办法：
1. brew unlink freetds
2. brew install [email protected]
3. brew link –force [email protected]
4. pip install pymssql
安装依然报错：
Building wheel for pymssql (PEP 517) ... error.......
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:
https://github.com/pymssql/pymssql/issues/668
----------------------------------------
ERROR: Failed building wheel for pymssql
报错信息说明安装的版本需要3.0以下的
所以此时安装的命令为：
pip install "pymssql<3.0"