1.Flask-SQLAlchemy

虚拟环境添加 Flask-SQLAlchemy 包 图1，点击加号，输入Flask-SQLAlchemy，点击安装

提示错误：

有提示错误：

Traceback (most recent call last):
  File "/Applications/PyCharm.app/Contents/helpers/packaging_tool.py", line 199, in main
    retcode = do_install(pkgs)
  File "/Applications/PyCharm.app/Contents/helpers/packaging_tool.py", line 117, in do_install
    return main(['install'] + pkgs)
TypeError: 'module' object is not callable

安装mysqlclient 提示错误

    ERROR: Command errored out with exit status 1:
     command: /Users/XXXX/FlaskEnv/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/setup.py'"'"'; __file__='"'"'/private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/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 /private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/pip-egg-info
         cwd: /private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/
    Complete output (12 lines):
    /bin/sh: mysql_config: command not found
    /bin/sh: mariadb_config: command not found
    /bin/sh: mysql_config: command not found
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/setup.py", line 16, in <module>
        metadata, options = get_config()
      File "/private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/setup_posix.py", line 61, in get_config
        libs = mysql_config("libs")
      File "/private/var/folders/vd/ws8lqd9x5hd9w0cp_d4gfzd80000gn/T/pip-install-f8nop06c/mysqlclient/setup_posix.py", line 29, in mysql_config
        raise EnvironmentError("%s not found" % (_mysql_config_path,))
    OSError: mysql_config not found
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
 

需要重新安装一下