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
