traceback打印及获取 还有flask相关
import traceback
try:
0/0
except Exception as e:
traceback.print_exec()
s = traceback.format_exec()
flask的应用使用app.py命名
运行时就可以不需要指定
set FLASK_APP=hello (windows)
export FLASK_APP=hello (linux)
调试模式
export FLASK_ENV=development
set FLASK_ENV=development
代码修改后会重启