https://github.com/pallets/werkzeug/issues/1511
ProfilerMiddleware's default filename_format causes ValueError when ProfilerMiddleware is used with...
Environment $ sw_vers ProductName: Mac OS X ProductVersion: 10.13.6 BuildVersion: 17G3025 $ python --version Python 3.7.2 $ pip freeze Click==7.0 Flask==1.0.2...
defaultfilenameformat