python - Why can't I update the css in real time after writing it in flask?

Question

The css code has been modified, but when I run the program and check the source code css content it is still a long time ago and has not been updated at all. Is this a deterrent?

曾经蜡笔没有小新 · Answer

Browser cache. Use ctrl+F5 to refresh the page

漂亮男人 · Answer

Browser cache. Set the browser developer mode to disable caching.
If it is chrome, it is as shown below, other browsers are similar.

天蓬老师 · Answer

You need to turn on Flask's debugging mode, set the debug parameter to True, and everything will be fine.