python flask运行时提示出错了

Answer 1

Try changing the startup mode to debug where the flask app is started.

app.run(debug=True)

You can print out the error reason.

Answer 2

Why should you use livereload？Flask自带reload机制的，修改代码以后保存就会reload。所以你直接app.run()?

Answer 3

f.save(path.join(upload_path, secure_filename(f.filename)))
# Compare the difference between my code and the corresponding code there, thank you!