How to change the disabled property of put_button in pin_on_change

[kitty-eu-org]

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BUG Description
How to change the disabled property of put_button in pin_on_change,Because put_button doesn't have a name, so I can't change the disabled property through pin_on_change, I try to do it with use_scope, unfortunately it doesn't work, my idea is that with user input, disabled change from True to False, so the user can click this button
A clear and concise description of what the bug is and how to reproduce it.

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Environment Information

• OS and Version: macos
• Browser and Version: chrome
• Python Version: Use python3 --version to view:
• python3.8
• PyWebIO Version: Use python3 -c "import pywebio;print(pywebio.__version__)" to view
• pywebio:1.6.1