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Rio, a Python-based web development framework, has introduced a new layouting system in pure Python. This innovative system allows developers to create responsive and flexible layouts without the need for CSS. The reference layouting system uses an algorithm that distributes available space proportionally among components, ensuring that each component has enough space to fit its content. Rio's layout system is not only powerful but also flexible, allowing developers to focus on building their apps rather than worrying about layout details.
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Source: https://dev.to/p4nd4no/rio-webapps-in-pure-python-a-fresh-layouting-system-23p3