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Python

Posted by S L
S L
31,336 Points

How come python frameworks like flask dont often break when new version of a dependency is uploaded to PyPI?

When i use a library like flask, by default a version is not specified - so last version seems to be downloaded by default. The same also seems to be true for all the dependencies flask is using.

How is it possible that apps dont break when one of the dependency is updated in PyPI which is not compatible with current app? What exactly triggers that dependency update?