How hard is it to become a Python expert?

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This depends heavily on if you have any prior programming experience, or are familiar with other procedural/object oriented languages. If you already have some programming experience but none in python, it may take you a year or more to know the standard library well and be able to write clean, idiomatic...
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This depends heavily on if you have any prior programming experience, or are familiar with other procedural/object oriented languages. If you already have some programming experience but none in python, it may take you a year or more to know the standard library well and be able to write clean, idiomatic python. Mastering domain specific python libraries is a whole another ballgame. For instance, if you’re using python for machine learning, then you would master third party libraries like numpy, pandas, tensorflow etc. and the data structures defined therein can be considerably different in performance and semantics than standard python. Or, if you use python for building highly concurrent software then there are other details, libraries (asyncio, futures, celery, twisted etc) that can add to those years to deeply understand and be able to reason about while building large scale systems. read less
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