How broad is data science? Is knowing Python enough or what other languages should I be learning?

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Statistics and general data literacy is probably more important than learning more languages. Coding is a means to an end for data science

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Tableau, PowerBI, and Alteryx are important tools too.

Nobody wants to spend all day in matplotlib.

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It all depends on the stats knowledge and the scenario.

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SAS, Stata, R? Every language has its strengths and weaknesses

You may want to clarify your question. If you are asking whether you need to learn other languages such as R or etc.. typically no but that will limit you to those languages. If you are asking that knowing python is enough to become a DS then the answer is no. There is alot of theory as well as practicall knowledge that you must gain to understand how to tackle problems.

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