The Python ecosystem is huge : matplotlib, numpy, scipy, panda, sympy, Scikit-Learn, celery, flask, sqlalchemy, airflow, sentry, scrapy, gevent, gunicorn, dask, pygments, docker-compose

I don't know if Python is important but it is a very good programming language to learn how to program since the code writing is very close of the original algorithm and since it is very simple (no problem of memory or of variable type). But to understand how the memory access works, it is not the best ;-)

Arguments: - speed of development - readability - huge standard library - integration - rapid prototyping - is fast - huge number of users / popularity / healthy community - most popular language in data science - has big corporate sponsors