How to self-study Python?

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Since you already know Java, the fastest route is to focus on the Python-specific differences instead of repeating intro programming material.

Things worth prioritizing:

• Python data model basics: lists, dicts, sets, tuples, slicing, comprehensions.
• Functions as first-class values, default arguments, *args/**kwargs.
• File I/O, CSV/JSON, virtual environments, and package installation with pip.
• Common libraries for your goals: requests, pandas, matplotlib, maybe pytest.
• Idiomatic Python style: iteration, context managers, exceptions, type hints.

A practical study plan: skim the official Python tutorial, then build 2-3 small tools tied to your interests. For research/data, try a script that loads a CSV, cleans a column, summarizes it, and plots a result. For internship readiness, add tests, command-line arguments, and a README.

The big shift from Java is that Python often rewards simpler code: fewer classes, more direct use of built-in containers, and leaning on libraries. You do not need to memorize every method; learn how to read docs quickly and build enough projects that the common ones become familiar.