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Python's integers and floats look similar but behave differently, and mixing them carelessly leads to silent errors in financial calculations. Learn how to handle numbers correctly, when to use Decimal for money, and the pitfalls that catch most practitioners.
Jupyter Notebook is where finance practitioners solve real problems with Python. It gives you immediate feedback on your code, lets you document your logic as you work, and creates an audit trail that regulators and auditors actually want to see.