Luckily being compatible with Python 3 doesn’t mean replacing code wholesale, with it being possible to modify Python 2.6 code onwards to a form that is also compatible with a Python 3 interpreter.

With 35 million lines of Python code, the Athena trading platform is at the core of JPMorgan's business operations. A late start to migrating to Python 3 could create a security risk.

Will your banking information or other critical data pass through some Python 2 code today? It’s certainly possible, perhaps even likely. It probably won’t even be Python 2.7.18, either.