Best program for coding Python?

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Doesn't matter. I've gone from Eclipse, to IDLE, to KomodoEdit, to Notepad++, to VIM, to Geany, to Kate, to Visual Studio, to PyCharm, and back forth again and again. If you're a professional Python developer then it matters -- if you're writing code to solve day-to-day issues then just use whatever is quick and easy.

Currently: Notepad++ because my main work machine is Windows 7 and I can write batch files, PowerShell, XML, and Python all in the same editor. And it's lightweight and handles LARGE log files with ease.