IPython code migration from Python 2 to Python 3

Question

Because of SciPy, I have stuck with Python 2 even though I would like to move to Python 3. As most of my research work is data analysis and modelling, I have used the IPython HTML notebook in my day-to-day work. However, that means I've become used to the Python 2 syntax (e.g. print x), which frequently comes up in my sanity-checking steps.

Now that SciPy seems to be Python 3-compatible (please correct me if I'm wrong), I'd like to migrate over from Python 2 to Python 3.

However, that means most of my IPython notebooks will be riddled with Python 2 print statements, which will yield tons of errors each time I re-run analyses through them.

So here's my question: Is 2to3 capable of modifying the IPython HTML notebooks? Logistical challenge: I have ~30-40 of them now, scattered in different project folders. If 2to3 is not the correct solution, should I do something else?

You are correct that there's no automated tool that works on the HTML notebooks yet. This is discussed in the issue tracker here: github.com/swcarpentry/bc/issues/107 The .ipynb files are text files that you could parse with a script that takes care of this 2to3 conversion, though it may not necessarily be trivial. The thread indicates that the issue will be revisited in 2014. — treddy
– treddy, Commented Dec 18, 2013 at 7:04

João Abrantes · Accepted Answer · 2017-01-27 10:21:03Z

2

You can use this script 2to3_nb.py. Just run it like this: python 2to3_nb.py <path_to_folder_containing_notebooks>.

answered Jan 27, 2017 at 10:21

João Abrantes

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Minu Over a year ago

Suppose I have a full project that has notebooks coded in Python 2.7. I want to convert all of them to Python 3. If I run: python 2to3_nb.py <my_project_folder>, will it convert and replace all the notebooks in <my_project_folder> with Python 3 code?

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