Project Jupyter is an open source project allowing to run Python code in a web browser, focusing to support interactive data science and scientific computing not only for Python but across all programming languages. It is a spin-off from IPython I blogged about here.
Typically you would have to install Jupyter and a full stack of Python packages on your computer and start the Jupyter server to get started.
But there is also an alternative available in the web where you can run IPython notebooks for free: https://try.jupyter.org/
This site does not allow you to save your projects permanently but you can export projects and download and also upload notebooks from your local computer.
IPython notebooks are a great way to get started with Python and learn the language. It makes it easy to run your script in small increments and preserves the state of those increments aka cells. It also nicely integrates output into your workflow including graphical plots created with packages like matplotlib.pyplot, and it comes with some primitive markup language to add documentation to your scripts.
The possibilities are endless with IPython or Jupyter - to learn Python as a language or data analysis techniques.
I was inspired by this video on IBM developerWorks to again get started with this: "Use data science to up your game performance". And the book "Learning IPython for Interactive Computing and Data Visualization - Second Edition" by Cyrille Rossant is the source where I got this tip from about free Jupyter in the web.
Of course you can also sign up for a trial on IBMs Bluemix and start a IBM Data Science Experience project.
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