Archive for the 'Python' category

PyXLL: Deploy Python to Excel Easily

Feb 06 2014 Published by under Canopy, Enthought Canopy, Finance, News, Python, PyXLL

PyXLL Solution Home | Download PyXLL | Press Release

Today Enthought announced that it is now the worldwide distributor for PyXLL, and we’re excited to offer this key product for deploying Python models, algorithms and code to Excel. Technical teams can use the full power of Enthought Canopy, or another Python distro, and end-users can access the results in their familiar Excel environment. And it’s pretty straightforward to set up and use.

PyXLL is free for non-commercial and evaluation purposes, and in Canopy you can simply grab it from the Enthought repo via the Package Manager as shown in the screenshots below (note that at this time PyXLL is only available for Windows users). The rest of the configuration instructions are in the Quick Start portion of the documentation. PyXLL itself is a plug-in to Excel. When you start Excel, PyXLL loads into Excel and reads in Python modules that you have created for PyXLL. This makes PyXLL especially useful for organizations that want to manage their code centrally and deploy to multiple Excel users.

Enthought Canopy Package Manager   Install PyXLL from Enthought Canopy's Package Manager

To create a PyXLL Python Excel function, you use the @xl_func decorator to tell PyXLL the following function should be registered with Excel, what its argument types are, and optionally what its return type is. PyXLL also reads the function’s docstring and provides that in the Excel function description. As an example, I created a module my_pyxll_module.py and registered it with PyXLL via the PyXLL config file. In that module I put a simple function pyfib(): a naive Fibonacci implementation.

When I start Excel, I can access the Excel function wizard and find my pyfib() function and use it. The function documentation in Excel comes from my docstring. PyXLL parses the “n: integer input” portion as the variable documentation.

If I go back and make a change to the function, I can reload PyXLL without restarting Excel and update the cells. If I add another function to my module, it too will get loaded and be available to use in my worksheet.

So if you are developing Python models or functions for a large number of distributed Excel users, you can manage the code centrally. PyXLL will load new versions and new functions from the central repository whenever a user starts Excel. Deployment is very straightforward, and central management of all the code reduces the risk of Excel macros and functions proliferating uncontrolled.

I can also create menu functions using the decorator @xl_menu. PyXLL ships with several examples that you can start with. The one below adds a menu item to the Excel Add-in menu, and pops up a message box when selected.

       

As I said earlier, PyXLL is free to download for non-commercial and evaluation purposes. In Canopy it’s available in the Package Manager (as long as you upgrade to Canopy v1.3 first), and for other Python distros it’s available from our PyXLL store page. You can also find more details and documentation on the PyXLL product pages.

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Enthought Canopy v1.2 is Out: PTVS, Mavericks, and Qt

Author: Jason McCampbell

Canopy 1.2 is out! The release of Mac OS “Mavericks” as a free update broke a few features, primarily IPython, so we held the release to try to make sure everything worked. That ended up taking longer than we wanted, but 1.2 is finally out and adds support for Mavericks. There is one Mavericks-specific, Qt font issue that we are working on correcting which causes the wrong system font to be selected so UI’s look less-nice than they should.

Enthought Canopy integrated into PTVS

Enthought Canopy integrated into PTVS

The biggest new feature is integration with Microsoft’s Python Tools for Visual Studio (PTVS) package. PTVS is a full, professional-grade development IDE for Python based on Visual Studio and provides mixed Python/C debugging. The ability to do mixed-mode debugging is a huge boon to software developers creating C (or FORTRAN) extensions to Python. Canopy v1.2 includes a custom DLL that allows us to integrate more completely with PTVS and solves some issues with auto-completion of Python standard library calls.

Beyond PTVS, we have added the Qt development tools, such as qmake and the UIC compiler, to the Canopy installation tree. These tools are available on all platforms now and enable Qt developers to access them from Canopy directly rather than having to build the tools themselves.

Canopy 1.2 includes a large number of smaller additions and stability improvements. Highlights can be found in the release notes and we encourage all users to update existing installs. As always, thanks for using Canopy and please don’t hesitate to drop us a note letting us know what you like or what you would like to see improved. You can contact us via the Help -> Suggestions/Feedback menu item or by sending email to canopy.support@enthought.com.

And you can download Canopy from the Enthought Store page.

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