Josef Heinen - Scientific Visualization with GR [EuroPython 2014] [25 July 2014] Python developers often get frustrated when managing visualization packages that cover the specific needs in scientific or engineering environments. The GR framework could help. GR is a library for visualization applications ranging from publication-quality 2D graphs to the creation of complex 3D scenes and can easily be integrated into existing Python environments or distributions like Anaconda. ----- Python has long been established in software development departments of research and industry, not least because of the proliferation of libraries such as *SciPy* and *Matplotlib*. However, when processing large amounts of data, in particular in combination with GUI toolkits (*Qt*) or three-dimensional visualizations (*OpenGL*), it seems that Python as an interpretative programming language may be reaching its limits. --- *Outline* - Introduction (1 min) - motivation - GR framework (2 mins) - layer structure - output devices and capabilities - GR3 framework (1 min) - layer structure - output capabilities (3 mins) - high-resolution images - POV-Ray scenes - OpenGL drawables - HTML5 / WebGL - Simple 2D / 3D examples (2 min) - Interoperability (PyQt/PySide, 3 min) - How to speed up Python scripts (4 mins) - Numpy - Numba (Pro) - Animated visualization examples (live demos, 6 mins) - physics simulations - surfaces / meshes - molecule viewer - MRI voxel data - Outlook (1 min) *Notes* Links to similar talks, tutorials or presentations can be found [here][1]. Unfortunately, most of them are in German language. The GR framework has already been presented in a talk at PyCon DE [2012][2] and [2013][3], during a [poster session][4] at PyCon US 2013, and at [PythonCamps 2013][5] in Cologne. The slides for the PyCon.DE 2013 talk can be found [here][6]. As part of a collaboration the GR framework has been integrated into [NICOS][7] (a network-based control system completely written in Python) as a replacement for PyQwt. [1]: http://gr-framework.org/ [2]: https://2012.de.pycon.org/programm/schedule/sessions/54 [3]: https://2013.de.pycon.org/schedule/sessions/45/ [4]: https://us.pycon.org/2013/schedule/presentation/158/ [5]: http://josefheinen.de/rasberry-pi.html [6]: http://iffwww.iff.kfa-juelich.de/pub/doc/PyCon_DE_2013 [7]: http://cdn.frm2.tum.de/fileadmin/stuff/services/ITServices/nicos-2.0/dirhtml/