Report any system problems

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System problems

If you are having problems with any of the lab equipment in Rockefeller B3 or B6, please add a note here so that the System Administrator can address the problem. (Please also include your username/netid with your comments in case we need to follow up for more information.)

Other Problems

Personal Machines

If you are trying to run Python and associated packages on your own machine, and are having trouble, please add a note here.

  • matplotlib (pylab) will segfault on Linux if certain fonts are installed (this appears to be an old, known bug that has not been addressed). [cdm89]
    • Workaround: remove OSX fonts from font path. [cdm89]
  • Under Ubuntu 8.10 Alpha 5 (Intrepid Ibex), pylab defaults to writing image files instead of displaying a GUI with your plot. As a result, nothing happens when you call pylab.show(). [cdm89]
    • Workaround: 
      echo "backend : GTKCairo" >> ~/.matplotlib/matplotlibrc
      [cdm89]
  • The cairo backend for matplotlib cannot draw paths with more than 18980 points. This is insufficient for plotting the output of the Gillespie algorithm in the Stochastic Cells exercise with N = 10100. [cdm89]
    • Workaround: 
      echo "backend : GTKAgg" >> ~/.matplotlib/matplotlibrc
      [cdm89]
  • Possible conflict between computational complexity graphics and "ipython -pylab" [cdm89]
    • Segmentation fault
    • Fatal Python error: This thread state must be current when releasing
      Aborted

Preferred Setups

If you are running Python on your own machine and find a setup that you prefer to that recommended on the course website, post the details below.

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