Hi, I've installed matplotlib (v 0.87.6_0) via macports (os x 10.4.8, python 2.4.3). I've tried following the "interactive" instructions at matplotlib.sourceforge.net/interactive.html, which tells me to modify matplotlibrc as follows: interactive : True backend : TkAgg My general usage is via ipython -pylab, which should automatically setup the necessary extra thread for plotting, but I've seen similar behavior in vanilla python shells as well. I can run matplotlib commands (e.g. plot([1,2,3])) but plot windows are never shown (even after I explicitly call show()). I can save the figure and view it as a pgn, so much is working. When I configure matplotlibrc via the rec'd TkAgg backend, I get the following error: Traceback (most recent call last): File "/opt/local/bin/ipython", line 28, in ? IPython.Shell.start().mainloop() [snip] File "/opt/local/lib/python2.4/site-packages/matplotlib/backends/ backend_tkagg.py", line 8, in ? import tkagg # Paint image to Tk photo blitter extension File "/opt/local/lib/python2.4/site-packages/matplotlib/backends/ tkagg.py", line 1, in ? import _tkagg ImportError: No module named _tkagg A google search led me to believe I didn't have "the proper tcl-dev/ tk-dev" directories. I then noticed there was a +gt2k macports matplotlib variant, and found another search snippet that led me to believe installing this new variant might relieve my woes. No such luck. Has anyone gotten matplotlib to plot figures interactively in the macports/python24 setting? Advice greatly appreciated. --b