Yeah, I tried that. Here's what I'm doing. I have an application which displays different dataset which a user selects from a drop down list. I want to overwrite the existing plot with a new one. I've tried deleting just about everything get matplotlib to let go of my data!
Mathew On Thu, Nov 19, 2009 at 10:30 AM, John Hunter <[email protected]> wrote: > > > > > On Nov 19, 2009, at 11:57 AM, Robert Kern <[email protected]> wrote: > > > On Thu, Nov 19, 2009 at 11:52, Mathew Yeates <[email protected]> > > wrote: > >> There is definitely something wrong with matplotlib/numpy. Consider > >> the > >> following > >>> from numpy import * > >>> mydata=memmap('map.dat',dtype=float64,mode='w+',shape=56566500) > >>> del mydata > >> > >> I can now remove the file map.dat with (from the command line) $rm > >> map.dat > >> > >> However > >> If I plot mydata before the line > >>> del mydata > >> > >> > >> I can't get rid of the file until I exit python!! > >> Does matplotlib keep a reference to the data? > > > > Almost certainly. > > > >> How can I remove this > >> reference? > > > > Probably by deleting the plot objects that were created and close all > > matplotlib windows referencing the data. If you are using IPython, you > > should know that many of the returned objects are kept in Out, so you > > will need to clear that. There might be some more places internal to > > matplotlib, I don't know. > > > > Closing the figure window containg the data *should* be enough. In > pylab/pyplot, this also triggers a call to gc.collect. > > > > > > With some care, you can use gc.get_referrers() to find the objects > > that are holding direct references to your memmap. > > > > -- > > Robert Kern > > > > "I have come to believe that the whole world is an enigma, a harmless > > enigma that is made terrible by our own mad attempt to interpret it as > > though it had an underlying truth." > > -- Umberto Eco > > _______________________________________________ > > NumPy-Discussion mailing list > > [email protected] > > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ > NumPy-Discussion mailing list > [email protected] > http://mail.scipy.org/mailman/listinfo/numpy-discussion >
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