imshow can't find any plugins without initially calling use_plugin

[lebedov]

Using the latest revision of scikits.image 0.3dev as of the submission date of this issue, scikits.image.io.imshow() can't find any plugins when I attempt to use it to display an ndarray without initially running use_plugin() to activate a particular plugin. Is this expected behavior? The existence of a plugin argument in the imshow function seems to imply that one shouldn't need to explicitly call use_plugin() before imshow().

[stefanv]

I added imshow to the PIL plugin. Please review

http://github.com/stefanv/scikits.image/tree/io

before I integrate it into the master branch.

[lebedov]

It appears to work fine.

[lebedov]

My question involving the need to initially run use_plugin() before being able use something other than the default plugin still stands, though; without doing so,
scikits.image.io._plugins.plugin.plugin_store only contains the null and pil plugins. Shouldn't that dictionary contain all of the existing plugins by default?

[stefanv]

Some plugins are not safe to load by default (for example, the Qt and Gtk plugins cannot be loaded at the same time). I can update the docstring to say that at least the PIL plugin will be tried by default.

[lebedov]

Sure, although it might also be useful to make note of the fact that certain plugins cannot be loaded simultaneously (e.g., perhaps in the documentation).