[matplotlib-devel] plot_directive, context and multiple plots

[Matthew B. <mat...@gm...>]

Hi,

I am happily using `plot_directive`, but I've run into an
inconvenience when using the 'context' option.  Consider this rst
file:

```
#######
A title
#######

.. plot::
    :context:

    import matplotlib.pyplot as plt
    plt.plot(range(10))

Then some text.

.. plot::
    :context:

    plt.figure()
    plt.plot(range(5), 'r')
```

In the second panel you see plots for both the first figure and the
second figure, because the underlying code is making this call:

        fig_managers = _pylab_helpers.Gcf.get_all_fig_managers()

to find all current figures, finding the first and the second figure,
and rendering both.  I think this is unlikely to be what the user
expects (it confused me), but I wasn't sure what the best way to work
round it was.  I considered adding another option like `:myfigs: true`
to the directive which would only pick up figures I create using the
current code block - is there a better way?

Cheers,

Matthew