enable_pylab(import_all=False) still imports np

[asmeurer]

In SymPy, we use ip.enable_pylab(import_all=False). But it seems that it still imports np. I didn't check if any other names are accidentally imported as well.

[minrk]

I think there are probably a few. We should finally make a clean split between the eventloop hookup and the namespace population, which should make it more obvious that we are doing things correctly.

[takluyver]

The import_all flag controls whether or not we do from matplotlib.pylab import *; from numpy import *, but we unconditionally import numpy, matplotlib, pylab, mlab and pyplot. See this function.

I agree that that's not terribly clear - I had also assumed that setting import_all to False would result in nothing being added to the user namespace. Can we just repurpose the existing parameter, or should we add a second one, like import_packages?

[asmeurer]

Repurpose the existing name, I would say.

[minrk]

#3568 should implement this change - now import_all=False should result in no names added to user_ns.