How do you determine which backend is being used by matplotlib?

Question

Either interactively, such as from within an Ipython session, or from within a script, how can you determine which backend is being used by matplotlib?

Answer 1

Another way to determine the current backend is to read rcParams dictionary:

>>> import matplotlib
>>> print (matplotlib.rcParams['backend']) 
MacOSX
>>> matplotlib.use('agg')
>>> print (matplotlib.rcParams['backend']) 
agg