Sajec,> Is there a simple way to grab x,y coordinates from active
Sajec,> plot in a manner similar to using matlab's ginput()
Sajec,> function?
It depends on what you mean by simple 
matplotlib provides a GUI independent way to capture basic events, eg
to get the mouse coordinates in screen and data units and button
clicks, key presses, etc.
See http://matplotlib.sourceforge.net/tutorial.html#events
Some people do not find callbacks intuitive. If you are one of these
people, you might try something like the following
from pylab import *
class MouseMonitor:
event = None
def __call__(self, event):
self.event = event
mouse = MouseMonitor()
connect('button_press_event', mouse)
plot([1,2,3])
Now you can click on the plot, and get the coords like so
print mouse.event.xdata, mouse.event.ydata
See
http://matplotlib.sourceforge.net/matplotlib.backend_bases.html#MouseEvent
for more information on the mouse event attributes
There are a couple of demos for event handling
examples/keypress_demo.py
examples/coords_demo.py
JDH