from igraph import *

g = Graph()
g.add_vertices(3)
g.add_edges([(1,0),(0,2),(1,2)])
plot(g)

Pavithrans-MacBook-Pro:LDPC pavithran$ python simplePlot.py
Traceback (most recent call last):
  File "simplePlot.py", line 6, in <module>
    plot(g)
  File "/Library/Python/2.7/site-packages/igraph/drawing/__init__.py", line 458, in plot
    result = Plot(target, bbox, background="white")
  File "/Library/Python/2.7/site-packages/igraph/drawing/__init__.py", line 129, in __init__
    self._surface_was_created = not isinstance(target, cairo.Surface)
  File "/Library/Python/2.7/site-packages/igraph/drawing/utils.py", line 396, in __getattr__
    raise TypeError("plotting not available")
TypeError: plotting not available