Added node count and leaf count

[gupta2140]

No description provided.

[gupta2140]

Can someone tell me why last 2 tests have failed?

[harshildarji]

@gupta2140 Check out the Travis CI logs.

[gupta2140]

The main error its showing is this:
E ImportError:

E Importing the multiarray numpy extension module failed. Most

E likely you are trying to import a failed build of numpy.

E If you're working with a numpy git repo, try git clean -xdf (removes all

E files not under version control). Otherwise reinstall numpy.

E

E Original error was: /home/travis/virtualenv/python3.7-dev/lib/python3.7/site-packages/numpy/core/multiarray.cpython-37m-x86_64-linux-gnu.so: undefined symbol: PyTraceMalloc_Untrack

But i'm not getting it. Can you help me with it?

[frmatias]

Travis config was wrong i already fixed, try again, its because travis try download python 3.7, but travis can't find Python 3.7... try again