from __future__ import absolute_import
from __future__ import division
from __future__ import print_function


class Graph(object):
    """Graph class."""
    pass


def main():
    pass


if __name__ == '__main__':
    main()

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function


class Vertex(object):
	"""Vertex class.

    It uses a dict to keep track of the vertices which it's connected.
	"""


class Graph(object):
    """Graph class.

    It contains a dict to map vertex name to vertex objects.
    """
    pass


def main():
    pass


if __name__ == '__main__':
    main()

Add Vertex class and doc strings for 2 classes
Add Vertex class and doc strings for 2 classes
