human
Complete the below
def color(G):

    ''''Returns a two-coloring of the graph.
    Raises an exception if the graph is not bipartite.
    Parameters
    G : NetworkX graph
    Returns
    color : dictionary
    A dictionary keyed by node with a 1 or 0 as data for each node color.
    Raises
    exc:`NetworkXError` if the graph is not two-colorable.
    Examples
    >>> from networkx.algorithms import bipartite
    >>> G = nx.path_graph(4)
    >>> c = bipartite.color(G)
    >>> print(c)
    {0: 1, 1: 0, 2: 1, 3: 0}
    You can use this to set a node attribute indicating the biparite set:
    >>> nx.set_node_attributes(G, c, \'bipartite\')
    >>> print(G.node[0][\'bipartite\'])
    1
    >>> print(G.node[1][\'bipartite\'])
    0'
    '''
 Give me a the Python code you requested?
assistant
#Here is the Python code you requested.
    if G.is_directed():
        import itertools
        def neighbors(v):
            return itertools.chain.from_iterable([G.predecessors(v), G.successors(v)])
    else:
        neighbors = G.neighbors
    color = {}
    for n in G:
        if ((n in color) or (len(G[n]) == 0)):
            continue
        queue = [n]
        color[n] = 1
        while queue:
            v = queue.pop()
            c = (1 - color[v])
            for w in neighbors(v):
                if (w in color):
                    if (color[w] == color[v]):
                        raise nx.NetworkXError('Graph    is    not    bipartite.')
                else:
                    color[w] = c
                    queue.append(w)
    color.update(dict.fromkeys(nx.isolates(G), 0))
    return color