Draw the edges of the graph G
This draws only the edges of the graph G.
pos is a dictionary keyed by vertex with a two-tuple of x-y positions as the value. See networkx.layout for functions that compute node positions.
edgelist is an optional list of the edges in G to be drawn. If provided, only the edges in edgelist will be drawn.
edgecolor can be a list of matplotlib color letters such as ‘k’ or ‘b’ that lists the color of each edge; the list must be ordered in the same way as the edge list. Alternatively, this list can contain numbers and those number are mapped to a color scale using the color map edge_cmap.
For directed graphs, “arrows” (actually just thicker stubs) are drawn at the head end. Arrows can be turned off with keyword arrows=False.
See draw_networkx for the list of other optional parameters.