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. Finally, it can also be a list of (r,g,b) or (r,g,b,a) tuples, in which case these will be used directly to color the edges. If the latter mode is used, you should not provide a value for alpha, as it would be applied globally to all lines.
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.