Network._round_sig(self, v)[source]¶Used internally to round the vertex to a set number of
significant digits. If sig is set to 4, then the following
are some possible results for a coordinate are as follows.
(1) 0.0xxxx, (2) 0.xxxx, (3) x.xxx, (4) xx.xx,
(5) xxx.x, (6) xxxx.0, (7) xxxx0.0
X,Y coordinate of the vertex