The format string should have a single variable format (%) in it. It will be applied to the value (not the position) of the tick.
Negative numeric values will use a dash not a unicode minus, use mathtext to get a unicode minus by wrappping the format specifier with $ (e.g. "$%g$").
Use an old-style ('%' operator) format string to format the tick.
The following pages refer to to this document either explicitly or contain code examples using this.
matplotlib.pyplot.rgrids
matplotlib.projections.polar.PolarAxes.set_thetagrids
matplotlib.pyplot.thetagrids
matplotlib.ticker
matplotlib.projections.polar.PolarAxes.set_rgrids
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them