Usage

import topojson

topology = topojson.read(file) # (1)!
topology.write(file) # (2)!

land = topology.objects["land"]

features = topojson.feature(topology, land) # (3)!
features = topology.feature("land") # (4)!
features.write(file) # (5)!

mesh = topojson.mesh(topology, land, filter=None) # (6)!
mesh = topology.mesh("land", filter=None) # (7)!
mesh.write(file) # (8)!

objects = topology.objects["counties"].geometries
merge = topojson.merge(objects) # (9)!
merge = topology.merge("counties") # (10)!
merge.write(file) # (11)!

objects = list(topology["objects"].values())
neighbors = topojson.neighbors(objects) # (12)!
neighbors = topology.neighbors(list(topology["objects"].keys())) # (13)!

bbox = topojson.bbox(topology) # (14)!
bbox = topology.compute_bbox() # (15)!

quantize = topojson.quantize(topology, 1e4) # (16)!
quantize = topology.quantize(1e4) # (17)!
quantize.write(file) # (18)!

1. See topojson.read
2. See TopoJSON.write
3. See topojson.feature
4. See TopoJSON.feature
5. See GeoJSON_FeatureCollection.write and GeoJSON_Feature.write
6. See topojson.mesh
7. See TopoJSON.mesh
8. See FeatureGeometryType_MultiLineString.write
9. See topojson.merge
10. See TopoJSON.merge
11. See FeatureGeometryType_MultiLineString.write
12. See topojson.neighbors
13. See TopoJSON.neighbors
14. See topojson.bbox
15. See TopoJSON.compute_bbox
16. See topojson.quantize
17. See TopoJSON.quantize
18. See TopoJSON.write