in spherogram_src, no longer use object, use set comprehensions

3-manifolds / Spherogram

Spherogram is a Python module for dealing with the kind of planar diagrams that arise in 3-dimensional topology, such as link and Heegaard diagrams. It a component of the larger SnapPy project.

https://snappy.math.uic.edu/spherogram.html

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in spherogram_src, no longer use object, use set comprehensions #26

Closed fchapoton closed 2 years ago

fchapoton commented 2 years ago

in python3, classes no longer need to subclass object

other fixes:

use set comprehension and dict comprehension
a few better boolean tests