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"""
Category Theory module.
Provides some of the fundamental category-theory-related classes,
including categories, morphisms, diagrams. Functors are not
implemented yet.
The general reference work this module tries to follow is
[JoyOfCats] J. Adamek, H. Herrlich. G. E. Strecker: Abstract and
Concrete Categories. The Joy of Cats.
The latest version of this book should be available for free download
from
katmat.math.uni-bremen.de/acc/acc.pdf
"""
from .baseclasses import (Object, Morphism, IdentityMorphism,
NamedMorphism, CompositeMorphism, Category,
Diagram)
from .diagram_drawing import (DiagramGrid, XypicDiagramDrawer,
xypic_draw_diagram, preview_diagram)
__all__ = [
'Object', 'Morphism', 'IdentityMorphism', 'NamedMorphism',
'CompositeMorphism', 'Category', 'Diagram',
'DiagramGrid', 'XypicDiagramDrawer', 'xypic_draw_diagram',
'preview_diagram',
]