planarity.planarity_functions — planarity 0.3 documentation

### Navigation

- index
- modules |
- planarity 0.3 documentation »
- Module code »
- planarity »

# Source code for planarity.planarity_functions

    """Functional interface to planarity."""
    import planarity

    __all__ = ['is_planar', 'kuratowski_edges', 'ascii', 'write', 'mapping']

    def is_planar(graph):
        """Test planarity of graph."""
        return planarity.PGraph(graph).is_planar()

    def kuratowski_edges(graph):
        """Return edges of forbidden subgraph of non-planar graph."""
        return planarity.PGraph(graph).kuratowski_edges()

    def ascii(graph):
        """Draw text representation of a planar graph."""
        return planarity.PGraph(graph).ascii()

    def write(graph, path='stdout'):
        """Write an adjacency list representation of graph to path."""
        planarity.PGraph(graph).write(path)

    def mapping(graph):
        """Return dictionary of internal mapping of nodes to integers."""
        return planarity.PGraph(graph).mapping()

### Navigation

- index
- modules |
- planarity 0.3 documentation »
- Module code »
- planarity »