GraphTemplate (Python)

The GraphTemplate Cython class wraps the C++ graph_template. User graph classes must subclass it and override CompileEvent to call define_particle_nodes and register features.

Special Methods

Signature	Description
`__hash__() → int`	Integer hash from the first 8 hex digits of `self.hash`.
`__eq__(other) → bool`	Equality based on C++ `operator==`.
`is_self(inpt) → bool`	Return `True` if `inpt` is an instance or subclass of `GraphTemplate`.

Properties

Property	Type	Description
`index`	`int`	Event index (read-only, from the underlying `graph_t`).
`Tree`	`str`	ROOT TTree name (read-only).
`PreSelection`	`bool`	Pre-selection flag (read/write). Return `False` in `CompileEvent` to discard the graph.

C++ Interface (called from subclass `CompileEvent`)

Method	Description
`define_particle_nodes(ptr)`	Set the node particle list from a `std::vector<ParticleType>`.
`define_topology(fn)`	Set the edge connectivity function `fn(G, tuple<P,P>)` which returns `True` when two particles share an edge.
`get_event[T]() → T*`	Return the underlying event cast to type `T`.
`add_graph_truth_feature(name, fn)`	Register a truth graph-level feature function.
`add_graph_data_feature(name, fn)`	Register a data graph-level feature function.
`add_node_truth_feature(name, fn)`	Register a truth node-level feature function.
`add_node_data_feature(name, fn)`	Register a data node-level feature function.
`add_edge_truth_feature(name, fn)`	Register a truth edge-level feature function.
`add_edge_data_feature(name, fn)`	Register a data edge-level feature function.