gammagl.utils.is_undirected

class is_undirected(edge_index, edge_attr=None, num_nodes=None)

Returns True if the graph given by edge_index is undirected.

Parameters:

• edge_index (tensor) – The edge indices.

• edge_attr (tensor, list[tensor], optional) – Edge weights or multi- dimensional edge features. If given as a list, will check for equivalence in all its entries. (default: None)

• num_nodes (int, optional) – The number of nodes, i.e. max_val + 1 of edge_index. (default: None)

Return type:

bool