Added n_steps function

Author: MichaelGoodale

Cargo.lock

@@ -27,6 +27,9 @@ class SyntacticStructure:
     def log_prob(self) -> float:
         """Return the log probability."""
 
+    def n_steps(self) -> int:
+        """Returns the number of steps in the derivation of this structure"""
+
     def contains_lexical_entry(self, s: str) -> bool:
         """Check if this structure contains a specific lexical entry (formatted as an MG entry, will raise an error if unparseable)"""
 

python/python_mg/_lib_name.pyi

@@ -83,6 +83,10 @@ impl PySyntacticStructure {
         self.prob.into_inner().exp()
     }
 
+    fn n_steps(&self) -> usize {
+        self.rules.n_steps()
+    }
+
     fn latex(&self) -> String {
         let lex = self.lex.get();
         self.rules.to_tree(&lex.lexicon).to_latex()