From 31cf0047e74970e4f1eb998f158d4b01cedd8068 Mon Sep 17 00:00:00 2001
From: jan <jan@orange.mpxd.net>
Date: Fri, 7 Apr 2023 18:13:21 -0700
Subject: [PATCH] add mktree

---
 masque/library.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/masque/library.py b/masque/library.py
index 07c0326..45c6dd3 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -887,6 +887,17 @@ class Library(ILibrary):
     def __repr__(self) -> str:
         return f'<Library ({type(self.mapping)}) with keys\n' + pformat(list(self.keys())) + '>'
 
+    @classmethod
+    def mktree(cls, name: str) -> tuple['Tree', 'Pattern']:
+        """
+        Create a new Library and immediately add a pattern
+        """
+        from .pattern import Pattern
+        tree = cls()
+        pat = Pattern()
+        tree[name] = pat
+        return tree, pat
+
 
 class LazyLibrary(ILibrary):
     """