basic grammar

rulebook/__init__.py

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+from .parser import parser

rulebook/parser.py

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+from lark import Lark 
+
+grammar = """
+
+start: attr+
+
+attr: key ":" value
+value: roll -> roll
+     | lookup -> lookup
+
+key: CNAME [("." CNAME)+]
+?roll: INT "d" INT
+lookup: CNAME "[" key "]"
+
+
+%import common.CNAME
+%import common.INT
+%import common.WS
+%ignore WS
+
+"""
+
+parser = Lark(grammar, parser='lalr')

setup.py

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+from setuptools import setup 
+
+setup(
+        author="Micaiah Parker",
+        name="rulebook",
+        packages=["rulebook"],
+        requirements=["lark-parser"],
+        version="0.1"
+    )

tests/test_parser.py

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+from rulebook import parser
+
+def test_grammer_roll():
+    assert parser.parse("test: 1d10")
+
+def test_grammer_lookup():
+    assert parser.parse("test: test[test.test.test]")