2e reviewed manuscript

18-with-match/lispy/py3.10/examples_test.py

@@ -27,11 +27,13 @@ Doctest for `Environment`
 >>> inner_env = {'a': 2}
 >>> outer_env = {'a': 0, 'b': 1}
 >>> env = Environment(inner_env, outer_env)
->>> env['a'] = 111  # <1>
+>>> env['a']  # <1>
+2
+>>> env['a'] = 111  # <2>
 >>> env['c'] = 222
 >>> env
 Environment({'a': 111, 'c': 222}, {'a': 0, 'b': 1})
->>> env.change('b', 333)  # <2>
+>>> env.change('b', 333)  # <3>
 >>> env
 Environment({'a': 111, 'c': 222}, {'a': 0, 'b': 333})
 

18-with-match/lispy/py3.10/lis.py

@@ -65,7 +65,7 @@ def parse_atom(token: str) -> Atom:
 class Environment(ChainMap[Symbol, Any]):
     "A ChainMap that allows changing an item in-place."
 
-    def change(self, key: Symbol, value: object) -> None:
+    def change(self, key: Symbol, value: Any) -> None:
         "Find where key is defined and change the value there."
         for map in self.maps:
             if key in map:

18-with-match/lispy/py3.9/lis.py

@@ -62,7 +62,7 @@ def parse_atom(token: str) -> Atom:
 class Environment(ChainMap[Symbol, Any]):
     "A ChainMap that allows changing an item in-place."
 
-    def change(self, key: Symbol, value: object) -> None:
+    def change(self, key: Symbol, value: Any) -> None:
         "Find where key is defined and change the value there."
         for map in self.maps:
             if key in map: