py: implement __len__ for StringDict

Author: kellrott

py/dict.go

@@ -114,6 +114,10 @@ func (a StringDict) M__str__() (Object, error) {
 	return a.M__repr__()
 }
 
+func (a StringDict) M__len__() (Object, error) {
+	return Int(len(a)), nil
+}
+
 func (a StringDict) M__repr__() (Object, error) {
 	var out bytes.Buffer
 	out.WriteRune('{')

py/tests/dict.py

@@ -54,4 +54,9 @@
 assert a.__eq__({'a': 'b'}) == True
 assert a.__ne__({'a': 'b'}) == False
 
+doc="__len__"
+a = {"a": "1", "b": "2"}
+assert a.__len__() == 2
+assert len(a) == 2
+
 doc="finished"