diff --git a/py/dict.go b/py/dict.go
index 10c2d33f..f0aa938c 100644
--- a/py/dict.go
+++ b/py/dict.go
@@ -189,6 +189,19 @@ func (d StringDict) M__getitem__(key Object) (Object, error) {
return nil, ExceptionNewf(KeyError, "%v", key)
}
+func (d StringDict) M__delitem__(key Object) (Object, error) {
+ str, ok := key.(String)
+ if !ok {
+ return nil, ExceptionNewf(KeyError, "%v", key)
+ }
+ _, ok = d[string(str)]
+ if !ok {
+ return nil, ExceptionNewf(KeyError, "%v", key)
+ }
+ delete(d, string(str))
+ return None, nil
+}
+
func (d StringDict) M__setitem__(key, value Object) (Object, error) {
str, ok := key.(String)
if !ok {
diff --git a/py/tests/dict.py b/py/tests/dict.py
index d6140e47..8fc9619e 100644
--- a/py/tests/dict.py
+++ b/py/tests/dict.py
@@ -46,6 +46,16 @@
assert v == 5.5
assertRaises(TypeError, a.items, 'a')
+doc="del"
+a = {'hello': 'world', 'hi': 'there'}
+del a["hello"]
+def doDel(d, key):
+ del d[key]
+assertRaises(KeyError, lambda: doDel(a, "bob"))
+assertRaises(KeyError, lambda: doDel(a, 123))
+assert not a.__contains__('hello')
+assert a.__contains__('hi')
+
doc="__contain__"
a = {'hello': 'world'}
assert a.__contains__('hello')
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