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Adding __delitem__ to dict #215

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Merged
merged 2 commits into from
Jan 14, 2023
Merged

Adding __delitem__ to dict #215

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348f19b
Adding __delitem__ to dict. Enables the 'del' command to delete items…
kellrott Jan 12, 2023
c89f95c
Adding more exception and testing to dict del command
kellrott Jan 13, 2023
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13 changes: 13 additions & 0 deletions py/dict.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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 {
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10 changes: 10 additions & 0 deletions py/tests/dict.py
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Expand Up @@ -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')

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perhaps add a couple of cases that exercize the 2 ExceptionNewf branches ?

doc="__contain__"
a = {'hello': 'world'}
assert a.__contains__('hello')
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