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fix(qs): preserve empty string query parameter values #1554

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fix(qs): preserve empty string query parameter values #1554

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48ff131
fix(qs): preserve empty string query values
pragnyanramtha May 16, 2026
61fa0b1
Merge branch 'main' into pragnyan/fix-querystring-empty-values
pragnyanramtha May 19, 2026
b5d3cb3
Merge branch 'main' into pragnyan/fix-querystring-empty-values
pragnyanramtha May 19, 2026
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4 changes: 2 additions & 2 deletions src/anthropic/_qs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -112,9 +112,9 @@ def _stringify_item(
f"Unknown array_format value: {array_format}, choose from {', '.join(get_args(ArrayFormat))}"
)

serialised = self._primitive_value_to_str(value)
if not serialised:
if value is None:
return []
serialised = self._primitive_value_to_str(value)
return [(key, serialised)]

def _primitive_value_to_str(self, value: PrimitiveData) -> str:
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3 changes: 3 additions & 0 deletions tests/test_qs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ def test_basic() -> None:
assert stringify({"a": False}) == "a=false"
assert stringify({"a": 1.23456}) == "a=1.23456"
assert stringify({"a": None}) == ""
assert stringify({"a": ""}) == "a="


@pytest.mark.parametrize("method", ["class", "function"])
Expand All @@ -40,6 +41,7 @@ def test_nested_brackets() -> None:
assert unquote(stringify({"a": {"b": "c", "d": "e", "f": "g"}})) == "a[b]=c&a[d]=e&a[f]=g"
assert unquote(stringify({"a": {"b": {"c": {"d": "e"}}}})) == "a[b][c][d]=e"
assert unquote(stringify({"a": {"b": True}})) == "a[b]=true"
assert unquote(stringify({"a": {"b": ""}})) == "a[b]="


@pytest.mark.parametrize("method", ["class", "function"])
Expand All @@ -58,6 +60,7 @@ def test_array_repeat() -> None:
assert unquote(stringify({"in": ["foo", "bar"]})) == "in=foo&in=bar"
assert unquote(stringify({"a": {"b": [True, False]}})) == "a[b]=true&a[b]=false"
assert unquote(stringify({"a": {"b": [True, False, None, True]}})) == "a[b]=true&a[b]=false&a[b]=true"
assert unquote(stringify({"a": {"b": ["", None, "c"]}})) == "a[b]=&a[b]=c"
assert unquote(stringify({"in": ["foo", {"b": {"c": ["d", "e"]}}]})) == "in=foo&in[b][c]=d&in[b][c]=e"


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