Fix serialization inference for complex types in python (#1549)

Author: sydney-runkle

src/serializers/infer.rs

@@ -285,8 +285,7 @@ pub(crate) fn infer_to_python_known(
             }
             ObType::Complex => {
                 let v = value.downcast::<PyComplex>()?;
-                let complex_str = type_serializers::complex::complex_to_str(v);
-                complex_str.into_py(py)
+                v.into_py(py)
             }
             ObType::Unknown => {
                 if let Some(fallback) = extra.fallback {

tests/serializers/test_complex.py

@@ -37,3 +37,9 @@ def test_complex_json(value, expected):
         assert math.isnan(c.real)
     else:
         assert c.imag == value.imag
+
+
+def test_complex_inference() -> None:
+    s = SchemaSerializer(core_schema.any_schema())
+    assert s.to_python(1 + 2j) == 1 + 2j
+    assert s.to_json(1 + 2j) == b'"1+2j"'