feat: py bindings refactoring (#317)

* feat: py bindings refactoring

* unset version in pyproject.toml

bindings/python/src/value.rs

@@ -1,6 +1,8 @@
-use pyo3::prelude::{PyDictMethods, PyListMethods};
-use pyo3::types::{PyDict, PyList};
-use pyo3::{Bound, IntoPyObject, IntoPyObjectExt, PyAny, PyErr, PyResult, Python};
+use anyhow::Context;
+use pyo3::prelude::{PyAnyMethods, PyBytesMethods, PyDictMethods, PyListMethods, PyStringMethods};
+use pyo3::types::{PyBytes, PyDict, PyList, PyString};
+use pyo3::{Bound, FromPyObject, IntoPyObject, IntoPyObjectExt, PyAny, PyErr, PyResult, Python};
+use pythonize::depythonize;
 use serde_json::Value;
 
 #[repr(transparent)]
@@ -46,3 +48,24 @@ impl<'py> IntoPyObject<'py> for PyValue {
         value_to_object(py, &self.0)
     }
 }
+
+impl<'py> FromPyObject<'py> for PyValue {
+    fn extract_bound(ob: &Bound<'py, PyAny>) -> PyResult<Self> {
+        if let Ok(s) = ob.downcast::<PyString>() {
+            let str_slice = s.to_str()?;
+
+            let var = serde_json::from_str(str_slice).context("Invalid JSON")?;
+            return Ok(PyValue(var));
+        }
+
+        if let Ok(b) = ob.downcast::<PyBytes>() {
+            let bytes = b.as_bytes();
+
+            let var = serde_json::from_slice(bytes).context("Invalid JSON")?;
+            return Ok(PyValue(var));
+        }
+
+        let var = depythonize(ob)?;
+        Ok(PyValue(var))
+    }
+}