fix: copy with tzinfo (#567)

* fix: copy with tzinfo

* fix: apply feedback

Author: JeanArhancet

src/input/datetime.rs

@@ -1,6 +1,6 @@
 use pyo3::intern;
 use pyo3::prelude::*;
-use pyo3::types::{PyDate, PyDateTime, PyDelta, PyDeltaAccess, PyTime, PyTzInfo};
+use pyo3::types::{PyDate, PyDateTime, PyDelta, PyDeltaAccess, PyDict, PyTime, PyTzInfo};
 use speedate::{Date, DateTime, Duration, ParseError, Time};
 use std::borrow::Cow;
 use strum::EnumMessage;
@@ -455,4 +455,8 @@ impl TzInfo {
             format!("{:+03}:{:02}", mins / 60, (mins % 60).abs())
         }
     }
+
+    fn __deepcopy__(&self, py: Python, _memo: &PyDict) -> PyResult<Py<Self>> {
+        Py::new(py, self.clone())
+    }
 }

tests/validators/test_datetime.py

@@ -1,3 +1,4 @@
+import copy
 import json
 import platform
 import re
@@ -185,6 +186,22 @@ def test_tz_comparison():
         SchemaValidator({'type': 'datetime', 'gt': uk_3pm}).validate_python('2022-01-01T16:00:00+01:00')
 
 
+def test_tz_info_deepcopy():
+    output = SchemaValidator({'type': 'datetime'}).validate_python('2023-02-15T16:23:44.037Z')
+    c = copy.deepcopy(output)
+    assert repr(output.tzinfo) == 'TzInfo(UTC)'
+    assert repr(c.tzinfo) == 'TzInfo(UTC)'
+    assert c == output
+
+
+def test_tz_info_copy():
+    output = SchemaValidator({'type': 'datetime'}).validate_python('2023-02-15T16:23:44.037Z')
+    c = copy.copy(output)
+    assert repr(output.tzinfo) == 'TzInfo(UTC)'
+    assert repr(c.tzinfo) == 'TzInfo(UTC)'
+    assert c == output
+
+
 def test_custom_tz():
     class CustomTz(tzinfo):
         def utcoffset(self, _dt):