feat: implement __repr__ method for TopicId class (#1661)

Signed-off-by: Ashhar Ahmad Khan <145142826+AshharAhmadKhan@users.noreply.github.com>

Author: AshharAhmadKhan

CHANGELOG.md

@@ -28,8 +28,8 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Formatted client_test.py using Black.
 
 ### Added
+- Add `__repr__()` method to `TopicId` class for improved debugging with constructor-style representation (#1629)
 - Added guide for resolving CHANGELOG.md conflicts using GitHub's web editor (`#1591`)
-
 - Added Windows setup guide for SDK developers (`docs/sdk_developers/training/setup/setup_windows.md`) with PowerShell installation instructions. (#1570)
 - Added a beginner assignment guard that requires completion of a Good First Issue. (#1484)
 - Added `/unassign` command allowing contributors to remove themselves from assigned issues.(#1472)

src/hiero_sdk_python/consensus/topic_id.py

@@ -75,6 +75,15 @@ def __str__(self) -> str:
         """
         return f"{self.shard}.{self.realm}.{self.num}"
 
+    def __repr__(self) -> str:
+        """
+        Returns a detailed representation of the TopicId suitable for debugging.
+
+        Returns:
+            str: A string in constructor format 'TopicId(shard=X, realm=Y, num=Z)'.
+        """
+        return f"TopicId(shard={self.shard}, realm={self.realm}, num={self.num})"
+
     @classmethod
     def from_string(cls, topic_id_str: str) -> "TopicId":
         """

tests/unit/topic_id_test.py

@@ -123,3 +123,8 @@ def test_validate_checksum_failure(client):
 
     with pytest.raises(ValueError):
         topic_id.validate_checksum(client)
+
+def test_topic_id_repr():
+    """Test that __repr__ returns the expected format."""
+    topic_id = TopicId(0, 0, 42)
+    assert repr(topic_id) == "TopicId(shard=0, realm=0, num=42)"