docs: Add docstrings to account/account_info.py (#562) (#625)

Signed-off-by: Pranay <pranaygadh_mc24b06_003@dtu.ac.in>

Author: Pranay22077

CHANGELOG.md

@@ -8,6 +8,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 
 ### Added
+- Add Google-style docstrings to `AccountInfo` class and its methods in `account_info.py`.
 
 ### Changed
 

src/hiero_sdk_python/account/account_info.py

@@ -54,6 +54,20 @@ class AccountInfo:
 
     @classmethod
     def _from_proto(cls, proto: CryptoGetInfoResponse.AccountInfo) -> "AccountInfo":
+        """Creates an AccountInfo instance from its protobuf representation.
+        Deserializes a `CryptoGetInfoResponse.AccountInfo` message into this
+        SDK's `AccountInfo` object. This method handles the conversion of
+        protobuf types to their corresponding SDK types (e.g., tinybars to
+        `Hbar`, proto `Timestamp` to SDK `Timestamp`).
+        Args:
+            proto (CryptoGetInfoResponse.AccountInfo): The source protobuf
+                message containing account information.
+        Returns:
+            AccountInfo: A new `AccountInfo` instance populated with data
+                from the protobuf message.
+        Raises:
+            ValueError: If the input `proto` is None.
+        """
         if proto is None:
             raise ValueError("Account info proto is None")
 
@@ -80,6 +94,19 @@ def _from_proto(cls, proto: CryptoGetInfoResponse.AccountInfo) -> "AccountInfo":
         )
 
     def _to_proto(self) -> CryptoGetInfoResponse.AccountInfo:
+        """Converts this AccountInfo object to its protobuf representation.
+        Serializes this `AccountInfo` instance into a
+        `CryptoGetInfoResponse.AccountInfo` message. This method handles
+        the conversion of SDK types back to their protobuf equivalents
+        (e.g., `Hbar` to tinybars, SDK `Timestamp` to proto `Timestamp`).
+        Note:
+            SDK fields that are `None` will be serialized as their
+            default protobuf values (e.g., 0 for integers, False for booleans,
+            empty strings/bytes).
+        Returns:
+            CryptoGetInfoResponse.AccountInfo: The protobuf message
+                representation of this `AccountInfo` object.
+        """
         return CryptoGetInfoResponse.AccountInfo(
             accountID=self.account_id._to_proto() if self.account_id else None,
             contractAccountID=self.contract_account_id,