docs: add method chaining examples (hiero-ledger#1200)

Signed-off-by: Your Name <[email protected]>

Author: suyash1567

CHANGELOG.md

@@ -9,6 +9,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 
 ### Added
+- Added method chaining examples to the developer training guide (`docs/sdk_developers/training/coding_token_transactions.md`) (#1194)
 - examples/mypy.ini for stricter type checking in example scripts
 - Added a GitHub Actions workflow that reminds contributors to link pull requests to issues.
 - Added `__str__` and `__repr__` methods to `AccountInfo` class for improved logging and debugging experience (#1098)

docs/sdk_developers/training/coding_token_transactions.md

@@ -65,6 +65,24 @@ def set_account_id(self, account_id: AccountId) -> "TokenAssociateTransaction":
 
 ```
 
+This feature enables chaining.
+
+For example:
+
+### Standard Usage
+
+```python
+tx.set_account_id(account_id)
+tx.set_token_id(token_id)
+tx.freeze()
+tx.execute(client)
+```
+or
+### Method Chaining
+```python
+tx.set_account_id(account_id).set_token_id(token_id).freeze().execute(client)
+```
+
 ## 4. Protobuf Conversion
 
 The Hedera network communicates via Protocol Buffers (Protobuf). Your transaction class is responsible for converting its Python fields into a Protobuf message.