fix: filename error handling (hiero-ledger#1413) (hiero-ledger#1437)

Signed-off-by: Abhijeet Saharan <abhijeetsaharan2236@gmail.com>

Author: Abhijeet2409

CHANGELOG.md

@@ -165,6 +165,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Refactored `examples/account/account_create_transaction_create_with_alias.py` and `examples/account/account_create_transaction_evm_alias.py` to use the native `AccountInfo.__str__` method for printing account details, replacing manual JSON serialization. ([#1263](https://github.com/hiero-ledger/hiero-sdk-python/issues/1263))
 
 ### Fixed
+- Improved filename-related error handling with clearer and more descriptive error messages.(#1413)
 - Good First Issue bot no longer posts `/assign` reminders for repository collaborators. (#1367)
 - GFI workflow casing 
 - Update `bot-workflows.yml` to trigger only on open PRs with failed workflows; ignore closed PRs and branches without open PRs.

examples/tokens/token_mint_transaction_fungible.py

@@ -1,9 +1,6 @@
-# uv run examples/tokens/token_mint_fungible.py
-# python examples/tokens/token_mint_fungible.py
 """
 uv run examples/tokens/token_mint_transaction_fungible.py
 python examples/tokens/token_mint_transaction_fungible.py
-
 Creates a mintable fungible token and then mints additional supply.
 """
 
@@ -39,8 +36,8 @@ def setup_client():
         client.set_operator(operator_id, operator_key)
         print(f"Client set up with operator id {client.operator_account_id}")
         return client, operator_id, operator_key
-    except (TypeError, ValueError):
-        print("❌ Error: Please check OPERATOR_ID and OPERATOR_KEY in your .env file.")
+    except Exception as e:
+        print(f"❌ Error: Please check OPERATOR_ID and OPERATOR_KEY in your .env file.\n{e}")
         sys.exit(1)
 
 
@@ -89,7 +86,7 @@ def create_new_token():
             print("❌ Warning: Token does not have a supply key set.")
 
         return client, token_id, supply_key
-    except (ValueError, TypeError) as e:
+    except Exception as e:
         print(f"❌ Error creating token: {e}")
         sys.exit(1)
 
@@ -127,7 +124,7 @@ def token_mint_fungible(client, token_id, supply_key):
         # Confirm total supply after minting
         info_after = TokenInfoQuery().set_token_id(token_id).execute(client)
         print(f"Total supply after minting: {info_after.total_supply}")
-    except (ValueError, TypeError) as e:
+    except Exception as e:
         print(f"❌ Error minting tokens: {e}")
         sys.exit(1)