chore: some pylance errors

Signed-off-by: exploreriii <[email protected]>

Author: exploreriii

examples/token_airdrop_claim_signature_not_required_auto.py

@@ -56,8 +56,8 @@ def setup_client():
         network = Network(network_name)
         client = Client(network)
 
-        operator_id = AccountId.from_string(os.getenv("OPERATOR_ID"))
-        operator_key = PrivateKey.from_string(os.getenv("OPERATOR_KEY"))
+        operator_id = AccountId.from_string(os.getenv("OPERATOR_ID", ''))
+        operator_key = PrivateKey.from_string(os.getenv("OPERATOR_KEY", ''))
         client.set_operator(operator_id, operator_key)
 
     except Exception as e:

examples/token_airdrop_claim_signature_required.py

@@ -65,8 +65,8 @@ def setup_client():
         network = Network(network_name)
         client = Client(network)
 
-        operator_id = AccountId.from_string(os.getenv("OPERATOR_ID"))
-        operator_key = PrivateKey.from_string(os.getenv("OPERATOR_KEY"))
+        operator_id = AccountId.from_string(os.getenv("OPERATOR_ID", ''))
+        operator_key = PrivateKey.from_string(os.getenv("OPERATOR_KEY", ''))
         client.set_operator(operator_id, operator_key)
 
     except Exception as e: