refactor: update example client setup to use Client.from_env() (#2093)

Signed-off-by: ParasSalonia <parassalonia22@gmail.com>
Signed-off-by: Paras Salonia <parassalonia22@gmail.com>

Author: ParasSalonia

examples/account/account_allowance_approve_transaction_hbar.py

@@ -36,7 +36,7 @@
 
 from dotenv import load_dotenv
 
-from hiero_sdk_python import AccountId, Client, Hbar, Network, PrivateKey, TransactionId
+from hiero_sdk_python import AccountId, Client, Hbar, PrivateKey, TransactionId
 from hiero_sdk_python.account.account_allowance_approve_transaction import (
     AccountAllowanceApproveTransaction,
 )
@@ -50,16 +50,10 @@
 
 
 def setup_client() -> Client:
-    """Initialize and set up the client with operator account using env vars."""
-    network = Network(network_name)
-    print(f"Connecting to Hedera {network_name} network!")
-    client = Client(network)
-
-    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)
+    """Setup Client."""
+    client = Client.from_env()
+    print(f"Network: {client.network.network}")
     print(f"Client set up with operator id {client.operator_account_id}")
-
     return client
 
 

examples/account/account_allowance_approve_transaction_nft.py

@@ -39,7 +39,6 @@
     AccountId,
     Client,
     Hbar,
-    Network,
     NftId,
     PrivateKey,
     ResponseCode,
@@ -58,25 +57,16 @@
 network_name = os.getenv("NETWORK", "testnet").lower()
 
 
-def setup_client():
-    """Initialize and set up the client with operator account."""
-    if os.getenv("OPERATOR_ID") is None or os.getenv("OPERATOR_KEY") is None:
-        print("Environment variables OPERATOR_ID and OPERATOR_KEY must be set")
-        sys.exit(1)
-
-    network = Network(network_name)
-    print(f"Connecting to Hedera {network_name} network!")
-    client = Client(network)
+def setup_client() -> tuple[Client, AccountId, PrivateKey]:
+    """Setup Client."""
+    client = Client.from_env()
 
-    operator_id_str = os.getenv("OPERATOR_ID")
-    operator_key_str = os.getenv("OPERATOR_KEY")
-    assert operator_id_str is not None and operator_key_str is not None
+    operator_id = client.operator_account_id
+    operator_key = client.operator_private_key
 
-    operator_id = AccountId.from_string(operator_id_str)
-    operator_key = PrivateKey.from_string(operator_key_str)
-
-    client.set_operator(operator_id, operator_key)
+    print(f"Network: {client.network.network}")
     print(f"Client setup for NFT Owner (Operator): {client.operator_account_id}")
+
     return client, operator_id, operator_key
 
 

examples/account/account_allowance_delete_transaction_hbar.py

@@ -5,7 +5,7 @@
 
 from dotenv import load_dotenv
 
-from hiero_sdk_python import AccountId, Client, Hbar, Network, PrivateKey, TransactionId
+from hiero_sdk_python import AccountId, Client, Hbar, PrivateKey, TransactionId
 from hiero_sdk_python.account.account_allowance_approve_transaction import (
     AccountAllowanceApproveTransaction,
 )
@@ -19,16 +19,10 @@
 
 
 def setup_client() -> Client:
-    """Initialize and set up the client with operator account using env vars."""
-    network = Network(network_name)
-    print(f"Connecting to Hedera {network_name} network!")
-    client = Client(network)
-
-    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)
+    """Setup Client."""
+    client = Client.from_env()
+    print(f"Network: {client.network.network}")
     print(f"Client set up with operator id {client.operator_account_id}")
-
     return client
 
 

examples/account/account_allowance_delete_transaction_nft.py

@@ -24,7 +24,6 @@
     AccountId,
     Client,
     Hbar,
-    Network,
     NftId,
     PrivateKey,
     ResponseCode,
@@ -43,25 +42,14 @@
 network_name = os.getenv("NETWORK", "testnet").lower()
 
 
-def setup_client():
-    """Initialize and set up the client with operator account."""
-    if os.getenv("OPERATOR_ID") is None or os.getenv("OPERATOR_KEY") is None:
-        print("Environment variables OPERATOR_ID and OPERATOR_KEY must be set")
-        sys.exit(1)
-
-    network = Network(network_name)
-    print(f"Connecting to Hedera {network_name} network!")
-    client = Client(network)
-
-    operator_id_str = os.getenv("OPERATOR_ID")
-    operator_key_str = os.getenv("OPERATOR_KEY")
-
-    assert operator_id_str is not None and operator_key_str is not None
+def setup_client() -> tuple[Client, AccountId, PrivateKey]:
+    """Setup Client."""
+    client = Client.from_env()
 
-    operator_id = AccountId.from_string(operator_id_str)
-    operator_key = PrivateKey.from_string(operator_key_str)
+    operator_id = client.operator_account_id
+    operator_key = client.operator_private_key
 
-    client.set_operator(operator_id, operator_key)
+    print(f"Network: {client.network.network}")
     print(f"Client setup for NFT Owner (Operator): {client.operator_account_id}")
 
     return client, operator_id, operator_key

examples/account/account_create_transaction_create_with_alias.py

@@ -31,14 +31,9 @@
 
 def setup_client() -> Client:
     """Initialize client from environment variables."""
-    try:
-        client = Client.from_env()
-        print(f"Client set up with operator id {client.operator_account_id}")
-        return client
-
-    except Exception:
-        print("Error: Please check OPERATOR_ID, OPERATOR_KEY, and NETWORK in your .env file.")
-        sys.exit(1)
+    client = Client.from_env()
+    print(f"Client set up with operator id {client.operator_account_id}")
+    return client
 
 
 def generate_main_and_alias_keys() -> tuple[PrivateKey, PrivateKey]:

examples/account/account_create_transaction_evm_alias.py

@@ -35,14 +35,9 @@
 
 def setup_client() -> Client:
     """Initialize client from environment variables."""
-    try:
-        client = Client.from_env()
-        print(f"Client set up with operator id {client.operator_account_id}")
-        return client
-
-    except Exception:
-        print("Error: Please check OPERATOR_ID, OPERATOR_KEY, and NETWORK in your .env file.")
-        sys.exit(1)
+    client = Client.from_env()
+    print(f"Client set up with operator id {client.operator_account_id}")
+    return client
 
 
 def generate_alias_key() -> tuple[PrivateKey, PublicKey, EvmAddress]:

examples/account/account_create_transaction_with_fallback_alias.py

@@ -31,13 +31,9 @@
 
 def setup_client() -> Client:
     """Initialize client from environment variables."""
-    try:
-        client = Client.from_env()
-        print(f"Client set up with operator id {client.operator_account_id}")
-        return client
-    except Exception:
-        print("Error: Please check OPERATOR_ID, OPERATOR_KEY, and NETWORK in your .env file.")
-        sys.exit(1)
+    client = Client.from_env()
+    print(f"Client set up with operator id {client.operator_account_id}")
+    return client
 
 
 def generate_fallback_key() -> PrivateKey:

examples/account/account_records_query.py

@@ -14,10 +14,8 @@
 
 from hiero_sdk_python import (
     AccountCreateTransaction,
-    AccountId,
     Client,
     Hbar,
-    Network,
     PrivateKey,
     ResponseCode,
 )
@@ -30,17 +28,11 @@
 network_name = os.getenv("NETWORK", "testnet").lower()
 
 
-def setup_client():
-    """Initialize and set up the client with operator account."""
-    network = Network(network_name)
-    print(f"Connecting to Hedera {network_name} network!")
-    client = Client(network)
-
-    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)
+def setup_client() -> Client:
+    """Setup Client."""
+    client = Client.from_env()
+    print(f"Network: {client.network.network}")
     print(f"Client set up with operator id {client.operator_account_id}")
-
     return client
 
 

examples/client/client.py

@@ -35,12 +35,10 @@ def setup_network():
     return network
 
 
-def setup_client(network):
-    """Create and initialize the client with the network."""
-    print("\nStep 2: Create the client with the network")
-    client = Client(network)
-
-    print(f"  - Client initialized with network: {client.network.network}")
+def setup_client() -> Client:
+    """Setup Client."""
+    client = Client.from_env()
+    print(f"Network: {client.network.network}")
     return client
 
 
@@ -88,8 +86,8 @@ def display_available_nodes(client):
 def demonstrate_manual_setup():
     """Run the detailed, step-by-step setup."""
     print("\n--- [ Method 1: Manual Setup] ---")
-    network = setup_network()
-    client = setup_client(network)
+    setup_network()
+    client = setup_client()
     setup_operator(client)
     display_client_configuration(client)
     display_available_nodes(client)

examples/consensus/topic_message_submit_chunked_transaction.py

@@ -6,16 +6,12 @@
 python examples/consensus/topic_message_submit_chunked.py
 """
 
-import os
 import sys
 
 from dotenv import load_dotenv
 
 from hiero_sdk_python import (
-    AccountId,
     Client,
-    Network,
-    PrivateKey,
     ResponseCode,
     TopicCreateTransaction,
     TopicInfoQuery,
@@ -54,21 +50,12 @@
 load_dotenv()
 
 
-def setup_client():
-    """Set up and configure a Hedera client for testnet operations."""
-    network_name = os.getenv("NETWORK", "testnet").lower()
-
-    print(f"Connecting to Hedera {network_name} network!")
-
+def setup_client() -> Client:
+    """Setup Client."""
     try:
-        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"))
-
-        client.set_operator(operator_id, operator_key)
-        print(f"Client initialized with operator: {operator_id}")
+        client = Client.from_env()
+        print(f"Network: {client.network.network}")
+        print(f"Client initialized with operator: {client.operator_account_id}")
         return client
     except Exception as e:
         print(f"Failed to set up client: {e}")