chore: review

docs/guides/client_server.md

@@ -27,35 +27,51 @@ The `FHEModelDev`, `FHEModelClient`, and `FHEModelServer` classes in the `concre
 
 ### Example Usage
 
-<!--pytest-codeblocks:skip-->
-
 ```python
-# Development machine
-dev = FHEModelDev(path_dir='path/to/save', model=my_trained_model)
+from concrete.ml.sklearn import DecisionTreeClassifier
+from concrete.ml.deployment import FHEModelDev, FHEModelClient, FHEModelServer
+import numpy as np
+
+# Define the directory for FHE client/server files
+fhe_directory = '/tmp/fhe_client_server_files/'
+
+# Initialize the Decision Tree model
+model = DecisionTreeClassifier()
+
+# Generate some random data for training
+X = np.random.rand(100, 20)
+y = np.random.randint(0, 2, size=100)
+
+# Train and compile the model
+model.fit(X, y)
+model.compile(X)
+
+# Setup the development environment
+dev = FHEModelDev(path_dir=fhe_directory, model=model)
 dev.save()
 
-# Client machine
-client = FHEModelClient(path_dir='path/to/client/zip', key_dir='path/to/keys')
-client.generate_private_and_evaluation_keys()
-serialized_evaluation_keys = client.get_serialized_evaluation_keys()
-# The client encrypts the data to be sent to the server for processing.
-encrypted_data = client.quantize_encrypt_serialize(my_data)
+# Setup the client
+client = FHEModelClient(path_dir=fhe_directory, key_dir="/tmp/keys_client")
+serialized_evaluation_keys = client.generate_private_and_evaluation_keys()
+
+# Client pre-processes new data
+X_new = np.random.rand(1, 20)
+encrypted_data = client.quantize_encrypt_serialize(X_new)
 
-# Server machine
-server = FHEModelServer(path_dir='path/to/server/zip')
+# Setup the server
+server = FHEModelServer(path_dir=fhe_directory)
 server.load()
 
-# Run the FHE execution on the encrypted data.
+# Server processes the encrypted data
 encrypted_result = server.run(encrypted_data, serialized_evaluation_keys)
 
-# Back to Client machine
-# The client decrypts the result.
+# Client decrypts the result
 result = client.deserialize_decrypt_dequantize(encrypted_result)
 ```
 
 > **Data Transfer Overview:**
 >
-> - **From Client to Server:** `serialized_evaluation_keys`, `encrypted_data`.
+> - **From Client to Server:** `serialized_evaluation_keys` (once), `encrypted_data`.
 > - **From Server to Client:** `encrypted_result`.
 
 These objects are serialized into bytes to streamline the data transfer between the client and server.