Replace pylint with flake8

.circleci/config.yml

@@ -16,13 +16,13 @@ jobs:
             python3 -m venv venv
             . venv/bin/activate
             pip install -r requirements.txt
-            pip install pylint pytest
+            pip install flake8 pytest
       - run:
-          name: Run pylint
+          name: Run flake8
           command: |
             . venv/bin/activate
             export PYTHONPATH=.
-            pylint devchat
+            flake8 devchat
       - run:
           name: Run pytest
           command: |

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 100

.vscode/settings.json

@@ -1,5 +1,4 @@
 {
-    "python.linting.pylintEnabled": true,
     "python.linting.enabled": true,
     "python.linting.flake8Args": ["--max-line-length=100"]
 }

devchat/chat/__init__.py

@@ -1 +1,3 @@
 from .chat import Chat
+
+__all__ = ['Chat']

tests/test_message.py

@@ -1,52 +1,64 @@
 import pytest
 from devchat.message import Message
 
+
 def test_valid_message_creation():
     message = Message(role="user", content="Hello, World!")
     assert message.role == "user"
     assert message.content == "Hello, World!"
     assert message.name is None
 
+
 def test_valid_message():
     message = Message("user", "Hello, World!", "John_Doe")
     assert message.to_dict() == {"role": "user", "content": "Hello, World!", "name": "John_Doe"}
 
+
 def test_invalid_role():
     with pytest.raises(ValueError):
         Message("invalid_role", "Hello, World!")
 
+
 def test_none_content():
     message = Message(role="user", content=None)
     assert message.content is None
 
+
 def test_empty_content():
     with pytest.raises(ValueError):
         Message("user", "")
 
+
 def test_blank_content():
     with pytest.raises(ValueError):
         Message("user", "  ")
 
+
 def test_invalid_name():
     with pytest.raises(ValueError):
         Message("user", "Hello, World!", "Invalid@Name")
 
+
 def test_empty_name():
     with pytest.raises(ValueError):
         Message("user", "Hello, World!", "")
 
+
 def test_blank_name():
     with pytest.raises(ValueError):
         Message("user", "Hello, World!", "  ")
 
+
 def test_tab_content():
     with pytest.raises(ValueError):
         Message(role="user", content="\t")
 
+
 def test_none_name():
     message = Message("user", "Hello, World!", None)
     assert message.to_dict() == {"role": "user", "content": "Hello, World!"}
 
+
 def test_from_dict():
     message_data = {
         "content": "Welcome to the chat.",
@@ -57,6 +69,7 @@ def test_from_dict():
     assert message.content == "Welcome to the chat."
     assert message.name is None
 
+
 def test_from_dict_with_name():
     message_data = {
         "content": "Hello, Assistant!",
@@ -67,4 +80,3 @@ def test_from_dict_with_name():
     assert message.role == "user"
     assert message.content == "Hello, Assistant!"
     assert message.name == "JohnDoe"
-