Cleanup and prepare deprecation messages

src/lexicon/__init__.py

@@ -1,4 +1,26 @@
-"""
-lexicon - a DNS provider agnostic api to manipulate records.
-"""
-__author__ = "Jason Kulatunga"
+import sys
+import warnings
+from types import ModuleType
+
+from lexicon._private import cli as _cli
+from lexicon._private import discovery as _discovery
+from lexicon._private import parser as _parser
+
+
+class DeprecatedModule(ModuleType):
+    def __init__(self, module: ModuleType, name: str):
+        super().__init__(name)
+        self._module = module
+
+    def __getattr__(self, item):
+        warnings.warn(
+            f"Module {self.__name__} is deprecated and will be removed in Lexicon 4>=",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return getattr(self._module, item)
+
+
+sys.modules["lexicon.cli"] = DeprecatedModule(_cli, "lexicon.cli")
+sys.modules["lexicon.parser"] = DeprecatedModule(_parser, "lexicon.parser")
+sys.modules["lexicon.discovery"] = DeprecatedModule(_discovery, "lexicon.discovery")

src/lexicon/_private/cli.py

@@ -6,7 +6,6 @@
 import sys
 import warnings
 from typing import Dict, List, Optional, Union
-import warnings
 
 from lexicon._private.parser import generate_cli_main_parser
 from lexicon.client import Client

src/lexicon/_private/providers/__init__.py

@@ -1,2 +0,0 @@
-"""General configuration of lexicon._private.providers package"""
-__author__ = "Jason Kulatunga"

tests/conftest.py

@@ -114,7 +114,9 @@ def _request(self, action="GET", url="/", data=None, query_params=None):
     original_import = importlib.import_module
 
     with mock.patch("lexicon._private.discovery.pkgutil.iter_modules") as mock_iter:
-        with mock.patch("lexicon._private.discovery.importlib.import_module") as mock_import:
+        with mock.patch(
+            "lexicon._private.discovery.importlib.import_module"
+        ) as mock_import:
 
             def return_iter(path):
                 """