Make aiohttp and requests optional dependencies

Closes maxmind#104 (supersedes it)

Fixes maxmind#101

Author: akx

README.rst

@@ -17,6 +17,8 @@ To install the ``geoip2`` module, type:
 .. code-block:: bash
 
     $ pip install geoip2
+    $ pip install geoip2[aiohttp]  # Install aiohttp as well
+    $ pip install geoip2[requests]   # Install requests as well
 
 If you are not able to use pip, you may also use easy_install from the
 source directory:

geoip2/webservice.py

@@ -25,14 +25,24 @@
 
 """
 
+from __future__ import annotations
+
 import ipaddress
 import json
 from typing import Any, Dict, cast, List, Optional, Type, Union
 
-import aiohttp
-import aiohttp.http
-import requests
-import requests.utils
+try:
+    import aiohttp
+    import aiohttp.http
+except ImportError:
+    aiohttp = None  # type: ignore[assignment]
+
+try:
+    import requests
+    import requests.utils
+except ImportError:
+    requests = None  # type: ignore[assignment]
+
 
 import geoip2
 import geoip2.models
@@ -48,14 +58,6 @@
 from geoip2.models import City, Country, Insights
 from geoip2.types import IPAddress
 
-_AIOHTTP_UA = (
-    f"GeoIP2-Python-Client/{geoip2.__version__} {aiohttp.http.SERVER_SOFTWARE}"
-)
-
-_REQUEST_UA = (
-    f"GeoIP2-Python-Client/{geoip2.__version__} {requests.utils.default_user_agent()}"
-)
-
 
 class BaseClient:  # pylint: disable=missing-class-docstring, too-few-public-methods
     _account_id: str
@@ -326,10 +328,19 @@ async def insights(self, ip_address: IPAddress = "me") -> Insights:
         )
 
     async def _session(self) -> aiohttp.ClientSession:
+        if aiohttp is None:
+            raise ImportError(
+                "aiohttp is required for async mode; install `GeoIP2[aiohttp]`"
+            )
+
         if not hasattr(self, "_existing_session"):
+            user_agent = (
+                f"GeoIP2-Python-Client/{geoip2.__version__} "
+                f"{aiohttp.http.SERVER_SOFTWARE}"
+            )
             self._existing_session = aiohttp.ClientSession(
                 auth=aiohttp.BasicAuth(self._account_id, self._license_key),
-                headers={"Accept": "application/json", "User-Agent": _AIOHTTP_UA},
+                headers={"Accept": "application/json", "User-Agent": user_agent},
                 timeout=aiohttp.ClientTimeout(total=self._timeout),
             )
 
@@ -436,7 +447,10 @@ def __init__(  # pylint: disable=too-many-arguments
         self._session = requests.Session()
         self._session.auth = (self._account_id, self._license_key)
         self._session.headers["Accept"] = "application/json"
-        self._session.headers["User-Agent"] = _REQUEST_UA
+        self._session.headers["User-Agent"] = (
+            f"GeoIP2-Python-Client/{geoip2.__version__}"
+            f" {requests.utils.default_user_agent()}"
+        )
         if proxy is None:
             self._proxies = None
         else:

pyproject.toml

@@ -10,9 +10,7 @@ authors = [
     {name = "Gregory Oschwald", email = "goschwald@maxmind.com"},
 ]
 dependencies = [
-    "aiohttp>=3.6.2,<4.0.0",
     "maxminddb>=2.5.1,<3.0.0",
-    "requests>=2.24.0,<3.0.0",
 ]
 requires-python = ">=3.8"
 readme = "README.rst"
@@ -38,6 +36,12 @@ classifiers = [
 test = [
     "pytest-httpserver>=1.0.10",
 ]
+aiohttp = [
+    "aiohttp>=3.6.2,<4.0.0",
+]
+requests = [
+    "requests>=2.24.0,<3.0.0",
+]
 
 [tool.setuptools.package-data]
 geoip2 = ["py.typed"]

setup.cfg

@@ -9,7 +9,9 @@ geoip2 = py.typed
 disable = duplicate-code
 
 [tox:tox]
-envlist = {py38,py39,py310,py311,py312}-test,py312-{black,lint,flake8,mypy}
+envlist =
+    {py38,py39,py310,py311,py312}-test{-all}
+    py312-{black,lint,flake8,mypy}
 
 [gh-actions]
 python =
@@ -25,6 +27,15 @@ deps =
     pytest
 commands = pytest tests
 
+[testenv:{py38,py39,py310,py311,py312}-test-all]
+deps =
+    pytest-httpserver
+    pytest
+commands = pytest tests
+extras =
+    aiohttp
+    requests
+
 [testenv:py312-black]
 deps = black
 commands = black --check --diff .
@@ -45,3 +56,6 @@ deps =
     types-requests
     voluptuous-stubs
 commands = mypy geoip2 tests
+extras =
+    aiohttp
+    requests

tests/webservice_test.py

@@ -355,6 +355,7 @@ def test_missing_constructor_args(self):
 
 class TestClient(TestBaseClient):
     def setUp(self):
+        pytest.importorskip("requests")
         self.client_class = Client
         self.client = Client(42, "abcdef123456")
         self.client._base_uri = self.httpserver.url_for("/geoip/v2.1")
@@ -365,6 +366,7 @@ def run_client(self, v):
 
 class TestAsyncClient(TestBaseClient):
     def setUp(self):
+        pytest.importorskip("aiohttp")
         self._loop = asyncio.new_event_loop()
         self.client_class = AsyncClient
         self.client = AsyncClient(42, "abcdef123456")