Use tomli/tomli-w instead of unmaintained toml

Replace the `toml` dependency that is unmaintained (last release
in 2020) and does not implement TOML 1.0 with more modern `tomli`
and `tomli-w` packages.

Co-authored-by: Maksim Beliaev <beliaev.m.s@gmail.com>

responses/__init__.py

@@ -25,7 +25,8 @@
 from typing import overload
 from warnings import warn
 
-import toml as _toml
+import tomli as _toml
+
 from requests.adapters import HTTPAdapter
 from requests.adapters import MaxRetryError
 from requests.exceptions import ConnectionError
@@ -770,7 +771,7 @@ def add(
     put = partialmethod(add, PUT)
 
     def _add_from_file(self, file_path: "Union[str, bytes, os.PathLike[Any]]") -> None:
-        with open(file_path) as file:
+        with open(file_path, "rb") as file:
             data = _toml.load(file)
 
         for rsp in data["responses"]:

responses/_recorder.py

@@ -2,10 +2,10 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:  # pragma: no cover
-    import io
     import os
 
     from typing import Any
+    from typing import BinaryIO
     from typing import Callable
     from typing import Dict
     from typing import List
@@ -18,15 +18,23 @@
     from responses import _F
     from responses import BaseResponse
 
-import toml as _toml
+import tomli_w as _toml
 
 from responses import RequestsMock
 from responses import Response
 from responses import _real_send
 from responses.registries import OrderedRegistry
 
 
-def _dump(registered: "List[BaseResponse]", destination: "io.IOBase") -> None:
+def _remove_nones(d: "Any") -> "Any":
+    if isinstance(d, dict):
+        return {k: _remove_nones(v) for k, v in d.items() if v is not None}
+    if isinstance(d, list):
+        return [_remove_nones(i) for i in d]
+    return d
+
+
+def _dump(registered: "List[BaseResponse]", destination: "BinaryIO") -> None:
     data: Dict[str, Any] = {"responses": []}
     for rsp in registered:
         try:
@@ -49,7 +57,7 @@ def _dump(registered: "List[BaseResponse]", destination: "io.IOBase") -> None:
                 "Cannot dump response object."
                 "Probably you use custom Response object that is missing required attributes"
             ) from exc
-    _toml.dump(data, destination)
+    _toml.dump(_remove_nones(data), destination)
 
 
 class Recorder(RequestsMock):
@@ -71,7 +79,7 @@ def deco_record(function: "_F") -> "Callable[..., Any]":
             def wrapper(*args: "Any", **kwargs: "Any") -> "Any":  # type: ignore[misc]
                 with self:
                     ret = function(*args, **kwargs)
-                    with open(file_path, "w") as file:
+                    with open(file_path, "wb") as file:
                         _dump(self.get_registry().registered, file)
 
                     return ret

responses/tests/test_recorder.py

@@ -1,7 +1,8 @@
 from pathlib import Path
 
 import requests
-import toml
+import tomli_w
+import tomli as _toml
 
 import responses
 from responses import _recorder
@@ -94,8 +95,8 @@ def run():
 
         run()
 
-        with open(self.out_file) as file:
-            data = toml.load(file)
+        with open(self.out_file, "rb") as file:
+            data = _toml.load(file)
 
         assert data == get_data(httpserver.host, httpserver.port)
 
@@ -109,8 +110,8 @@ def teardown(self):
         assert not out_file.exists()
 
     def test_add_from_file(self):
-        with open("out.toml", "w") as file:
-            toml.dump(get_data("example.com", "8080"), file)
+        with open("out.toml", "wb") as file:
+            tomli_w.dump(get_data("example.com", "8080"), file)
 
         @responses.activate
         def run():

setup.py

@@ -19,8 +19,8 @@
 install_requires = [
     "requests>=2.22.0,<3.0",
     "urllib3>=1.25.10",
-    "toml",
-    "types-toml",
+    "tomli",
+    "tomli-w",
     "typing_extensions; python_version < '3.8'",
 ]