fix: Allow parameters named "client" and "url"

end_to_end_tests/custom-templates-golden-record/my_test_api_client/api/default/__init__.py

@@ -2,7 +2,7 @@
 
 import types
 
-from . import get_common_parameters, post_common_parameters
+from . import get_common_parameters, post_common_parameters, reserved_parameters
 
 
 class DefaultEndpoints:
@@ -13,3 +13,7 @@ def get_common_parameters(cls) -> types.ModuleType:
     @classmethod
     def post_common_parameters(cls) -> types.ModuleType:
         return post_common_parameters
+
+    @classmethod
+    def reserved_parameters(cls) -> types.ModuleType:
+        return reserved_parameters

end_to_end_tests/golden-record/my_test_api_client/api/default/reserved_parameters.py

@@ -0,0 +1,119 @@
+from http import HTTPStatus
+from typing import Any, Dict, Optional
+
+import httpx
+
+from ... import errors
+from ...client import Client
+from ...types import UNSET, Response
+
+
+def _get_kwargs(
+    *,
+    client: Client,
+    client_query: str,
+    url_query: str,
+) -> Dict[str, Any]:
+    url = "{}/naming/reserved-parameters".format(client.base_url)
+
+    headers: Dict[str, str] = client.get_headers()
+    cookies: Dict[str, Any] = client.get_cookies()
+
+    params: Dict[str, Any] = {}
+    params["client"] = client_query
+
+    params["url"] = url_query
+
+    params = {k: v for k, v in params.items() if v is not UNSET and v is not None}
+
+    return {
+        "method": "get",
+        "url": url,
+        "headers": headers,
+        "cookies": cookies,
+        "timeout": client.get_timeout(),
+        "follow_redirects": client.follow_redirects,
+        "params": params,
+    }
+
+
+def _parse_response(*, client: Client, response: httpx.Response) -> Optional[Any]:
+    if response.status_code == HTTPStatus.OK:
+        return None
+    if client.raise_on_unexpected_status:
+        raise errors.UnexpectedStatus(response.status_code, response.content)
+    else:
+        return None
+
+
+def _build_response(*, client: Client, response: httpx.Response) -> Response[Any]:
+    return Response(
+        status_code=HTTPStatus(response.status_code),
+        content=response.content,
+        headers=response.headers,
+        parsed=_parse_response(client=client, response=response),
+    )
+
+
+def sync_detailed(
+    *,
+    client: Client,
+    client_query: str,
+    url_query: str,
+) -> Response[Any]:
+    """
+    Args:
+        client_query (str):
+        url_query (str):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[Any]
+    """
+
+    kwargs = _get_kwargs(
+        client=client,
+        client_query=client_query,
+        url_query=url_query,
+    )
+
+    response = httpx.request(
+        verify=client.verify_ssl,
+        **kwargs,
+    )
+
+    return _build_response(client=client, response=response)
+
+
+async def asyncio_detailed(
+    *,
+    client: Client,
+    client_query: str,
+    url_query: str,
+) -> Response[Any]:
+    """
+    Args:
+        client_query (str):
+        url_query (str):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[Any]
+    """
+
+    kwargs = _get_kwargs(
+        client=client,
+        client_query=client_query,
+        url_query=url_query,
+    )
+
+    async with httpx.AsyncClient(verify=client.verify_ssl) as _client:
+        response = await _client.request(**kwargs)
+
+    return _build_response(client=client, response=response)

end_to_end_tests/openapi.json

@@ -1150,6 +1150,35 @@
         }
       }
     },
+    "/naming/reserved-parameters": {
+      "description": "Ensure that parameters can't be named things that the code generator needs as variables",
+      "get": {
+        "operationId": "reserved-parameters",
+        "parameters": [
+          {
+            "name": "client",
+            "in": "query",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "url",
+            "in": "query",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": ""
+          }
+        }
+      }
+    },
     "/parameter-references/{path_param}": {
       "get": {
         "tags": [

openapi_python_client/parser/openapi.py

@@ -14,6 +14,7 @@
 from ..utils import PythonIdentifier, get_content_type
 from .errors import GeneratorError, ParseError, PropertyError
 from .properties import (
+    AnyProperty,
     Class,
     EnumProperty,
     ModelProperty,
@@ -346,11 +347,15 @@ def add_parameters(
         endpoint = deepcopy(endpoint)
 
         unique_parameters: Set[Tuple[str, oai.ParameterLocation]] = set()
-        parameters_by_location = {
+        parameters_by_location: Dict[str, Dict[str, Property]] = {
             oai.ParameterLocation.QUERY: endpoint.query_parameters,
             oai.ParameterLocation.PATH: endpoint.path_parameters,
             oai.ParameterLocation.HEADER: endpoint.header_parameters,
             oai.ParameterLocation.COOKIE: endpoint.cookie_parameters,
+            "RESERVED": {  # These can't be param names because codegen needs them as vars, the properties don't matter
+                "client": AnyProperty("client", True, False, None, PythonIdentifier("client", ""), None, None),
+                "url": AnyProperty("url", True, False, None, PythonIdentifier("url", ""), None, None),
+            },
         }
 
         for param in data.parameters:
@@ -412,7 +417,7 @@ def add_parameters(
                     continue
                 existing_prop: Property = parameters_dict[prop.name]
                 # Existing should be converted too for consistency
-                endpoint.used_python_identifiers.remove(existing_prop.python_name)
+                endpoint.used_python_identifiers.discard(existing_prop.python_name)
                 existing_prop.set_python_name(new_name=f"{existing_prop.name}_{location}", config=config)
 
                 if existing_prop.python_name in endpoint.used_python_identifiers: