Reduces generated code

modules/openapi-json-schema-generator/src/main/resources/python/_helper_imports_schema_types.hbs

@@ -1,6 +1,5 @@
 import datetime  # noqa: F401
 import decimal  # noqa: F401
-import functools  # noqa: F401
 import io  # noqa: F401
 import re  # noqa: F401
 import typing  # noqa: F401

modules/openapi-json-schema-generator/src/main/resources/python/api_client.hbs

@@ -25,7 +25,7 @@ import tornado.gen
 import frozendict
 
 from {{packageName}} import exceptions, rest, schemas, security_schemes
-from {{packageName}}.configurations import schema_configuration, api_configuration
+from {{packageName}}.configurations import api_configuration, schema_configuration as schema_configuration_
 
 
 class RequestField(fields.RequestField):
@@ -77,18 +77,16 @@ class ParameterStyle(enum.Enum):
     DEEP_OBJECT = 'deepObject'
 
 
+@dataclasses.dataclass
 class PrefixSeparatorIterator:
     # A class to store prefixes and separators for rfc6570 expansions
+    prefix: str
+    separator: str
+    first: bool = True
+    item_separator: str = dataclasses.field(init=False)
 
-    def __init__(self, prefix: str, separator: str):
-        self.prefix = prefix
-        self.separator = separator
-        self.first = True
-        if separator in {'.', '|', '%20'}:
-            item_separator = separator
-        else:
-            item_separator = ','
-        self.item_separator = item_separator
+    def __post_init__(self):
+        self.item_separator = self.separator if self.separator in {'.', '|', '%20'} else ','
 
     def __iter__(self):
         return self
@@ -331,20 +329,13 @@ class JSONDetector:
         return False
 
 
+@dataclasses.dataclass
 class Encoding:
-    def __init__(
-        self,
-        content_type: str,
-        headers: typing.Optional[typing.Dict[str, 'HeaderParameter']] = None,
-        style: typing.Optional[ParameterStyle] = None,
-        explode: bool = False,
-        allow_reserved: bool = False,
-    ):
-        self.content_type = content_type
-        self.headers = headers
-        self.style = style
-        self.explode = explode
-        self.allow_reserved = allow_reserved
+    content_type: str
+    headers: typing.Optional[typing.Dict[str, 'HeaderParameter']] = None
+    style: typing.Optional[ParameterStyle] = None
+    explode: bool = False
+    allow_reserved: bool = False
 
 
 @dataclasses.dataclass
@@ -730,19 +721,6 @@ class ApiResponse:
     body: typing.Union[schemas.Unset, schemas.Schema] = schemas.unset
     headers: typing.Union[schemas.Unset, typing.Dict[str, schemas.Schema]] = schemas.unset
 
-    def __init__(
-        self,
-        response: urllib3.HTTPResponse,
-        body: typing.Union[schemas.Unset, schemas.Schema] = schemas.unset,
-        headers: typing.Union[schemas.Unset, typing.Dict[str, schemas.Schema]] = schemas.unset
-    ):
-        """
-        pycharm needs this to prevent 'Unexpected argument' warnings
-        """
-        self.response = response
-        self.body = body
-        self.headers = headers
-
 
 @dataclasses.dataclass
 class ApiResponseWithoutDeserialization(ApiResponse):
@@ -883,7 +861,7 @@ class OpenApiResponse(JSONDetector, TypedDictInputVerifier, typing.Generic[T]):
         }
 
     @classmethod
-    def deserialize(cls, response: urllib3.HTTPResponse, configuration: schema_configuration.SchemaConfiguration) -> T:
+    def deserialize(cls, response: urllib3.HTTPResponse, configuration: schema_configuration_.SchemaConfiguration) -> T:
         content_type = response.headers.get('content-type')
         deserialized_body = schemas.unset
         streamed = response.supports_chunked_reads()
@@ -935,6 +913,7 @@ class OpenApiResponse(JSONDetector, TypedDictInputVerifier, typing.Generic[T]):
         )
 
 
+@dataclasses.dataclass
 class ApiClient:
     """Generic API client for OpenAPI client library builds.
 
@@ -948,37 +927,25 @@ class ApiClient:
     Do not edit the class manually.
 
     :param configuration: api_configuration.ApiConfiguration object for this client
-    :param schema_configuration: schema_configuration.SchemaConfiguration object for this client
-    :param header_name: a header to pass when making calls to the API.
-    :param header_value: a header value to pass when making calls to
-        the API.
-    :param cookie: a cookie to include in the header when making calls
-        to the API
+    :param schema_configuration: schema_configuration_.SchemaConfiguration object for this client
+    :param default_headers: any default headers to include when making calls to the API.
     :param pool_threads: The number of threads to use for async requests
         to the API. More threads means more concurrent API requests.
     """
-
-    _pool = None
-
-    def __init__(
-        self,
-        configuration: typing.Optional[api_configuration.ApiConfiguration] = None,
-        schema_config: typing.Optional[schema_configuration.SchemaConfiguration] = None,
-        header_name: typing.Optional[str] = None,
-        header_value: typing.Optional[str] = None,
-        cookie: typing.Optional[str] = None,
-        pool_threads: int = 1
-    ):
-        self.configuration: api_configuration.ApiConfiguration = configuration or api_configuration.ApiConfiguration()
-        self.schema_configuration: schema_configuration.SchemaConfiguration = schema_config or schema_configuration.SchemaConfiguration()
-        self.pool_threads = pool_threads
-        self.rest_client = rest.RESTClientObject(self.configuration)
-        self.default_headers = _collections.HTTPHeaderDict()
-        if header_name is not None:
-            self.default_headers[header_name] = header_value
-        self.cookie = cookie
-        # Set default User-Agent.
+    configuration: api_configuration.ApiConfiguration = dataclasses.field(
+        default_factory=lambda: api_configuration.ApiConfiguration())
+    schema_configuration: schema_configuration_.SchemaConfiguration = dataclasses.field(
+        default_factory=lambda: schema_configuration_.SchemaConfiguration())
+    default_headers: _collections.HTTPHeaderDict = dataclasses.field(
+        default_factory=lambda: _collections.HTTPHeaderDict())
+    pool_threads: int = 1
+    user_agent: str = dataclasses.field(init=False)
+    rest_client: rest.RESTClientObject = dataclasses.field(init=False)
+
+    def __post_init__(self):
+        self._pool = None
         self.user_agent = '{{#if httpUserAgent}}{{{httpUserAgent}}}{{/if}}{{#unless httpUserAgent}}OpenAPI-JSON-Schema-Generator/{{{packageVersion}}}/python{{/unless}}'
+        self.rest_client = rest.RESTClientObject(self.configuration)
 
     def __enter__(self):
         return self
@@ -1016,26 +983,46 @@ class ApiClient:
     def set_default_header(self, header_name, header_value):
         self.default_headers[header_name] = header_value
 
-    {{#if tornado}}
-    @tornado.gen.coroutine
-    {{/if}}
-    {{#if asyncio}}async {{/if}}def __call_api(
+    def call_api(
         self,
         resource_path: str,
         method: str,
         host: str,
         headers: typing.Optional[_collections.HTTPHeaderDict] = None,
-        body: typing.Optional[typing.Union[str, bytes]] = None,
+        body: typing.Union[str, bytes, None] = None,
         fields: typing.Optional[typing.Tuple[typing.Tuple[str, str], ...]] = None,
         security_requirement_object: typing.Optional[security_schemes.SecurityRequirementObject] = None,
         stream: bool = False,
-        timeout: typing.Optional[typing.Union[int, typing.Tuple]] = None,
+        timeout: typing.Union[int, typing.Tuple, None] = None,
     ) -> urllib3.HTTPResponse:
+        """Makes the HTTP request (synchronous) and returns deserialized data.
 
+        :param resource_path: Path to method endpoint.
+        :param method: Method to call.
+        :param headers: Header parameters to be
+            placed in the request header.
+        :param body: Request body.
+        :param fields: Request post form parameters,
+            for `application/x-www-form-urlencoded`, `multipart/form-data`
+        :param security_requirement_object: The security requirement object, used to apply auth when making the call
+        :param async_req: execute request asynchronously
+        :param stream: if True, the urllib3.HTTPResponse object will
+                                 be returned without reading/decoding response
+                                 data. Also when True, if the openapi spec describes a file download,
+                                 the data will be written to a local filesystem file and the schemas.BinarySchema
+                                 instance will also inherit from FileSchema and schemas.FileIO
+                                 Default is False.
+        :type stream: bool, optional
+        :param timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :param host: api endpoint host
+        :return:
+            the method will return the response directly.
+        """
         # header parameters
         used_headers = _collections.HTTPHeaderDict(self.default_headers)
-        if self.cookie:
-            headers['Cookie'] = self.cookie
 
         # auth setting
         self.update_params_for_auth(
@@ -1046,7 +1033,7 @@ class ApiClient:
             body
         )
 
-        # must happen after cookie setting and auth setting in case user is overriding those
+        # must happen after auth setting in case user is overriding those
         if headers:
             used_headers.update(headers)
 
@@ -1065,91 +1052,15 @@ class ApiClient:
         )
         return response
 
-    def call_api(
-        self,
-        resource_path: str,
-        method: str,
-        host: str,
-        headers: typing.Optional[_collections.HTTPHeaderDict] = None,
-        body: typing.Optional[typing.Union[str, bytes]] = None,
-        fields: typing.Optional[typing.Tuple[typing.Tuple[str, str], ...]] = None,
-        security_requirement_object: typing.Optional[security_schemes.SecurityRequirementObject] = None,
-        async_req: typing.Optional[bool] = None,
-        stream: bool = False,
-        timeout: typing.Optional[typing.Union[int, typing.Tuple]] = None,
-    ) -> urllib3.HTTPResponse:
-        """Makes the HTTP request (synchronous) and returns deserialized data.
-
-        To make an async_req request, set the async_req parameter.
-
-        :param resource_path: Path to method endpoint.
-        :param method: Method to call.
-        :param headers: Header parameters to be
-            placed in the request header.
-        :param body: Request body.
-        :param fields: Request post form parameters,
-            for `application/x-www-form-urlencoded`, `multipart/form-data`
-        :param security_requirement_object: The security requirement object, used to apply auth when making the call
-        :param async_req: execute request asynchronously
-        :type async_req: bool, optional TODO remove, unused
-        :param stream: if True, the urllib3.HTTPResponse object will
-                                 be returned without reading/decoding response
-                                 data. Also when True, if the openapi spec describes a file download,
-                                 the data will be written to a local filesystem file and the schemas.BinarySchema
-                                 instance will also inherit from FileSchema and schemas.FileIO
-                                 Default is False.
-        :type stream: bool, optional
-        :param timeout: timeout setting for this request. If one
-                                 number provided, it will be total request
-                                 timeout. It can also be a pair (tuple) of
-                                 (connection, read) timeouts.
-        :param host: api endpoint host
-        :return:
-            If async_req parameter is True,
-            the request will be called asynchronously.
-            The method will return the request thread.
-            If parameter async_req is False or missing,
-            then the method will return the response directly.
-        """
-
-        if not async_req:
-            return self.__call_api(
-                resource_path,
-                method,
-                host,
-                headers,
-                body,
-                fields,
-                security_requirement_object,
-                stream,
-                timeout,
-            )
-
-        return self.pool.apply_async(
-            self.__call_api,
-            (
-                resource_path,
-                method,
-                host,
-                headers,
-                body,
-                json,
-                fields,
-                security_requirement_object,
-                stream,
-                timeout,
-            )
-        )
-
     def request(
         self,
         method: str,
         url: str,
         headers: typing.Optional[_collections.HTTPHeaderDict] = None,
         fields: typing.Optional[typing.Tuple[typing.Tuple[str, str], ...]] = None,
-        body: typing.Optional[typing.Union[str, bytes]] = None,
+        body: typing.Union[str, bytes, None] = None,
         stream: bool = False,
-        timeout: typing.Optional[typing.Union[int, typing.Tuple]] = None,
+        timeout: typing.Union[int, typing.Tuple, None] = None,
     ) -> urllib3.HTTPResponse:
         """Makes the HTTP request using RESTClient."""
         if method == "get":
@@ -1208,7 +1119,7 @@ class ApiClient:
         security_requirement_object: typing.Optional[security_schemes.SecurityRequirementObject],
         resource_path: str,
         method: str,
-        body: typing.Optional[typing.Union[str, bytes]] = None
+        body: typing.Union[str, bytes, None] = None
     ):
         """Updates header and query params based on authentication setting.
 
@@ -1232,16 +1143,14 @@ class ApiClient:
                 scope_names
             )
 
-
+@dataclasses.dataclass
 class Api(TypedDictInputVerifier):
     """NOTE: This class is auto generated by OpenAPI JSON Schema Generator
     Ref: https://github.com/openapi-json-schema-tools/openapi-json-schema-generator
 
     Do not edit the class manually.
     """
-
-    def __init__(self, api_client: typing.Optional[ApiClient] = None):
-        self.api_client: ApiClient = api_client or ApiClient()
+    api_client: ApiClient = dataclasses.field(default_factory=lambda: ApiClient())
 
 
 class SerializedRequestBody(typing_extensions.TypedDict, total=False):

modules/openapi-json-schema-generator/src/main/resources/python/components/headers/header.hbs

@@ -10,9 +10,11 @@
 {{> _helper_imports }}
 {{jsonPathPiece.camelCase}} = {{refInfo.refModule}}.{{refInfo.refClass}}
 {{else}}
+    {{#if content}}
 import typing
 import typing_extensions
 
+    {{/if}}
 from {{packageName}} import api_client
     {{#if schema}}
         {{#with schema}}

modules/openapi-json-schema-generator/src/main/resources/python/components/parameters/parameter.hbs

@@ -10,9 +10,11 @@
 {{> _helper_imports }}
 {{jsonPathPiece.camelCase}} = {{refInfo.refModule}}.{{refInfo.refClass}}
 {{else}}
+    {{#if content}}
 import typing
 import typing_extensions
 
+    {{/if}}
 from {{packageName}} import api_client
 
     {{#if schema}}

modules/openapi-json-schema-generator/src/main/resources/python/components/responses/response.hbs

@@ -11,14 +11,22 @@
 {{jsonPathPiece.camelCase}} = {{refInfo.refModule}}.{{refInfo.refClass}}
 {{else}}
 import dataclasses
+    {{#or content headers}}
+        {{#if headers}}
 import datetime
 import decimal
 import io
+        {{/if}}
 import typing
+        {{#if headers}}
 import uuid
+        {{/if}}
 
+        {{#if headers}}
 import frozendict
+        {{/if}}
 import typing_extensions
+    {{/or}}
 import urllib3
 
 from {{packageName}} import api_client