python: simplify module imports (#17507)

In #16624, I introduced a new mechanism to record imports to other
modules, instead of having specialized datetime/typing/pydantic objects
to manage imports for these modules.

This change reuses the mechanism from #16624 and replace the specialized
import managers by the generic one. Unused imports from various
.mustache templates are also cleaned up.

Author: multani

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPythonCodegen.java

@@ -1,12 +1,9 @@
 # coding: utf-8
 
 {{>partial_header}}
-
-import io
 import warnings
-
 from pydantic import validate_call, Field, StrictFloat, StrictStr, StrictInt
-from typing import Dict, List, Optional, Tuple, Union, Any
+from typing import Any, Dict, List, Optional, Tuple, Union
 
 try:
     from typing import Annotated
@@ -170,7 +167,7 @@ class {{classname}}:
             {{#isBinary}}
             # convert to byte array if the input is a file name (str)
             if isinstance({{paramName}}, str):
-                with io.open({{paramName}}, "rb") as _fp:
+                with open({{paramName}}, "rb") as _fp:
                     _body_params = _fp.read()
             else:
                 _body_params = {{paramName}}

modules/openapi-generator/src/main/resources/python/api.mustache

@@ -2,7 +2,6 @@
 
 {{>partial_header}}
 
-import atexit
 import datetime
 from dateutil.parser import parse
 import json

modules/openapi-generator/src/main/resources/python/api_client.mustache

@@ -1,7 +1,5 @@
 
 ```python
-import time
-import os
 import {{{packageName}}}
 {{#vendorExtensions.x-py-example-import}}
 {{{.}}}

modules/openapi-generator/src/main/resources/python/api_doc_example.mustache

@@ -1,7 +1,7 @@
 """API response object."""
 
 from __future__ import annotations
-from typing import Any, Dict, Optional, Generic, TypeVar
+from typing import Dict, Optional, Generic, TypeVar
 from pydantic import Field, StrictInt, StrictStr, StrictBytes, BaseModel
 
 T = TypeVar("T")

modules/openapi-generator/src/main/resources/python/api_response.mustache

@@ -1,6 +1,5 @@
 ```python
 {{#apiInfo}}{{#apis}}{{#-last}}{{#hasHttpSignatureMethods}}import datetime{{/hasHttpSignatureMethods}}{{/-last}}{{/apis}}{{/apiInfo}}
-import time
 import {{{packageName}}}
 from {{{packageName}}}.rest import ApiException
 from pprint import pprint

modules/openapi-generator/src/main/resources/python/common_README.mustache

@@ -3,22 +3,14 @@ from inspect import getfullargspec
 import json
 import pprint
 import re  # noqa: F401
-{{#vendorExtensions.x-py-datetime-imports}}{{#-first}}from datetime import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-datetime-imports}}
-{{#vendorExtensions.x-py-typing-imports}}{{#-first}}from typing import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-typing-imports}}
-{{#vendorExtensions.x-py-pydantic-imports}}{{#-first}}from pydantic import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-pydantic-imports}}
 {{#vendorExtensions.x-py-other-imports}}
 {{{.}}}
 {{/vendorExtensions.x-py-other-imports}}
 {{#vendorExtensions.x-py-model-imports}}
 {{{.}}}
 {{/vendorExtensions.x-py-model-imports}}
 from typing import Union, Any, List, TYPE_CHECKING, Optional, Dict
-from typing_extensions import Literal
-from pydantic import StrictStr, Field
-try:
-    from typing import Self
-except ImportError:
-    from typing_extensions import Self
+from typing_extensions import Literal, Self
 
 {{#lambda.uppercase}}{{{classname}}}{{/lambda.uppercase}}_ANY_OF_SCHEMAS = [{{#anyOf}}"{{.}}"{{^-last}}, {{/-last}}{{/anyOf}}]
 

modules/openapi-generator/src/main/resources/python/model_anyof.mustache

@@ -1,15 +1,10 @@
 from __future__ import annotations
 import json
-import pprint
-import re  # noqa: F401
 from enum import Enum
-{{#vendorExtensions.x-py-datetime-imports}}{{#-first}}from datetime import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-datetime-imports}}
-{{#vendorExtensions.x-py-typing-imports}}{{#-first}}from typing import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-typing-imports}}
-{{#vendorExtensions.x-py-pydantic-imports}}{{#-first}}from pydantic import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-pydantic-imports}}
-try:
-    from typing import Self
-except ImportError:
-    from typing_extensions import Self
+{{#vendorExtensions.x-py-other-imports}}
+{{{.}}}
+{{/vendorExtensions.x-py-other-imports}}
+from typing_extensions import Self
 
 
 class {{classname}}({{vendorExtensions.x-py-enum-type}}, Enum):

modules/openapi-generator/src/main/resources/python/model_enum.mustache

@@ -3,9 +3,6 @@ import pprint
 import re  # noqa: F401
 import json
 
-{{#vendorExtensions.x-py-datetime-imports}}{{#-first}}from datetime import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-datetime-imports}}
-{{#vendorExtensions.x-py-typing-imports}}{{#-first}}from typing import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-typing-imports}}
-{{#vendorExtensions.x-py-pydantic-imports}}{{#-first}}from pydantic import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-pydantic-imports}}
 {{#vendorExtensions.x-py-other-imports}}
 {{{.}}}
 {{/vendorExtensions.x-py-other-imports}}

modules/openapi-generator/src/main/resources/python/model_generic.mustache

@@ -1,24 +1,15 @@
 from __future__ import annotations
-from inspect import getfullargspec
 import json
 import pprint
-import re  # noqa: F401
-{{#vendorExtensions.x-py-datetime-imports}}{{#-first}}from datetime import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-datetime-imports}}
-{{#vendorExtensions.x-py-typing-imports}}{{#-first}}from typing import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-typing-imports}}
-{{#vendorExtensions.x-py-pydantic-imports}}{{#-first}}from pydantic import{{/-first}} {{{.}}}{{^-last}},{{/-last}}{{/vendorExtensions.x-py-pydantic-imports}}
 {{#vendorExtensions.x-py-other-imports}}
 {{{.}}}
 {{/vendorExtensions.x-py-other-imports}}
 {{#vendorExtensions.x-py-model-imports}}
 {{{.}}}
 {{/vendorExtensions.x-py-model-imports}}
-from typing import Union, Any, List, TYPE_CHECKING, Optional, Dict
-from typing_extensions import Literal
 from pydantic import StrictStr, Field
-try:
-    from typing import Self
-except ImportError:
-    from typing_extensions import Self
+from typing import Union, List, Optional, Dict
+from typing_extensions import Literal, Self
 
 {{#lambda.uppercase}}{{{classname}}}{{/lambda.uppercase}}_ONE_OF_SCHEMAS = [{{#oneOf}}"{{.}}"{{^-last}}, {{/-last}}{{/oneOf}}]