fix(client): show a helpful error message if the v0 API is used (#743)

src/openai/__init__.py

@@ -74,6 +74,7 @@
 from .version import VERSION as VERSION
 from .lib.azure import AzureOpenAI as AzureOpenAI
 from .lib.azure import AsyncAzureOpenAI as AsyncAzureOpenAI
+from .lib._old_api import *
 
 _setup_logging()
 

src/openai/lib/_old_api.py

@@ -0,0 +1,66 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+from typing_extensions import override
+
+from .._utils import LazyProxy
+from .._exceptions import OpenAIError
+
+INSTRUCTIONS = """
+
+You tried to access openai.{symbol}, but this is no longer supported in openai>=1.0.0 - see the README at https://github.com/openai/openai-python for the API.
+
+You can run `openai migrate` to automatically upgrade your codebase to use the 1.0.0 interface. 
+
+Alternatively, you can pin your installation to the old version, e.g. `pip install openai==0.28`
+
+A detailed migration guide is available here: https://github.com/openai/openai-python/discussions/742
+"""
+
+
+class APIRemovedInV1(OpenAIError):
+    def __init__(self, *, symbol: str) -> None:
+        super().__init__(INSTRUCTIONS.format(symbol=symbol))
+
+
+class APIRemovedInV1Proxy(LazyProxy[None]):
+    def __init__(self, *, symbol: str) -> None:
+        super().__init__()
+        self._symbol = symbol
+
+    @override
+    def __load__(self) -> None:
+        raise APIRemovedInV1(symbol=self._symbol)
+
+
+SYMBOLS = [
+    "Edit",
+    "File",
+    "Audio",
+    "Image",
+    "Model",
+    "Engine",
+    "Customer",
+    "FineTune",
+    "Embedding",
+    "Completion",
+    "Deployment",
+    "Moderation",
+    "ErrorObject",
+    "FineTuningJob",
+    "ChatCompletion",
+]
+
+# we explicitly tell type checkers that nothing is exported
+# from this file so that when we re-export the old symbols
+# in `openai/__init__.py` they aren't added to the auto-complete
+# suggestions given by editors
+if TYPE_CHECKING:
+    __all__: list[str] = []
+else:
+    __all__ = SYMBOLS
+
+
+__locals = locals()
+for symbol in SYMBOLS:
+    __locals[symbol] = APIRemovedInV1Proxy(symbol=symbol)