Open AI env var fix (#2384)

embedchain/embedchain/embedder/openai.py

@@ -1,4 +1,5 @@
 import os
+import warnings
 from typing import Optional
 
 from chromadb.utils.embedding_functions import OpenAIEmbeddingFunction
@@ -16,7 +17,18 @@ class OpenAIEmbedder(BaseEmbedder):
             self.config.model = "text-embedding-ada-002"
 
         api_key = self.config.api_key or os.environ["OPENAI_API_KEY"]
-        api_base = self.config.api_base or os.environ.get("OPENAI_API_BASE")
+        api_base = (
+           self.config.api_base
+           or os.environ.get("OPENAI_API_BASE")
+           or os.getenv("OPENAI_BASE_URL")
+           or "https://api.openai.com/v1"
+        )
+        if os.environ.get("OPENAI_API_BASE"):
+            warnings.warn(
+                "The environment variable 'OPENAI_API_BASE' is deprecated and will be removed in the 0.1.140. "
+                "Please use 'OPENAI_BASE_URL' instead.",
+                DeprecationWarning
+            )
 
         if api_key is None and os.getenv("OPENAI_ORGANIZATION") is None:
             raise ValueError("OPENAI_API_KEY or OPENAI_ORGANIZATION environment variables not provided")  # noqa:E501