fix(anthropic.py): drop unsupported non-whitespace character value when calling anthropic with stop sequences

Fixes https://github.com/BerriAI/litellm/issues/3286

litellm/llms/anthropic.py

@@ -84,6 +84,48 @@ class AnthropicConfig:
             and v is not None
         }
 
+    def get_supported_openai_params(self):
+        return [
+            "stream",
+            "stop",
+            "temperature",
+            "top_p",
+            "max_tokens",
+            "tools",
+            "tool_choice",
+        ]
+
+    def map_openai_params(self, non_default_params: dict, optional_params: dict):
+        for param, value in non_default_params.items():
+            if param == "max_tokens":
+                optional_params["max_tokens"] = value
+            if param == "tools":
+                optional_params["tools"] = value
+            if param == "stream":
+                optional_params["stream"] = value
+            if param == "stop":
+                if isinstance(value, str):
+                    if (
+                        value == "\n"
+                    ):  # anthropic doesn't allow whitespace characters as stop-sequences
+                        continue
+                    value = [value]
+                elif isinstance(value, list):
+                    new_v = []
+                    for v in value:
+                        if (
+                            v == "\n"
+                        ):  # anthropic doesn't allow whitespace characters as stop-sequences
+                            continue
+                        new_v.append(v)
+                    value = new_v
+                optional_params["stop_sequences"] = value
+            if param == "temperature":
+                optional_params["temperature"] = value
+            if param == "top_p":
+                optional_params["top_p"] = value
+        return optional_params
+
 
 # makes headers for API call
 def validate_environment(api_key, user_headers):