refactor: refactor python sdk (#28118)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

sdks/python-client/dify_client/exceptions.py

@@ -0,0 +1,71 @@
+"""Custom exceptions for the Dify client."""
+
+from typing import Optional, Dict, Any
+
+
+class DifyClientError(Exception):
+    """Base exception for all Dify client errors."""
+
+    def __init__(self, message: str, status_code: int | None = None, response: Dict[str, Any] | None = None):
+        super().__init__(message)
+        self.message = message
+        self.status_code = status_code
+        self.response = response
+
+
+class APIError(DifyClientError):
+    """Raised when the API returns an error response."""
+
+    def __init__(self, message: str, status_code: int, response: Dict[str, Any] | None = None):
+        super().__init__(message, status_code, response)
+        self.status_code = status_code
+
+
+class AuthenticationError(DifyClientError):
+    """Raised when authentication fails."""
+
+    pass
+
+
+class RateLimitError(DifyClientError):
+    """Raised when rate limit is exceeded."""
+
+    def __init__(self, message: str = "Rate limit exceeded", retry_after: int | None = None):
+        super().__init__(message)
+        self.retry_after = retry_after
+
+
+class ValidationError(DifyClientError):
+    """Raised when request validation fails."""
+
+    pass
+
+
+class NetworkError(DifyClientError):
+    """Raised when network-related errors occur."""
+
+    pass
+
+
+class TimeoutError(DifyClientError):
+    """Raised when request times out."""
+
+    pass
+
+
+class FileUploadError(DifyClientError):
+    """Raised when file upload fails."""
+
+    pass
+
+
+class DatasetError(DifyClientError):
+    """Raised when dataset operations fail."""
+
+    pass
+
+
+class WorkflowError(DifyClientError):
+    """Raised when workflow operations fail."""
+
+    pass