fix: Cross-Platform File URI for Processing

src/sagemaker/processing.py

@@ -21,6 +21,7 @@
 import pathlib
 
 from six.moves.urllib.parse import urlparse
+from six.moves.urllib.request import url2pathname
 
 from sagemaker import s3
 from sagemaker.job import _Job
@@ -535,21 +536,22 @@ def _handle_user_code_url(self, code):
             user_code_s3_uri = code
         elif code_url.scheme == "" or code_url.scheme == "file":
             # Validate that the file exists locally and is not a directory.
-            if not os.path.exists(code):
+            code_path = url2pathname(code_url.path)
+            if not os.path.exists(code_path):
                 raise ValueError(
                     """code {} wasn't found. Please make sure that the file exists.
                     """.format(
                         code
                     )
                 )
-            if not os.path.isfile(code):
+            if not os.path.isfile(code_path):
                 raise ValueError(
                     """code {} must be a file, not a directory. Please pass a path to a file.
                     """.format(
                         code
                     )
                 )
-            user_code_s3_uri = self._upload_code(code)
+            user_code_s3_uri = self._upload_code(code_path)
         else:
             raise ValueError(
                 "code {} url scheme {} is not recognized. Please pass a file path or S3 url".format(