[GitHub] szha commented on a change in pull request #12572: Make Gluon download function to be atomic

[GitBox <gi...@apache.org>]

szha commented on a change in pull request #12572: Make Gluon download function to be atomic
URL: https://github.com/apache/incubator-mxnet/pull/12572#discussion_r223442274
 
 

 ##########
 File path: python/mxnet/gluon/utils.py
 ##########
 @@ -195,6 +197,59 @@ def check_sha1(filename, sha1_hash):
     return sha1.hexdigest() == sha1_hash
 
 
+if not sys.platform.startswith('win32'):
+    # refer to https://github.com/untitaker/python-atomicwrites
+    def _replace_atomic(src, dst):
+        """Implement atomic os.replace with linux and OSX. Internal use only"""
+        try:
+            os.rename(src, dst)
+        except OSError:
+            try:
+                os.remove(src)
+            except OSError:
+                pass
+            raise OSError(
 
 Review comment:
   include this part in a finally block

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