FIX: Give Windows time to decide files are closed

Author: effigies

nibabel/tmpdirs.py

@@ -10,6 +10,7 @@
 '''
 from __future__ import division, print_function, absolute_import
 import os
+import time
 import shutil
 from tempfile import template, mkdtemp
 
@@ -41,7 +42,16 @@ def __enter__(self):
 
     def cleanup(self):
         if not self._closed:
-            shutil.rmtree(self.name)
+            # Account for latency in Windows releasing open files
+            # for deletion
+            for i in range(50):
+                try:
+                    shutil.rmtree(self.name)
+                    break
+                except (OSError, WindowsError):
+                    if i == 49:
+                        raise
+                    time.sleep(0.1)
             self._closed = True
 
     def __exit__(self, exc, value, tb):