Issue #18755: Allow imp.load_*() loaders to have get_data() called

multiple times.

Lib/imp.py

@@ -90,13 +90,18 @@ class _HackedGetData:
     def get_data(self, path):
         """Gross hack to contort loader to deal w/ load_*()'s bad API."""
         if self.file and path == self.path:
-            with self.file:
+            if not self.file.closed:
+                file = self.file
+            else:
+                self.file = file = open(self.path, 'r')
+
+            with file:
                 # Technically should be returning bytes, but
                 # SourceLoader.get_code() just passed what is returned to
                 # compile() which can handle str. And converting to bytes would
                 # require figuring out the encoding to decode to and
                 # tokenize.detect_encoding() only accepts bytes.
-                return self.file.read()
+                return file.read()
         else:
             return super().get_data(path)