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[IMPR] Provide an object representation for DequeGenerator

Provide an object representation for DequeGenerator
without clearing the content

Change-Id: I55e4da4281eb7628164e11f7751db1bbe6f2c74d
---
M pywikibot/tools/__init__.py
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pywikibot/tools/__init__.py b/pywikibot/tools/__init__.py
index 2274554..9eb2bba 100644
--- a/pywikibot/tools/__init__.py
+++ b/pywikibot/tools/__init__.py
@@ -960,10 +960,17 @@
 
     def __next__(self):
         """Iterator method."""
-        if len(self):
+        if self:
             return self.popleft()
         raise StopIteration
 
+    def __repr__(self):
+        """Provide an object representation without clearing the content."""
+        items = list(self)
+        result = '{}({})'.format(self.__class__.__name__, items)
+        self.extend(items)
+        return result
+
 
 def open_archive(filename, mode='rb', use_extension=True):
     """

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