Remove mutable dict from default argument

pytest-dev · Jul 9, 2015 · 33752dc · 33752dc
1 parent e5e2a95
commit 33752dc
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/_pytest/config.py b/_pytest/config.py
@@ -674,7 +674,9 @@ def _addoption_instance(self, option, shortupper=False):
 
 
 class MyOptionParser(argparse.ArgumentParser):
-    def __init__(self, parser, extra_info={}):
+    def __init__(self, parser, extra_info=None):
+        if not extra_info:
+            extra_info = {}
         self._parser = parser
         argparse.ArgumentParser.__init__(self, usage=parser._usage,
             add_help=False, formatter_class=DropShorterLongHelpFormatter)