@@ 68,13 68,13 @@ class RequestBindAdapter(BindAdapter):
     unnumbered_list_separator = "[]"
 
     def __init__(self):
-        unnumbered_list_pattern = "{0}(?P<U>)".format(
+        unnumbered_list_pattern = r"{0}(?P<U>)".format(
             re.escape(self.unnumbered_list_separator)
         )
-        numbered_list_pattern = "{0}(?P<N>\d+)".format(
+        numbered_list_pattern = r"{0}(?P<N>\d+)".format(
             re.escape(self.list_separator)
         )
-        dict_pattern = "{0}(?P<D>([^\.#\[]+))".format(
+        dict_pattern = r"{0}(?P<D>([^\.#\[]+))".format(
             re.escape(self.dict_separator)
         )
         self._finder = re.compile(

          
@@ 109,31 109,31 @@ class RequestBindAdapter(BindAdapter):
 
                 # Numbered list
                 elif match["N"] is not None:
-                    l = setval({})
-                    if l and identity not in list_surrogates:
+                    items = setval({})
+                    if items and identity not in list_surrogates:
                         self.warn_mixed_key(path)
                         continue
                     list_surrogates[(id(curdata), curkey)] = (
                         curdata,
                         curkey,
-                        l,
+                        items,
                     )
-                    curdata = l
+                    curdata = items
                     curkey = match["N"]
                     setval = partial(curdata.setdefault, curkey)
 
                 # Unnumbered list
                 elif match["U"] is not None:
-                    l = setval({})
-                    if l and identity not in list_surrogates:
+                    items = setval({})
+                    if items and identity not in list_surrogates:
                         self.warn_mixed_key(path)
                         continue
                     list_surrogates[(id(curdata), curkey)] = (
                         curdata,
                         curkey,
-                        l,
+                        items,
                     )
-                    curdata = l
+                    curdata = items
                     curkey = len(curdata)
                     setval = partial(curdata.setdefault, curkey)