Catpure tuple-formed dict accesses

IPython/core/completer.py

@@ -1641,6 +1641,14 b' class IPCompleter(Completer):'
             )
             \[   # open bracket
             \s*  # and optional whitespace
+            ((?:[uUbB]?  # string prefix (r not handled)
+                (?:
+                    '(?:[^']|(?<!\\)\\')*'
+                |
+                    "(?:[^"]|(?<!\\)\\")*"
+                )
+                \s*,\s*
+            )*)
             ([uUbB]?  # string prefix (r not handled)
                 (?:   # unclosed string
                     '(?:[^']|(?<!\\)\\')*