Commits on Apr 27, 2015

1. cbook.is_sequence_of_strings knows string objects …

   **Issue**
   `cbook.is_sequence_of_strings` cannot tell of a pandas series
   is contains strings. Pandas series are numpy arrays of type
   `object`.
   
   **Problem**
   `cbook.is_sequence_of_strings` uses `cbook.is_string_like` to dismiss
   strings as not sequences of strings. However, numpy string arrays
   of `dtype=object` are string-like since they support string
   concatenation.
   
   **Solution**
   Do not dismiss an `ndarray` if it appears string-like, go ahead and
   peak inside.

   

   has2k1 committed Apr 27, 2015
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