[NumPy-Tickets] [NumPy] #1658: arrays with 0-length unicode strings does not unpickle well

[NumPy Trac]

#1658: arrays with 0-length unicode strings does not unpickle well
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 Reporter:  faltet  |       Owner:  somebody   
     Type:  defect  |      Status:  new        
 Priority:  normal  |   Milestone:  Unscheduled
Component:  Other   |     Version:  1.5.0      
 Keywords:          |  
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 This reproduces the problem:

 {{{
 >>> pickle.loads(pickle.dumps(np.array(u'a')))  # 1-length works well

 array(u'a',
       dtype='<U1')

 >>> pickle.loads(pickle.dumps(np.array(u'')))  # 0-length does not work
 ---------------------------------------------------------------------------
 TypeError                                 Traceback (most recent call
 last)

 /tmp/tables-2.2/<ipython console> in <module>()

 /usr/local/lib/python2.6/pickle.pyc in loads(str)
    1372 def loads(str):
    1373     file = StringIO(str)
 -> 1374     return Unpickler(file).load()
    1375
    1376 # Doctest


 /usr/local/lib/python2.6/pickle.pyc in load(self)
     856             while 1:
     857                 key = read(1)
 --> 858                 dispatch[key](self)
     859         except _Stop, stopinst:
     860             return stopinst.value

 /usr/local/lib/python2.6/pickle.pyc in load_reduce(self)
    1131         args = stack.pop()
    1132         func = stack[-1]
 -> 1133         value = func(*args)
    1134         stack[-1] = value
    1135     dispatch[REDUCE] = load_reduce

 TypeError: data type not understood

 }}}

-- 
Ticket URL: <http://projects.scipy.org/numpy/ticket/1658>
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