[Ipython-tickets] [IPython] #188: _ih object getting modified by calls to %hist

[IPython]

#188: _ih object getting modified by calls to %hist
---------------------+------------------------------------------------------
 Reporter:  fperez   |       Owner:  vivainio
     Type:  defect   |      Status:  new     
 Priority:  normal   |   Milestone:          
Component:  ipython  |     Version:          
 Severity:  normal   |    Keywords:          
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 Consider the following:

 {{{
 In [1]: 44
 Out[1]: 44

 In [2]: _ih
 Out[2]: ['\n', u'44\n', u'_ih\n']

 In [3]: %hist -r
 1: 44
 2: _ih
 3: %hist -r

 In [4]: _ih
 Out[4]: ['\n', u'44\n', u'_ih\n', u'_ip.magic("hist -r")\n', u'_ih\n']

 In [5]: %hist -r
 1: 44
 2: _ih
 3: %hist -r
 4: _ih
 5: %hist -r

 In [6]: _ih
 Out[6]:
 ['\n',
  u'4',
  u'4',
  u'\n',
  u'_',
  u'i',
  u'h',
  u'\n',
  u'_',
  u'i',
  u'p',
  u'.',
  u'm',
  u'a',
  u'g',
  u'i',
  u'c',
  u'(',
  u'"',
  u'h',

 etc...
 }}}

 It appears that once there are magics in the history, a call to %hist -r
 overwrites the _ih object, turning it from a list of lines into a list of
 characters.

-- 
Ticket URL: <http://ipython.scipy.org/ipython/ipython/ticket/188>
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