def _get_value(f, i, values=False):
 if values:
  return f.values[i]
 with catch_warnings(record=True):
  return f.ix[i]

def _get_value ( f , i , values = False ) : if values : return f . values [ i ] with catch_warnings ( record = True ) : return f . ix [ i ]
retrieve a keys value from a context item .