error

KeyError                                  Traceback (most recent call last)
/media/DATA/arxeia/Projects/<ipython-input-14-8cdc9e94ba72> in <module>()
----> 1 df.sort([0, 1, 3]).reset_index(drop=True).groupby([0, 1, 2]).apply(func)

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/groupby.pyc in apply(self, func, *args, **kwargs)
    320         func = _intercept_function(func)
    321         f = lambda g: func(g, *args, **kwargs)
--> 322         return self._python_apply_general(f)
    323
    324     def _python_apply_general(self, f):

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/groupby.pyc in _python_apply_general(self, f)
    323
    324     def _python_apply_general(self, f):
--> 325         keys, values, mutated = self.grouper.apply(f, self.obj, self.axis)
    326
    327         return self._wrap_applied_output(keys, values,

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/groupby.pyc in apply(self, f, data, axis, keep_internal)
    594             # group might be modified

    595             group_axes = _get_axes(group)
--> 596             res = f(group)
    597             if not _is_indexed_like(res, group_axes):
    598                 mutated = True

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/groupby.pyc in <lambda>(g)
    319         """
    320         func = _intercept_function(func)
--> 321         f = lambda g: func(g, *args, **kwargs)
    322         return self._python_apply_general(f)
    323

/media/DATA/arxeia/Projects/<ipython-input-13-4d16cae39798> in func(df)
      5         s.append(rw[4])
      6         s.append(rw[5])
----> 7         s.append(rw[6])
      8         s.append(rw[7])
      9         s.append(rw[8])

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/series.pyc in __getitem__(self, key)
    501     def __getitem__(self, key):
    502         try:
--> 503             return self.index.get_value(self, key)
    504         except InvalidIndexError:
    505             pass

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/core/index.pyc in get_value(self, series, key)
    724         """
    725         try:
--> 726             return self._engine.get_value(series, key)
    727         except KeyError, e1:
    728             if len(self) > 0 and self.inferred_type == 'integer':

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/index.so in pandas.index.IndexEngine.get_value (pandas/index.c:2559)()

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/index.so in pandas.index.IndexEngine.get_value (pandas/index.c:2374)()

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/index.so in pandas.index.IndexEngine.get_loc (pandas/index.c:3111)()

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/hashtable.so in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:6427)()

/usr/lib64/python2.7/site-packages/pandas-0.10.1-py2.7-linux-x86_64.egg/pandas/hashtable.so in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:6371)()

KeyError: 6