# pylint: disable=E1101

from pandas.util.py3compat import StringIO, BytesIO, PY3
from datetime import datetime
from os.path import split as psplit
import csv
import os
import sys
import re
import unittest

import nose

from numpy import nan
import numpy as np

from pandas import DataFrame, Series, Index, MultiIndex, DatetimeIndex
import pandas.io.parsers as parsers
from pandas.io.parsers import (read_csv, read_table, read_fwf,
                               ExcelFile, TextFileReader, TextParser)
from pandas.util.testing import (assert_almost_equal,
                                 assert_series_equal, network)
import pandas.util.testing as tm
import pandas as pd

import pandas.lib as lib
from pandas.util import py3compat
from pandas.lib import Timestamp
from pandas.tseries.index import date_range
import pandas.tseries.tools as tools

from numpy.testing.decorators import slow

from pandas._parser import OverflowError

from pandas.io.parsers import (ExcelFile, ExcelWriter, read_csv)

def _skip_if_no_xlrd():
    try:
        import xlrd
    except ImportError:
        raise nose.SkipTest('xlrd not installed, skipping')

def _skip_if_no_xlwt():
    try:
        import xlwt
    except ImportError:
        raise nose.SkipTest('xlwt not installed, skipping')

def _skip_if_no_openpyxl():
    try:
        import openpyxl
    except ImportError:
        raise nose.SkipTest('openpyxl not installed, skipping')

def _skip_if_no_excelsuite():
    _skip_if_no_xlrd()
    _skip_if_no_xlwt()
    _skip_if_no_openpyxl()


def curpath():
    pth, _ = os.path.split(os.path.abspath(__file__))
    return pth

_seriesd = tm.getSeriesData()
_tsd = tm.getTimeSeriesData()
_frame = DataFrame(_seriesd)[:10]
_frame2 = DataFrame(_seriesd, columns=['D', 'C', 'B', 'A'])[:10]
_tsframe = tm.makeTimeDataFrame()[:5]
_mixed_frame = _frame.copy()
_mixed_frame['foo'] = 'bar'


class ExcelTests(unittest.TestCase):

    def setUp(self):
        self.dirpath = curpath()
        self.csv1 = os.path.join(self.dirpath, 'test1.csv')
        self.csv2 = os.path.join(self.dirpath, 'test2.csv')
        self.xls1 = os.path.join(self.dirpath, 'test.xls')
        self.frame = _frame.copy()
        self.frame2 = _frame2.copy()
        self.tsframe = _tsframe.copy()
        self.mixed_frame = _mixed_frame.copy()

    def test_parse_cols_int(self):
        _skip_if_no_openpyxl()
        _skip_if_no_xlrd()

        suffix = ['', 'x']

        for s in suffix:
            pth = os.path.join(self.dirpath, 'test.xls%s' % s)
            xls = ExcelFile(pth)
            df = xls.parse('Sheet1', index_col=0, parse_dates=True,
                            parse_cols=3)
            df2 = self.read_csv(self.csv1, index_col=0, parse_dates=True)
            df2 = df2.reindex(columns=['A', 'B', 'C'])
            df3 = xls.parse('Sheet2', skiprows=[1], index_col=0,
                            parse_dates=True, parse_cols=3)
            tm.assert_frame_equal(df, df2)
            tm.assert_frame_equal(df3, df2)

    def test_parse_cols_list(self):
        _skip_if_no_openpyxl()
        _skip_if_no_xlrd()

        suffix = ['', 'x']

        for s in suffix:
            pth = os.path.join(self.dirpath, 'test.xls%s' % s)
            xls = ExcelFile(pth)
            df = xls.parse('Sheet1', index_col=0, parse_dates=True,
                            parse_cols=[0, 2, 3])
            df2 = self.read_csv(self.csv1, index_col=0, parse_dates=True)
            df2 = df2.reindex(columns=['B', 'C'])
            df3 = xls.parse('Sheet2', skiprows=[1], index_col=0,
                             parse_dates=True,
                             parse_cols=[0, 2, 3])
            tm.assert_frame_equal(df, df2)
            tm.assert_frame_equal(df3, df2)

    def test_parse_cols_str(self):
        _skip_if_no_openpyxl()
        _skip_if_no_xlrd()

        suffix = ['', 'x']

        for s in suffix:

            pth = os.path.join(self.dirpath, 'test.xls%s' % s)
            xls = ExcelFile(pth)

            df = xls.parse('Sheet1', index_col=0, parse_dates=True,
                            parse_cols='A:D')
            df2 = read_csv(self.csv1, index_col=0, parse_dates=True)
            df2 = df2.reindex(columns=['A', 'B', 'C'])
            df3 = xls.parse('Sheet2', skiprows=[1], index_col=0,
                            parse_dates=True, parse_cols='A:D')
            tm.assert_frame_equal(df, df2)
            tm.assert_frame_equal(df3, df2)
            del df, df2, df3

            df = xls.parse('Sheet1', index_col=0, parse_dates=True,
                            parse_cols='A,C,D')
            df2 = read_csv(self.csv1, index_col=0, parse_dates=True)
            df2 = df2.reindex(columns=['B', 'C'])
            df3 = xls.parse('Sheet2', skiprows=[1], index_col=0,
                             parse_dates=True,
                             parse_cols='A,C,D')
            tm.assert_frame_equal(df, df2)
            tm.assert_frame_equal(df3, df2)
            del df, df2, df3

            df = xls.parse('Sheet1', index_col=0, parse_dates=True,
                            parse_cols='A,C:D')
            df2 = read_csv(self.csv1, index_col=0, parse_dates=True)
            df2 = df2.reindex(columns=['B', 'C'])
            df3 = xls.parse('Sheet2', skiprows=[1], index_col=0,
                             parse_dates=True,
                             parse_cols='A,C:D')
            tm.assert_frame_equal(df, df2)
            tm.assert_frame_equal(df3, df2)

    def test_excel_stop_iterator(self):
        _skip_if_no_xlrd()

        excel_data = ExcelFile(os.path.join(self.dirpath, 'test2.xls'))
        parsed = excel_data.parse('Sheet1')
        expected = DataFrame([['aaaa','bbbbb']], columns=['Test', 'Test1'])
        tm.assert_frame_equal(parsed, expected)

    def test_excel_cell_error_na(self):
        _skip_if_no_xlrd()

        excel_data = ExcelFile(os.path.join(self.dirpath, 'test3.xls'))
        parsed = excel_data.parse('Sheet1')
        expected = DataFrame([[np.nan]], columns=['Test'])
        tm.assert_frame_equal(parsed, expected)

    def test_excel_table(self):
        _skip_if_no_xlrd()

        pth = os.path.join(self.dirpath, 'test.xls')
        xls = ExcelFile(pth)
        df = xls.parse('Sheet1', index_col=0, parse_dates=True)
        df2 = self.read_csv(self.csv1, index_col=0, parse_dates=True)
        df3 = xls.parse('Sheet2', skiprows=[1], index_col=0, parse_dates=True)
        tm.assert_frame_equal(df, df2)
        tm.assert_frame_equal(df3, df2)

        df4 = xls.parse('Sheet1', index_col=0, parse_dates=True,
                        skipfooter=1)
        df5 = xls.parse('Sheet1', index_col=0, parse_dates=True,
                        skip_footer=1)
        tm.assert_frame_equal(df4, df.ix[:-1])
        tm.assert_frame_equal(df4, df5)

    def test_excel_read_buffer(self):
        _skip_if_no_xlrd()
        _skip_if_no_openpyxl()

        pth = os.path.join(self.dirpath, 'test.xls')
        f = open(pth, 'rb')
        xls = ExcelFile(f)
        # it works
        xls.parse('Sheet1', index_col=0, parse_dates=True)

        pth = os.path.join(self.dirpath, 'test.xlsx')
        f = open(pth, 'rb')
        xl = ExcelFile(f)
        df = xl.parse('Sheet1', index_col=0, parse_dates=True)

    def test_xlsx_table(self):
        _skip_if_no_openpyxl()

        pth = os.path.join(self.dirpath, 'test.xlsx')
        xlsx = ExcelFile(pth)
        df = xlsx.parse('Sheet1', index_col=0, parse_dates=True)
        df2 = self.read_csv(self.csv1, index_col=0, parse_dates=True)
        df3 = xlsx.parse('Sheet2', skiprows=[1], index_col=0, parse_dates=True)
        tm.assert_frame_equal(df, df2)
        tm.assert_frame_equal(df3, df2)

        df4 = xlsx.parse('Sheet1', index_col=0, parse_dates=True,
                         skipfooter=1)
        df5 = xlsx.parse('Sheet1', index_col=0, parse_dates=True,
                         skip_footer=1)
        tm.assert_frame_equal(df4, df.ix[:-1])
        tm.assert_frame_equal(df4, df5)

    def read_csv(self, *args, **kwds):
        kwds = kwds.copy()
        kwds['engine'] = 'python'
        return read_csv(*args, **kwds)


    def test_excel_roundtrip_xls(self):
        _skip_if_no_excelsuite()
        self._check_extension('xls')

    def test_excel_roundtrip_xlsx(self):
        _skip_if_no_excelsuite()
        self._check_extension('xlsx')

    def _check_extension(self, ext):
        path = '__tmp_to_excel_from_excel__.' + ext

        self.frame['A'][:5] = nan

        self.frame.to_excel(path,'test1')
        self.frame.to_excel(path,'test1', cols=['A', 'B'])
        self.frame.to_excel(path,'test1', header=False)
        self.frame.to_excel(path,'test1', index=False)

        # test roundtrip
        self.frame.to_excel(path,'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1', index_col=0)
        tm.assert_frame_equal(self.frame, recons)

        self.frame.to_excel(path,'test1', index=False)
        reader = ExcelFile(path)
        recons = reader.parse('test1', index_col=None)
        recons.index = self.frame.index
        tm.assert_frame_equal(self.frame, recons)

        self.frame.to_excel(path,'test1',na_rep='NA')
        reader = ExcelFile(path)
        recons = reader.parse('test1', index_col=0, na_values=['NA'])
        tm.assert_frame_equal(self.frame, recons)

        os.remove(path)

    def test_excel_roundtrip_xls_mixed(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()

        self._check_extension_mixed('xls')

    def test_excel_roundtrip_xlsx_mixed(self):
        _skip_if_no_openpyxl()

        self._check_extension_mixed('xlsx')

    def _check_extension_mixed(self, ext):
        path = '__tmp_to_excel_from_excel_mixed__.' + ext

        self.mixed_frame.to_excel(path,'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1', index_col=0)
        tm.assert_frame_equal(self.mixed_frame, recons)

        os.remove(path)

    def test_excel_roundtrip_xls_tsframe(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()

        self._check_extension_tsframe('xls')

    def test_excel_roundtrip_xlsx_tsframe(self):
        _skip_if_no_openpyxl()
        self._check_extension_tsframe('xlsx')

    def _check_extension_tsframe(self, ext):
        path = '__tmp_to_excel_from_excel_tsframe__.' + ext

        df = tm.makeTimeDataFrame()[:5]

        df.to_excel(path, 'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1')
        tm.assert_frame_equal(df, recons)

        os.remove(path)

    def test_excel_roundtrip_xls_int64(self):
        _skip_if_no_excelsuite()
        self._check_extension_int64('xls')

    def test_excel_roundtrip_xlsx_int64(self):
        _skip_if_no_excelsuite()
        self._check_extension_int64('xlsx')

    def _check_extension_int64(self, ext):
        path = '__tmp_to_excel_from_excel_int64__.' + ext

        self.frame['A'][:5] = nan

        self.frame.to_excel(path,'test1')
        self.frame.to_excel(path,'test1', cols=['A', 'B'])
        self.frame.to_excel(path,'test1', header=False)
        self.frame.to_excel(path,'test1', index=False)

        #Test np.int64, values read come back as float
        frame = DataFrame(np.random.randint(-10,10,size=(10,2)))
        frame.to_excel(path,'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1').astype(np.int64)
        tm.assert_frame_equal(frame, recons)

        os.remove(path)

    def test_excel_roundtrip_xls_bool(self):
        _skip_if_no_excelsuite()
        self._check_extension_bool('xls')

    def test_excel_roundtrip_xlsx_bool(self):
        _skip_if_no_excelsuite()
        self._check_extension_bool('xlsx')


    def _check_extension_bool(self, ext):
        path = '__tmp_to_excel_from_excel_bool__.' + ext

        self.frame['A'][:5] = nan

        self.frame.to_excel(path,'test1')
        self.frame.to_excel(path,'test1', cols=['A', 'B'])
        self.frame.to_excel(path,'test1', header=False)
        self.frame.to_excel(path,'test1', index=False)

        #Test reading/writing np.bool8, roundtrip only works for xlsx
        frame = (DataFrame(np.random.randn(10,2)) >= 0)
        frame.to_excel(path,'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1').astype(np.bool8)
        tm.assert_frame_equal(frame, recons)

        os.remove(path)

    def test_excel_roundtrip_xls_sheets(self):
        _skip_if_no_excelsuite()
        self._check_extension_sheets('xls')

    def test_excel_roundtrip_xlsx_sheets(self):
        _skip_if_no_excelsuite()
        self._check_extension_sheets('xlsx')


    def _check_extension_sheets(self, ext):
        path = '__tmp_to_excel_from_excel_sheets__.' + ext

        self.frame['A'][:5] = nan

        self.frame.to_excel(path,'test1')
        self.frame.to_excel(path,'test1', cols=['A', 'B'])
        self.frame.to_excel(path,'test1', header=False)
        self.frame.to_excel(path,'test1', index=False)

        # Test writing to separate sheets
        writer = ExcelWriter(path)
        self.frame.to_excel(writer,'test1')
        self.tsframe.to_excel(writer,'test2')
        writer.save()
        reader = ExcelFile(path)
        recons = reader.parse('test1',index_col=0)
        tm.assert_frame_equal(self.frame, recons)
        recons = reader.parse('test2',index_col=0)
        tm.assert_frame_equal(self.tsframe, recons)
        np.testing.assert_equal(2, len(reader.sheet_names))
        np.testing.assert_equal('test1', reader.sheet_names[0])
        np.testing.assert_equal('test2', reader.sheet_names[1])

        os.remove(path)

    def test_excel_roundtrip_xls_colaliases(self):
        _skip_if_no_excelsuite()
        self._check_extension_colaliases('xls')

    def test_excel_roundtrip_xlsx_colaliases(self):
        _skip_if_no_excelsuite()
        self._check_extension_colaliases('xlsx')

    def _check_extension_colaliases(self, ext):
        path = '__tmp_to_excel_from_excel_aliases__.' + ext

        self.frame['A'][:5] = nan

        self.frame.to_excel(path,'test1')
        self.frame.to_excel(path,'test1', cols=['A', 'B'])
        self.frame.to_excel(path,'test1', header=False)
        self.frame.to_excel(path,'test1', index=False)

        # column aliases
        col_aliases = Index(['AA', 'X', 'Y', 'Z'])
        self.frame2.to_excel(path, 'test1', header=col_aliases)
        reader = ExcelFile(path)
        rs = reader.parse('test1', index_col=0)
        xp = self.frame2.copy()
        xp.columns = col_aliases
        tm.assert_frame_equal(xp, rs)

        os.remove(path)

    def test_excel_roundtrip_xls_indexlabels(self):
        _skip_if_no_excelsuite()
        self._check_extension_indexlabels('xls')

    def test_excel_roundtrip_xlsx_indexlabels(self):
        _skip_if_no_excelsuite()
        self._check_extension_indexlabels('xlsx')

    def _check_extension_indexlabels(self, ext):
        path = '__tmp_to_excel_from_excel_indexlabels__.' + ext
        try:
            self.frame['A'][:5] = nan

            self.frame.to_excel(path,'test1')
            self.frame.to_excel(path,'test1', cols=['A', 'B'])
            self.frame.to_excel(path,'test1', header=False)
            self.frame.to_excel(path,'test1', index=False)

            # test index_label
            frame = (DataFrame(np.random.randn(10,2)) >= 0)
            frame.to_excel(path, 'test1', index_label=['test'])
            reader = ExcelFile(path)
            recons = reader.parse('test1', index_col=0).astype(np.int64)
            frame.index.names = ['test']
            self.assertEqual(frame.index.names, recons.index.names)

            frame = (DataFrame(np.random.randn(10,2)) >= 0)
            frame.to_excel(path, 'test1', index_label=['test', 'dummy', 'dummy2'])
            reader = ExcelFile(path)
            recons = reader.parse('test1', index_col=0).astype(np.int64)
            frame.index.names = ['test']
            self.assertEqual(frame.index.names, recons.index.names)

            frame = (DataFrame(np.random.randn(10,2)) >= 0)
            frame.to_excel(path, 'test1', index_label='test')
            reader = ExcelFile(path)
            recons = reader.parse('test1', index_col=0).astype(np.int64)
            frame.index.names = ['test']
            self.assertEqual(frame.index.names, recons.index.names)
        finally:
            os.remove(path)

        #test index_labels in same row as column names
        path = '%s.xls' % tm.rands(10)
        try:
            self.frame.to_excel(path, 'test1',
                                cols=['A', 'B', 'C', 'D'], index=False)
            #take 'A' and 'B' as indexes (they are in same row as cols 'C', 'D')
            df = self.frame.copy()
            df = df.set_index(['A', 'B'])

            reader = ExcelFile(path)
            recons = reader.parse('test1', index_col=[0, 1])
            tm.assert_frame_equal(df, recons)
        finally:
            os.remove(path)

    def test_excel_roundtrip_indexname(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()

        path = '%s.xls' % tm.rands(10)

        df = DataFrame(np.random.randn(10, 4))
        df.index.name = 'foo'

        df.to_excel(path)

        xf = ExcelFile(path)
        result = xf.parse(xf.sheet_names[0], index_col=0)

        tm.assert_frame_equal(result, df)
        self.assertEqual(result.index.name, 'foo')

        try:
            os.remove(path)
        except os.error:
            pass

    def test_excel_roundtrip_datetime(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()
        # datetime.date, not sure what to test here exactly
        path = '__tmp_excel_roundtrip_datetime__.xls'
        tsf = self.tsframe.copy()
        tsf.index = [x.date() for x in self.tsframe.index]
        tsf.to_excel(path, 'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1')
        tm.assert_frame_equal(self.tsframe, recons)
        os.remove(path)

    def test_excel_roundtrip_bool(self):
        _skip_if_no_openpyxl()

        #Test roundtrip np.bool8, does not seem to work for xls
        path = '__tmp_excel_roundtrip_bool__.xlsx'
        frame = (DataFrame(np.random.randn(10,2)) >= 0)
        frame.to_excel(path,'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1')
        tm.assert_frame_equal(frame, recons)
        os.remove(path)

    def test_to_excel_periodindex(self):
        _skip_if_no_excelsuite()
        for ext in ['xls', 'xlsx']:
            path = '__tmp_to_excel_periodindex__.' + ext
            frame = self.tsframe
            xp = frame.resample('M', kind='period')
            xp.to_excel(path, 'sht1')

            reader = ExcelFile(path)
            rs = reader.parse('sht1', index_col=0, parse_dates=True)
            tm.assert_frame_equal(xp, rs.to_period('M'))
            os.remove(path)

    def test_to_excel_multiindex(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()

        self._check_excel_multiindex('xls')

    def test_to_excel_multiindex_xlsx(self):
        _skip_if_no_openpyxl()
        self._check_excel_multiindex('xlsx')

    def _check_excel_multiindex(self, ext):
        path = '__tmp_to_excel_multiindex__' + ext + '__.'+ext

        frame = self.frame
        old_index = frame.index
        arrays = np.arange(len(old_index)*2).reshape(2,-1)
        new_index = MultiIndex.from_arrays(arrays,
                                           names=['first', 'second'])
        frame.index = new_index
        frame.to_excel(path, 'test1', header=False)
        frame.to_excel(path, 'test1', cols=['A', 'B'])

        # round trip
        frame.to_excel(path, 'test1')
        reader = ExcelFile(path)
        df = reader.parse('test1', index_col=[0,1], parse_dates=False)
        tm.assert_frame_equal(frame, df)
        self.assertEqual(frame.index.names, df.index.names)
        self.frame.index = old_index # needed if setUP becomes a classmethod

        os.remove(path)

    def test_to_excel_multiindex_dates(self):
        _skip_if_no_xlrd()
        _skip_if_no_xlwt()
        self._check_excel_multiindex_dates('xls')

    def test_to_excel_multiindex_xlsx_dates(self):
        _skip_if_no_openpyxl()
        self._check_excel_multiindex_dates('xlsx')

    def _check_excel_multiindex_dates(self, ext):
        path = '__tmp_to_excel_multiindex_dates__' + ext + '__.' + ext

        # try multiindex with dates
        tsframe = self.tsframe
        old_index = tsframe.index
        new_index = [old_index, np.arange(len(old_index))]
        tsframe.index = MultiIndex.from_arrays(new_index)

        tsframe.to_excel(path, 'test1', index_label = ['time','foo'])
        reader = ExcelFile(path)
        recons = reader.parse('test1', index_col=[0,1])
        tm.assert_frame_equal(tsframe, recons)

        # infer index
        tsframe.to_excel(path, 'test1')
        reader = ExcelFile(path)
        recons = reader.parse('test1')
        tm.assert_frame_equal(tsframe, recons)

        self.tsframe.index = old_index # needed if setUP becomes classmethod

        os.remove(path)

    def test_to_excel_float_format(self):
        _skip_if_no_excelsuite()
        for ext in ['xls', 'xlsx']:
            filename = '__tmp_to_excel_float_format__.' + ext
            df = DataFrame([[0.123456, 0.234567, 0.567567],
                            [12.32112, 123123.2, 321321.2]],
                           index=['A', 'B'], columns=['X', 'Y', 'Z'])
            df.to_excel(filename, 'test1', float_format='%.2f')

            reader = ExcelFile(filename)
            rs = reader.parse('test1', index_col=None)
            xp = DataFrame([[0.12, 0.23, 0.57],
                            [12.32, 123123.20, 321321.20]],
                           index=['A', 'B'], columns=['X', 'Y', 'Z'])
            tm.assert_frame_equal(rs, xp)
            os.remove(filename)

    def test_to_excel_unicode_filename(self):
        _skip_if_no_excelsuite()

        for ext in ['xls', 'xlsx']:
            filename = u'\u0192u.' + ext

            try:
                f = open(filename, 'wb')
            except UnicodeEncodeError:
                raise nose.SkipTest('no unicode file names on this system')
            else:
                f.close()

            df = DataFrame([[0.123456, 0.234567, 0.567567],
                            [12.32112, 123123.2, 321321.2]],
                           index=['A', 'B'], columns=['X', 'Y', 'Z'])
            df.to_excel(filename, 'test1', float_format='%.2f')

            reader = ExcelFile(filename)
            rs = reader.parse('test1', index_col=None)
            xp = DataFrame([[0.12, 0.23, 0.57],
                            [12.32, 123123.20, 321321.20]],
                           index=['A', 'B'], columns=['X', 'Y', 'Z'])
            tm.assert_frame_equal(rs, xp)
            os.remove(filename)

    def test_to_excel_styleconverter(self):
        from pandas.io.parsers import CellStyleConverter

        try:
            import xlwt
            import openpyxl
        except ImportError:
            raise nose.SkipTest

        hstyle = {"font": {"bold": True},
              "borders": {"top": "thin",
                        "right": "thin",
                        "bottom": "thin",
                        "left": "thin"},
              "alignment": {"horizontal": "center"}}
        xls_style = CellStyleConverter.to_xls(hstyle)
        self.assertTrue(xls_style.font.bold)
        self.assertEquals(xlwt.Borders.THIN, xls_style.borders.top)
        self.assertEquals(xlwt.Borders.THIN, xls_style.borders.right)
        self.assertEquals(xlwt.Borders.THIN, xls_style.borders.bottom)
        self.assertEquals(xlwt.Borders.THIN, xls_style.borders.left)
        self.assertEquals(xlwt.Alignment.HORZ_CENTER, xls_style.alignment.horz)

        xlsx_style = CellStyleConverter.to_xlsx(hstyle)
        self.assertTrue(xlsx_style.font.bold)
        self.assertEquals(openpyxl.style.Border.BORDER_THIN,
                          xlsx_style.borders.top.border_style)
        self.assertEquals(openpyxl.style.Border.BORDER_THIN,
                          xlsx_style.borders.right.border_style)
        self.assertEquals(openpyxl.style.Border.BORDER_THIN,
                          xlsx_style.borders.bottom.border_style)
        self.assertEquals(openpyxl.style.Border.BORDER_THIN,
                          xlsx_style.borders.left.border_style)
        self.assertEquals(openpyxl.style.Alignment.HORIZONTAL_CENTER,
                          xlsx_style.alignment.horizontal)

    # def test_to_excel_header_styling_xls(self):

    #     import StringIO
    #     s = StringIO.StringIO(
    #     """Date,ticker,type,value
    #     2001-01-01,x,close,12.2
    #     2001-01-01,x,open ,12.1
    #     2001-01-01,y,close,12.2
    #     2001-01-01,y,open ,12.1
    #     2001-02-01,x,close,12.2
    #     2001-02-01,x,open ,12.1
    #     2001-02-01,y,close,12.2
    #     2001-02-01,y,open ,12.1
    #     2001-03-01,x,close,12.2
    #     2001-03-01,x,open ,12.1
    #     2001-03-01,y,close,12.2
    #     2001-03-01,y,open ,12.1""")
    #     df = read_csv(s, parse_dates=["Date"])
    #     pdf = df.pivot_table(values="value", rows=["ticker"],
    #                                          cols=["Date", "type"])

    #     try:
    #         import xlwt
    #         import xlrd
    #     except ImportError:
    #         raise nose.SkipTest

    #     filename = '__tmp_to_excel_header_styling_xls__.xls'
    #     pdf.to_excel(filename, 'test1')


    #     wbk = xlrd.open_workbook(filename,
    #                              formatting_info=True)
    #     self.assertEquals(["test1"], wbk.sheet_names())
    #     ws = wbk.sheet_by_name('test1')
    #     self.assertEquals([(0, 1, 5, 7), (0, 1, 3, 5), (0, 1, 1, 3)],
    #                       ws.merged_cells)
    #     for i in range(0, 2):
    #         for j in range(0, 7):
    #             xfx = ws.cell_xf_index(0, 0)
    #             cell_xf = wbk.xf_list[xfx]
    #             font = wbk.font_list
    #             self.assertEquals(1, font[cell_xf.font_index].bold)
    #             self.assertEquals(1, cell_xf.border.top_line_style)
    #             self.assertEquals(1, cell_xf.border.right_line_style)
    #             self.assertEquals(1, cell_xf.border.bottom_line_style)
    #             self.assertEquals(1, cell_xf.border.left_line_style)
    #             self.assertEquals(2, cell_xf.alignment.hor_align)

    #     os.remove(filename)


    # def test_to_excel_header_styling_xlsx(self):

    #     import StringIO
    #     s = StringIO.StringIO(
    #     """Date,ticker,type,value
    #     2001-01-01,x,close,12.2
    #     2001-01-01,x,open ,12.1
    #     2001-01-01,y,close,12.2
    #     2001-01-01,y,open ,12.1
    #     2001-02-01,x,close,12.2
    #     2001-02-01,x,open ,12.1
    #     2001-02-01,y,close,12.2
    #     2001-02-01,y,open ,12.1
    #     2001-03-01,x,close,12.2
    #     2001-03-01,x,open ,12.1
    #     2001-03-01,y,close,12.2
    #     2001-03-01,y,open ,12.1""")
    #     df = read_csv(s, parse_dates=["Date"])
    #     pdf = df.pivot_table(values="value", rows=["ticker"],
    #                                          cols=["Date", "type"])

    #     try:
    #         import openpyxl
    #         from openpyxl.cell import get_column_letter
    #     except ImportError:
    #         raise nose.SkipTest

    #     if openpyxl.__version__ < '1.6.1':
    #         raise nose.SkipTest

    #     # test xlsx_styling
    #     filename = '__tmp_to_excel_header_styling_xlsx__.xlsx'
    #     pdf.to_excel(filename, 'test1')

    #     wbk = openpyxl.load_workbook(filename)
    #     self.assertEquals(["test1"], wbk.get_sheet_names())
    #     ws = wbk.get_sheet_by_name('test1')

    #     xlsaddrs = ["%s2" % chr(i) for i in range(ord('A'), ord('H'))]
    #     xlsaddrs += ["A%s" % i for i in range(1, 6)]
    #     xlsaddrs += ["B1", "D1", "F1"]
    #     for xlsaddr in xlsaddrs:
    #         cell = ws.cell(xlsaddr)
    #         self.assertTrue(cell.style.font.bold)
    #         self.assertEquals(openpyxl.style.Border.BORDER_THIN,
    #                           cell.style.borders.top.border_style)
    #         self.assertEquals(openpyxl.style.Border.BORDER_THIN,
    #                           cell.style.borders.right.border_style)
    #         self.assertEquals(openpyxl.style.Border.BORDER_THIN,
    #                           cell.style.borders.bottom.border_style)
    #         self.assertEquals(openpyxl.style.Border.BORDER_THIN,
    #                           cell.style.borders.left.border_style)
    #         self.assertEquals(openpyxl.style.Alignment.HORIZONTAL_CENTER,
    #                           cell.style.alignment.horizontal)

    #     mergedcells_addrs = ["C1", "E1", "G1"]
    #     for maddr in mergedcells_addrs:
    #         self.assertTrue(ws.cell(maddr).merged)

    #     os.remove(filename)

    def test_excel_010_hemstring(self):
        try:
            import xlwt
            import openpyxl
        except ImportError:
            raise nose.SkipTest

        from pandas.util.testing import makeCustomDataframe as mkdf
        # ensure limited functionality in 0.10
        # override of #2370 until sorted out in 0.11
        def roundtrip(df,header=True,parser_hdr=0):
             path = '__tmp__test_xl_010_%s__.xls' % np.random.randint(1,10000)
             df.to_excel(path,header=header)
             xf = pd.ExcelFile(path)
             try:
                 res = xf.parse(xf.sheet_names[0],header=parser_hdr)
                 return res
             finally:
                 os.remove(path)

        nrows = 5
        ncols = 3

        for i in range(1,4): # row multindex upto nlevel=3
            for j in range(1,4): # col ""
                df = mkdf(nrows,ncols,r_idx_nlevels=i,c_idx_nlevels=j)
                res = roundtrip(df)
                # shape
                self.assertEqual(res.shape,(nrows,ncols+i))

                # no nans
                for r in range(len(res.index)):
                    for c in range(len(res.columns)):
                        self.assertTrue(res.ix[r,c] is not np.nan)

        for i in range(1,4): # row multindex upto nlevel=3
            for j in range(1,4): # col ""
                df = mkdf(nrows,ncols,r_idx_nlevels=i,c_idx_nlevels=j)
                res = roundtrip(df,False)
                # shape
                self.assertEqual(res.shape,(nrows-1,ncols+i)) # first row taken as columns

                # no nans
                for r in range(len(res.index)):
                    for c in range(len(res.columns)):
                        self.assertTrue(res.ix[r,c] is not np.nan)

        res = roundtrip(DataFrame([0]))
        self.assertEqual(res.shape,(1,1))
        self.assertTrue(res.ix[0,0] is not np.nan)

        res = roundtrip(DataFrame([0]),False,None)
        self.assertEqual(res.shape,(1,2))
        self.assertTrue(res.ix[0,0] is not np.nan)

if __name__ == '__main__':
    nose.runmodule(argv=[__file__,'-vvs','-x','--pdb', '--pdb-failure'],
                   exit=False)
