Pandas - 导出数据帧的 header 和索引到 Excel 会导致类型错误

Pandas - Export of dataframe's header and index to Excel causes TypeError

我正在使用 pandas 0.15openpyxl 2.2.0 作为编写器引擎,但 pandas 0.16 也会出现同样的问题。

我需要将 pandas 数据框导出到 .xlsx 文件。数据框非常简单——类似于:

   col_A  col_B col_C
0      1    100    AB
1      2    200    AC
2      3    300    AD

我可以导出数据框的内容(即没有索引标签和列名):

df.to_excel(path_to_xlsx_file, sheet_name, header=False, index=False)

但是,如果我包含索引标签或列名(或两者),我会收到 TypeError。这个:

df.to_excel(path_to_xlsx_file, sheet_name, header=False, index=True)

或者这个:

 df.to_excel(path_to_xlsx_file, sheet_name, header=True, index=False)

导致这个:

    Traceback (most recent call last):

  File "<ipython-input-11-a60810c2c9c2>", line 1, in <module>
    runfile('F:/mine/python/pandas_tests.py', wdir='F:/mine/python')

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 601, in runfile
    execfile(filename, namespace)

  File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 66, in execfile
    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "F:/mine/python/pandas_tests.py", line 25, in <module>
    df.to_excel(path_to_xlsx_file, sheet_name, header=True, index=False)

  File "C:\Python27\lib\site-packages\pandas\util\decorators.py", line 88, in wrapper
    return func(*args, **kwargs)

  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 1260, in to_excel
    startrow=startrow, startcol=startcol)

  File "C:\Python27\lib\site-packages\pandas\io\excel.py", line 705, in write_cells
    xcell.style = xcell.style.copy(**style_kwargs)

  File "C:\Python27\lib\site-packages\openpyxl-2.2.0-py2.7.egg\openpyxl\styles\styleable.py", line 107, in style
    protection=self.protection

  File "C:\Python27\lib\site-packages\openpyxl-2.2.0-py2.7.egg\openpyxl\styles\__init__.py", line 42, in __init__
    self._font = font

  File "C:\Python27\lib\site-packages\openpyxl-2.2.0-py2.7.egg\openpyxl\descriptors\base.py", line 35, in __set__
    raise TypeError('expected ' + str(self.expected_type))

TypeError: expected <class 'openpyxl.styles.fonts.Font'>

我不能使用 xlsxwriter,因为必须将数据框导出到现有文件。

解决方法是使用openpyxl版本2.1.3或2.1.5。