Traté de instalar elopenpyxl módulo, pero durante la instalación mostró algunos errores conJDcall. Cuando trato de importarlo, aparece este error:

 Traceback (most recent call last):
  File "C:\Andrzej\workspace\sandbox\sandbox.py", line 7, in <module>
    import openpyxl 

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\__init__.py", line 29, in <module>
    from openpyxl.workbook import Workbook

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\workbook\__init__.py", line 25, in <module>
    from .workbook import *

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\workbook\workbook.py", line 35, in <module>
    from openpyxl.worksheet import Worksheet

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\worksheet\__init__.py", line 25, in <module>
    from .worksheet import *

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\worksheet\worksheet.py", line 35, in <module>
    import openpyxl.cell

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\cell\__init__.py", line 25, in <module>
    from .cell import *

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\cell\cell.py", line 47, in <module>
    from openpyxl.date_time import (

  File "C:\Python34\lib\site-packages\openpyxl-2.0.5-py3.4.egg\openpyxl\date_time.py", line 34, in <module>
    from jdcal import (

ImportError: No module named 'jdcal'

Tengo el mismo problema para Python 3.4 y 3.3, ¿cómo puedo resolverlo?