如何通过openerp_sxw2rml.py将SXW文件转换为RML文件？

我正在尝试使用openerp_sxw2rml.py将SXW文件转换为RML文件,但是它提供了太多错误并且它正在生成一个空的RML文件.我确信SXW的??内容是正确的,因为我使用的是OpenERP模块中的现有SXW文件,以检查它们是否以正确的方式进行转换.

例如,我从帐户模块复制了account_balance.sxw,并将其粘贴到openerp_sxw2rml文件夹中进行测试.然后我执行了这个：

sudo ./openerp_sxw2rml.py /opt/openerp7/addons/base_report_designer/openerp_sxw2rml/account_balance.sxw > /opt/openerp7/addons/base_report_designer/openerp_sxw2rml/account_balance.rml

结果是下一个：

./openerp_sxw2rml.py: 30: ./openerp_sxw2rml.py: 
OpenERP SXW2RML - The OpenERP's report engine

OpenERP SXW2RML is part of the OpenERP Report Project.
OpenERP Report is a module that allows you to render high quality PDF document
from an OpenOffice template (.sxw) and any relationl database.
: not found
./openerp_sxw2rml.py: 31: ./openerp_sxw2rml.py: __version__: not found
./openerp_sxw2rml.py: 34: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 35: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 36: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 37: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 38: ./openerp_sxw2rml.py: import: not found
from: can't read /var/mail/reportlab.lib.units
./openerp_sxw2rml.py: 40: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 41: ./openerp_sxw2rml.py: import: not found
./openerp_sxw2rml.py: 43: ./openerp_sxw2rml.py: class: not found
./openerp_sxw2rml.py: 44: ./openerp_sxw2rml.py: General DOM API utilities.: not found
./openerp_sxw2rml.py: 45: ./openerp_sxw2rml.py: Syntax error: "(" unexpected

为什么会这样？有没有人有同样的问题？

任何帮助,将不胜感激！

sudo python openerp_sxw2rml.py /opt/openerp7/addons/base_report_designer/openerp_sxw2rml/account_balance.sxw > /opt/openerp7/addons/base_report_designer/openerp_sxw2rml/account_balance.rml