我正在按照 edx 教程运行 devstack(来自http://edx-installing-configuring-and-running.readthedocs.org/en/latest/devstack/run_devstack.html#default-accounts-on-devstack)我得到一个运行命令“paver lms”时出错。
错误如下:
edxapp@precise64:~/edx-platform$ paver devstack lms
---> pavelib.servers.devstack
---> pavelib.prereqs.install_prereqs
---> pavelib.assets.update_assets
---> pavelib.prereqs.install_ruby_prereqs
---> pavelib.prereqs.install_node_prereqs
python manage.py lms --settings=devstack preprocess_assets
Traceback (most recent call last):
File "manage.py", line 15, in <module>
from safe_lxml import defuse_xml_libs
ImportError: No module named safe_lxml
Captured Task Output:
---------------------
---> pavelib.servers.devstack
---> pavelib.prereqs.install_prereqs
---> pavelib.assets.update_assets
---> pavelib.prereqs.install_ruby_prereqs
---> pavelib.prereqs.install_node_prereqs
python manage.py lms --settings=devstack preprocess_assets
Build failed running pavelib.servers.devstack: Subprocess return code: 1
请指导我运行命令需要做什么。