pkg_resources.DistributionNotFound: Flask==0.10.1

现象：
装完新版mrq运行示例又报错：

[root@web4 test-mrq]# mrq-run tasks.Fetch url http://www.google.com
Traceback (most recent call last):
  File "/bin/mrq-run", line 5, in 
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 3011, in 
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 626, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: Flask==0.10.1

解决方法：
yum install python-flask

继续报错：

[root@web4 test-mrq]# mrq-run tasks.Fetch url http://www.google.com
Traceback (most recent call last):
  File "/bin/mrq-run", line 5, in 
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 3011, in 
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 626, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: subprocess32==3.2.5