在Linux red hat 4.4上安装ipython 0.10.0的错误

Question

我正在尝试在Linux Red Hat 4.4.4-17上安装ipython 0.10.0。

我使用说明：http://ipython.org/ipython-doc/stable/install/install.html

$ tar -xzf ipython.tar.gz
$ cd ipython
$ python setup.py install 

但是，我得到了：

import pkg_resources
    Zope.Interface: yes
           Twisted: Not found (required for parallel computing
                    capabilities)
          Foolscap: Not found (required for parallel computing
                    capabilities)
           OpenSSL: 0.10
            sphinx: Not found (required for building documentation)
          pygments: Not found (required for syntax highlighting
                    documentation)
              nose: Not found (required for running the test suite)
           pexpect: no (required for running standalone doctests)

running install
running build
running build_py
running build_scripts
running install_lib
running install_scripts

changing mode of /home/user/usr/bin/ipengine to 755
changing mode of /home/user/usr/bin/ipcontroller to 755
changing mode of /home/user/usr/bin/ipcluster to 755
changing mode of /home/user/usr/bin/ipython to 755
changing mode of /home/user/usr/bin/ipythonx to 755
changing mode of /home/user/usr/bin/ipython-wx to 755
changing mode of /home/user/usr/bin/pycolor to 755
changing mode of /home/user/usr/bin/irunner to 755
changing mode of /home/user/usr/bin/iptest to 755

running install_data
running install_egg_info

Removing /home/user/usr/lib/python2.6/site-packages/ipython-0.10.1-py2.6.egg-info
Writing /home/user/usr/lib/python2.6/site-packages/ipython-0.10.1-py2.6.egg-info

我使用easy_install来安装鼻子，狮身人面像，pexpect，pygments。

为什么我仍然有这个错误？

另一个错误：

$ ipython
Traceback (most recent call last):
  File "/home/user/usr/bin/ipython", line 26, in <module>
    import IPython.Shell
ImportError: No module named Shell

由于