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在过去的几天里，我一直在从 Head First Python 学习 Python。

我已经到了必须构建我制作的模块的分发包的地步，称为nester，并将其安装在我的系统上。安装模块后，我必须将其导入脚本并使用导入模块中的函数。

尝试从保存原始nester.py 的文件夹以外的任何文件夹导入模块时，出现以下错误（这表明模块未正确安装）：

james@james-Inspiron-1764:~$ python3.3
Python 3.3.0 (default, Sep 29 2012, 17:14:58) 
[GCC 4.7.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import nester
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'nester'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 4, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
    import apport.fileutils
  File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 20, in <module>
    import apt
  File "/usr/lib/python3/dist-packages/apt/__init__.py", line 21, in <module>
    import apt_pkg
ImportError: No module named 'apt_pkg'

Original exception was:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'nester'
>>>

这就是我构建和安装模块的方式：

james@james-Inspiron-1764:~/python/headfirst/chapter2/nester$ python3.3 setup.py sdist
/usr/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'pymodules'
  warnings.warn(msg)
running sdist
running check
warning: sdist: manifest template 'MANIFEST.in' does not exist (using default file list)

warning: sdist: standard file not found: should have one of README, README.txt

writing manifest file 'MANIFEST'
creating nester_jc-1.4.0
making hard links in nester_jc-1.4.0...
hard linking setup.py -> nester_jc-1.4.0
Creating tar archive
removing 'nester_jc-1.4.0' (and everything under it)
james@james-Inspiron-1764:~/python/headfirst/chapter2/nester$ sudo python3.3 setup.py install
[sudo] password for james: 
/usr/lib/python3.3/distutils/dist.py:257: UserWarning: Unknown distribution option: 'pymodules'
  warnings.warn(msg)
running install
running build
running install_egg_info
Removing /usr/local/lib/python3.3/dist-packages/nester_jc-1.4.0.egg-info
Writing /usr/local/lib/python3.3/dist-packages/nester_jc-1.4.0.egg-info

如果从 ~/python/headfirst/chapter2/nester 内部启动 python，我可以成功导入 nester，但如果我从任何其他位置开始，则不能。这是我安装模块的方式有问题，还是我的 python 安装有问题？

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