How to find out if I have installed a Python module in Linux?

Question

I tried to install a Python module by typing: sudo python setup.py install After I typed this command I got a lot of output to the screen. The lest few lines are bellow:

writing manifest file 'scikits.audiolab.egg-info/SOURCES.txt'
removing '/usr/lib/python2.5/site-packages/scikits.audiolab-0.10.2-py2.5.egg-info' (and everything under it)
Copying scikits.audiolab.egg-info to /usr/lib/python2.5/site-packages/scikits.audiolab-0.10.2-py2.5.egg-info
Installing /usr/lib/python2.5/site-packages/scikits.audiolab-0.10.2-py2.5-nspkg.pth
running install_scripts

So, there were nothing suspicious. But when I tried to use the module from the Python:

import pyaudiolab

I see that Python does not find the module:

Traceback (most recent call last):  
File "test.py", line 1, in <module>
    import pyaudiolab ImportError: No module named pyaudiolab

How can I found out what went wrong? As a result of the installation I get a new directory: /usr/lib/python2.5/site-packages (so something happened) but I still cannot use the module. Can anybody help me with that?

Answer 1

您是否尝试import scikits.audiolab或import audiolab ？

Answer 2

From the OP's comment to an answer, it's clear that scikits.audiolab is indeed where this module's been installed, but it also needs you to install numpy . Assuming the module's configuration files are correct, by using easy_install instead of the usual python setup.py run, you might have automatically gotten and installed such extra dependencies -- that's one of the main points of easy_install after all. But you can also do it "manually" (for better control of where you get dependencies from and exactly how you install them), of course -- however, in that case, you do need to check and manually install the dependencies, too.

Answer 3

Your library depends upon numoy. Try installing numpy:

sudo apt-get install python-numpy

Answer 4

您需要一个最新版本的numpy（> = 1.2.0），如在audiolab安装信息上所示。

Answer 5

• check if you have the module somewhere inside: /usr/lib/python2.5/site-packages/ (search for a file named |modulename|.py so in your example - try: pyaudiolab.py or audiolab.py)

• if it exists - check if the directory in which it exists is found in the sys.path variable:

  import sys

  sys.path