Python module not found

How do I import pyBarcode from the Python interpreter? According to the pyBarcode documentation the first step is to import barcode. When I try that it says there is no such module.

~# python
Python 2.6.6开发者_高级运维 (r266:84292, Dec 26 2010, 22:31:48)
[GCC 4.4.5] on linux2

>>> import barcode
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named barcode

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Before using (importing) pyBarcode, you must install it, for instance with

pip install pyBarcode

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Make sure that the directory that contains the module is in your PYTHONPATH environment variable.

Alternatively, you can use

import sys
sys.path.append(r"C:\path to pyBarcode")
import barcode