Action
This document will give you a quick overview of installing custom packages into python. There are two primary ways to do so, one is with pip install --user and the other is virtualenv; both have advantages and disadvantages.
Instructions
Using virtualenv
Here are the examples using virtualenv, the benefit here is that in a shared space many users could collaborate on one custom instances of packages for their group if the venv is created inside a lab share.
Python 2.7
Here we see that numpy is not installed.
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1031 > /network/rit/misc/software/python2/bin/python2.7 Python 2.7.12 (default, Aug 10 2016, 15:38:28) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named numpy >>>
Here we will use virtualenv to setup a virtual python installation and activate it.
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1032 > virtualenv venv New python executable in /network/rit/home/ew2193/python_project/venv/bin/python Installing setuptools, pip, wheel...done. ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1033 > source venv/bin/activate (venv)
Once activated we can use the standard tools like pip to install additional standard libraries.
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951
1034 > pip install numpy
Collecting numpy
Downloading numpy-1.11.1-cp27-cp27m-manylinux1_x86_64.whl (15.3MB)
100% |████████████████████████████████| 15.3MB 59kB/s
Installing collected packages: numpy
Successfully installed numpy-1.11.1
(venv)
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951
1035 > python
Python 2.7.12 (default, Aug 10 2016, 15:38:28)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> help(numpy)
Help on package numpy:
NAME
numpy
FILE
/network/rit/home/ew2193/python_project/venv/lib/python2.7/site-packages/numpy/__init__.py
DESCRIPTION
NumPy
=====
If we deactivate we are back to the system level python and stock packages.
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1036 > deactivate ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1037 > python Python 2.7.5 (default, Nov 21 2015, 00:39:04) [GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named numpy >>>
Python 3
Here is the same set of commands using python3 rather than python2. You will notice only slight changes from the python2 version.
ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1039 > /network/rit/misc/software/python3/bin/virtualenv venv Using base prefix '/network/rit/misc/software/python3' New python executable in /network/rit/home/ew2193/python_project/venv/bin/python3.5 Also creating executable in /network/rit/home/ew2193/python_project/venv/bin/python Installing setuptools, pip, wheel...done. ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1040 > /network/rit/misc/software/python3/bin/python3 Python 3.5.2 (default, Aug 10 2016, 14:35:13) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named 'numpy' >>> ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1041 > source venv/bin/activate (venv) ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1042 > pip3 install numpy Collecting numpy Using cached numpy-1.11.1-cp35-cp35m-manylinux1_x86_64.whl Installing collected packages: numpy Successfully installed numpy-1.11.1 (venv) ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1043 > python3 Python 3.5.2 (default, Aug 10 2016, 14:35:13) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import numpy >>> (venv) ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1045 > deactivate ew2193@headnode7.rit.albany.edu:~/python_project 2.08 1.66 1.00 3/201 5951 1046 > python3 Python 3.5.2 (default, Aug 10 2016, 14:35:13) [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named 'numpy' >>>