More often than not, you will find yourself in a situation where you have to upgrade a package because either the new version is required by a dependency or it has additional features that you would like to use. First, check the version of the library you have installed by glancing at the __version__ attribute, as shown in the following example, numpy:
>>> import numpy>>> numpy.__version__ # 2 underscores before and after '1.11.0'
Now, if you want to update it to a newer release, say the 1.12.1 version, you can run the following command from the command line:
$> pip install -U numpy==1.12.1
Alternatively, you can use the following command:
$> easy_install --upgrade numpy==1.12.1
Finally, if you're interested in upgrading ...