pip version in Ubuntu is different

Question

I meet a issue about pip version in Ubuntu is different as the following:

This is my virtual machine - Ubuntu 12.04.5 LTS (GNU/Linux 3.11.0-15-generic x86_64)

The pip version is 6.0.8 (6.XX):

Another virtual machine is Ubuntu 14.04.3 LTS. It's downloaded form Ubuntu desktop .

The pip version is 1.5.4 (1.XX):

They are in same operation system. Why are they different?

Answer 1

Each version of Ubuntu generally comes with packages with different versions. Applications release new and improved versions of their software, and it's only natural for Ubuntu to include a more recent stable version of it.

Answer 2

For Ubuntu 14.04.3 LTS, the version seems right:

• http://packages.ubuntu.com/trusty/python/python-pip

For Ubuntu 12.04.5 LTS, I am not sure why the version shows as 6.1.1 , when it should be:

• http://packages.ubuntu.com/precise/python/python-pip

I suspect somebody updated pip on the second machine at some point.