1 2Download & Install 3================== 4 5The *pyasn1* library is a pure-Python package with no external 6dependencies. Considering how much industrial or finance software 7can be stuck with an old platform (think RHEL 5), we struggle to 8maintain its compatibility back to the very pre-historic Python 9(which is 2.4!). 10 11The best way to obtain PyASN1 is by running `pip`: 12 13.. code-block:: bash 14 15 $ virtualenv venv 16 $ source venv/bin/activate 17 $ pip install pyasn1 18 19You may also want to use `pyasn1-modules`: 20 21.. code-block:: bash 22 23 $ pip install pyasn1-modules 24 25Alternatively, you can download the latest release from 26`GitHub <https://github.com/etingof/pyasn1/releases>`_ 27or `PyPI <https://pypi.org/project/pyasn1>`_. 28