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How to install Dolfin Package (which is generally used when you are using FEniCS)?

ph flag

To solve Partial Differential Equations, I installed FEniCS on a virtual environment. To use FEniCS, I have to use the Dolfin Library and I wish to know, how to install this library. I tried the following options but didn't get through:

1. pip install dolfin
ERROR: Could not find a version that satisfies the requirement dolfin (from versions: none)
ERROR: No matching distribution found for dolfin

2. sudo apt-get install dolfin
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package dolfin

I am new to using Ubuntu and installing packages, it would be great if someone could help me out getting rid of this (in a Jupyter Notebook):

import dolfin
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-17-c13f418a68dc> in <module>
----> 1 import dolfin

ModuleNotFoundError: No module named 'dolfin'
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