Install Python 3 locally under /home directory without root or sudo permission!

• Download the tarball of the stable release of Python 3 from its archive https://www.python.org/ftp/python/

cd /home

curl -O https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tgz

• Uncompress the tarball using tar

tar -xzvf Python-3.7.2.tgz

• Change directory to Python-3-7-2

cd Python-3.7.2

• Run configure file

./configure

• Create directory you want to install Python 3. For example, under my home

mkdir -p $HOME/usr/local

• Install Python 3

make altinstall prefix=$HOME/usr/local exec-prefix=$HOME/usr/local

wait for install 5 minutes or so. Python 3 will be installed in $HOME/usr/local/bin.

ls $HOME/usr/local/bin

2to3-3.7  easy_install-3.7  idle3.7  pip3.7  pydoc3.7  python3  python3.7  python3.7m  python3.7m-config  pyvenv-3.7

• Now you can use Python 3.

/home/jsyu/usr/local/bin/python3.7

Then, Python 3 shell starts.

Python 3.7.2 (default, Jan 28 2019, 13:06:35)

[GCC 6.4.0] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>> 

>>> 

To exit, just type

exit()

Change directory to /where/you/install/python3/bin directory again.

cd $HOME/usr/local/bin

Create your own Python 3 virtual environment file

ln -s pyvenv-3.7 pyvenv 

Edit pyvenv-3.7 using vi (or other text editor)

vi pyvenv-3.7

At the first line of file, edit the absolute path of your python. So the correct path should be like this

#!/home/rangsiman/usr/local/bin/python3.7

To make life easier, we do not always want to call Python 3 via its full path. So we can add it to PATH environment variable.

• Change directory to where Python 3 installed.

cd $HOME/usr/local/bin

• Create a link

ln -s python3.7 python3

• Add Python 3.7.2 executable to your $PATH.

echo "# Python 3.7.2" >> ~/.bashrc

echo "export PATH=\$HOME/usr/local/bin:\$PATH" >> ~/.bashrc

• Activate .bashrc

source ~/.bashrc 

• Now you can run Python 3 anywhere.

python3

Rangsiman Ketkaew