#Default python 3 install install
#Default python 3 install archive
#Default python 3 install code

On success, you are going to receive a Python 3.9.1 interactive shell. Launch the console and type the following command: $ python3.9 Output: /usr/local/bin/python3.9 Check version of Python To find the location of Python 3.9.1, type: which python3 ie Make altinstall protect from replacing the default python installed in /usr/bin/python. Now if we check in the terminal by just running the python command it would result in the following: The interpreter of python 3 was launched, rather than an interpreter of python2.

#Default python 3 install install

Here my computer has 4 core CPU.ДЇinally to install binaries, run: $ sudo make altinstall The make altinstall command is recommended over make install because it does not overwrite the python3 binary. However, we can set python3 as default by firing two commands on terminal. Aliasing is a must since the Python binary stored in /usr/bin/ cant be changed. If we use the package installation, a python3 fill will be available in /usr/local/bin/. The good thing with choosing to install Python in this particular directory is that no administrator rights are needed in order to install the software. If a user chooses not to customize the installation directory, Python gets installed in the AppData directory by default. Note: You can specify the number of processor units or cores using -j option. Pythons website has a macOS Python 3 installer we can download and use. Install Python in the UserвЂ™s AppData Directory. Now, to compile and build Python 3.9.1 - which will take some time to complete, run: $ sudo make -j 4 Note: The above command makes the build process slower but advised to run it. Run the configure command with -enable-optimizations, which gives better performance in executing python code. Then change the current directory to Python3.9.1 $ cd Python-3.9.1

#Default python 3 install archive

Unpack the archive with the help of the command shown below.

#Default python 3 install code

Now, download latest source code of the Python using wget utility: $ sudo wget To install prerequisites dependencies, type: $ sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev python3 is a symlink to 3.5 To set python 3.5 as default use the update-alternat. Check with versions are already installed In my example Python 2.7 and 3.5 are installed. The update-alternatives scripts allows to change this. usr/bin/python is in fact a symlink to the current default versions binary. To download package information from all configured sources, type: $ sudo apt-get updateД«efore proceeding with the installation of Python 3.9.1 from source, it is a must that you install the required libraries. Hi, debian is still delivered with 2.7 as the default version of python.

The other way is to compile and install python 3.9.1 directly from the source. The execution of the above command produces the following output on console: /usr/bin/python3 Install Python 3.9.1 on Ubuntu 20.04 from Source The following command can help to identify the proper install location of Python: $ which python3 Now install python 3.9 using apt command: $ sudo apt-get install python3.9 $ sudo add-apt-repository ppa:deadsnakes/ppa