Python executable with the highest priority will be used as default python version. We will set priority of each version using update-alternatives. To switch between python version over the all users, we can use update-alternatives command. And if we run the program.py file using ‘python program.py’, then it will be run by python3.5 executable. Now if we use check python version using ‘python -V’, it will return 3.5.2. Open the bashrc file by using the following command: nano ~/.bashrcĪdd the following line to the below of the bashrc file. But it will only work for the current user. We can create an alias within user’s home directory and add it to the bashrc. But if we want 3.5 as the result of ‘python -V’ and the program will be run by python 3.5 executable, then we can change the default python executable in two ways. If we check python version by ‘python -V’, it will return 2.7.12. Normally if we run a program called program.py by ‘python program.py’, then this program will be run by python2.7. If we have multiple python versions installed in our system, then python will use only one executable.
INSTALL PYTHON 3.5 UBUNTU HOW TO
How to switch between different python version? Normally installation path will be /usr/bin/python3.8. Now if you run the python -V command, you will get the 3.8.1 as output.
INSTALL PYTHON 3.5 UBUNTU INSTALL
Run the following commands: sudo add-apt-repository ppa:deadsnakes/ppa sudo apt update sudo apt install python3.8 Normally installation path will be /usr/bin/python3.7. Now if you run the python -V command, you will get the 3.7.6 as output. Run the following commands: sudo add-apt-repository ppa:deadsnakes/ppa sudo apt update sudo apt install python3.7 Normally installation path will be /usr/bin/python3.6. Now if you run the python -V command, you will get the 3.6.10 as output. Run the following commands: sudo add-apt-repository ppa:deadsnakes/ppa sudo apt update sudo apt install python3.6 Normally installation path will be /usr/bin/python3.5. Now if you run the python -V command, you will get the 3.5.2 as output. Run the following command: sudo apt install python3 Normally installation path will be /usr/bin/python. Now if you run the python -V command, you will get the 2.7.12 as output. Run the following command: sudo apt install python-minimal How to install different versions of python? python 2.7: Here I will keep the notes of installing python of different versions and chan-ging the version on per use. Though I know which command will work on that case but during that parti- cular time I just forgot the exact commands and I have to search on google or stackoverflow for the exact commands. When I work with python, sometimes I face some issues with python versions. You should be able to get (MYENV) as prefix in the terminal command line.How to install and switch between different python versions in ubuntu 16.04. Step-5: Activate the virtualenv $ source MYENV/bin/activate Step-4: set the path of virtualenv to the created(desired) directory- $ sudo virtualenv -p python3 MYENV It will create a folder in the current directory with the name 'MYENV' Lets first create a desired directory- $ mkdir MYENV Step-3: Now set the path of virtualenv to your desired directory. Step-2: Now install 'virtualenv'- $ pip install virtualenv
Step-1: First install python3 - $ sudo apt-get update This is a module inside python which facilitates us to use multiple python versions on the same system. So, to use the latest version of python, it would be better to go for creating a virtual environment ('virtualenv'). It is recommended that we don't try to modify/uninstall this default package of python because there could be many other system files/applications depending on it, and it might create some unexpected errors or issues if we uninstall this default python package. To check the default python version, run below line $ python -V As you must have already noticed that Ubuntu 16.04 has 'python 2.7.12' by default.
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