O'Reilly Introduction to Python/Section 1/Linux set up Python
In this section, we are going to check which version of Python is installed, and possibly install a newer version.
Check your Python installation
- Start up a Terminal. You can find the Terminal application at Applications/Accessories/Terminal, or it may already be on your menu bar.
This Terminal is another way of navigating your computer and running programs -- just textually instead of graphically. We are going to be running Python and Python scripts from this Terminal.
- Test your Python installation at the Terminal prompt by typing
and pressing Enter. You should see something like
Python 3.4.1 (v3.4.1:d047928ae3f6, May 13 2013, 12:45:22) [GCC 4.3.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>>
You just started Python! The
- Exit the Python prompt by typing
exit()and pressing Enter. This will take you back to the Linux Terminal prompt.
>>>indicates that you are at a new type of prompt -- a Python prompt. The Terminal prompt lets you navigate your computer and run programs, and the Python prompt lets you write and run Python code interactively.
If your Python version started with a 3, you are done with this section; please « return to the Section 1 main page
If your Python version started with a 2, you may have a version of Python 3 installed, just not as the default Python. Type
at a Terminal prompt.
If this starts Python, you have a version of Python 3 installed, just not as the default Python. Please use the command python3 instead of python to start Python for the rest of this course.
If you have no version of Python 3 installed, we'll need to install it. Please continue to the instructions in the next section.
Please install Python 3.4 using your package manager, or from source using the source release here.
Please use the command python3 instead of python to start Python for the rest of this course.
You have tested your Python installation.