05-14-2019
Hi Circuits...
In a short word, DON'T!
Python 2.x.x and 3.x.x are worlds apart.
If your install uses Python 3.x.x then leave well alone as it could well be used by the OS for other things during bootup and the like.
There is nothing to stop you using Python 2.x.x but expect significant differences between the two.
One simple major difference is Python 2.x.x uses print as a statement/command whereas Python 3.x.x has print() as a function.
Another important one is raw inputting is raw_input() in Python 2.x.x and just input() in Python 3.x.x.
Python 2.x.x input() is NOT the same as Python 3.x.x input() .
There are numerous more differences that you should recode anything you write to suit version 3.x.x as 2.x.x is not being supported after around 2020.
So to reiterate DON'T make python2 your default OR vice-versa!
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PYDOC2.7(1) General Commands Manual PYDOC2.7(1)
NAME
pydoc2.7 - the Python documentation tool
SYNOPSIS
pydoc2.7 name
pydoc2.7 -k keyword
pydoc2.7 -p port
pydoc2.7 -g
pydoc2.7 -w module [...]
DESCRIPTION
pydoc2.7 name Show text documentation on something. name may be the name of a Python keyword, topic, function, module, or package, or a
dotted reference to a class or function within a module or module in a package. If name contains a '/', it is used as the path to a Python
source file to document. If name is 'keywords', 'topics', or 'modules', a listing of these things is displayed.
pydoc2.7 -k keyword Search for a keyword in the synopsis lines of all available modules.
pydoc2.7 -p port Start an HTTP server on the given port on the local machine.
pydoc2.7 -g Pop up a graphical interface for finding and serving documentation.
pydoc2.7 -w name [...] Write out the HTML documentation for a module to a file in the current directory. If name contains a '/', it is
treated as a filename; if it names a directory, documentation is written for all the contents.
AUTHOR
Moshe Zadka, based on "pydoc --help"
PYDOC2.7(1)