Merge pull request #2 from stanfordpython/2021_revisions

Revise install handouts for 2021 course offering

Author: cooper-mj

installing-python-linux.md

@@ -10,25 +10,17 @@ In this course, you'll be writing lots of Python code, so it's important to get
 
 Throughout this document, we will:
 
-1. Install Python 3.8.0
+1. Install Python 3.9.2
 2. Create a virtual environment using this version of Python.
 3. Inside this environment, install useful packages.
 
-This approach works well and is straightforward to set up, but has its drawbacks. For those who feel more comfortable with the command line, we also provide instructions for a better solution involving a tool named `virtualenvwrapper`. In this portion, we will
-
-1. Reset our environment to the default state.
-2. Use Python 3.8.0's `pip` to install `virtualenvwrapper`
-3. Use `virtualenvwrapper` to create a managed virtual environment.
-4. Inside this environment, install useful packages.
-5. Modify the shell startup script to activate this virtual environment.
-
 Let's get started!
 
 ## Prerequisite
 
 We assume that you have a basic familiarity with the command line. We understand that not everyone will feel comfortable with the command line, because it is covered starting in CS107. However, I highly recommend using Nick Troccoli's amazing [CS107 resources](https://web.stanford.edu/class/archive/cs/cs107/cs107.1194/resources/) for this quarter if you feel less experienced, particular the section titled "Common Unix Commands."
 
-## Install Python 3.8.0
+## Install Python 3.9.2
 
 On different Linux systems, there are a couple of different ways to install and manage packages. We'll cover `apt-get` here, as well as how you can install from source.
 
@@ -39,25 +31,25 @@ On different Linux systems, there are a couple of different ways to install and
 ```
 $ sudo add-apt-repository ppa:deadsnakes/ppa
 $ sudo apt-get update
-$ sudo apt-get install python3.8
-$ sudo apt-get install python3.8-venv
+$ sudo apt-get install python3.9
+$ sudo apt-get install python3.9-venv
 ```
 
-On Debian, we'll just have to `sudo apt-get install python3` and hope for the best. Also note that this might install a different version of Python 3.8, but we won't worry about that here.
+On Debian, we'll just have to `sudo apt-get install python3` and hope for the best. Also note that this might install a different version of Python 3.9, but we won't worry about that here.
 
 ### Installing with `yum` (RedHat, CentOS)
 
 Other Linux distributions use a different package manager, `yum`. We don't have any test devices with these Linux distributions, so you're on your own here. There is a reasonably good tutorial for CentOS [here](https://www.digitalocean.com/community/tutorials/how-to-install-python-3-and-set-up-a-local-programming-environment-on-centos-7).
 
 ### Other Linux package managers
 
-The world of Linux distributions is unfathomably large. If you can pull off a Python 3.8 install on your distribution of choice, more power to you. However, we recommend building from source.
+The world of Linux distributions is unfathomably large. If you can pull off a Python 3.9 install on your distribution of choice, more power to you. However, we recommend building from source.
 
 ### Installing from source
 
 Installing Python from source follows the same pattern as most other source installations.
 
-First, download the source tarball (either [gzipped](https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz) or [XZ compressed](https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tar.xz)). Unzip the files and `cd` into the unzipped directory.
+First, download the source tarball (either [gzipped](https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tgz) or [XZ compressed](https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tar.xz)). Unzip the files and `cd` into the unzipped directory.
 
 To build Python, just execute the usual commands:
 
@@ -76,11 +68,5 @@ More information on the actual installation process can be found in the tarball'
 
 From here, the instructions are almost exactly the same as the [macOS](https://github.com/stanfordpython/python-handouts/blob/master/installing-python-macos.md) instructions. Follow those instructions, with the following differences.
 
-### Finding `virtualenvwrapper.sh`
-
-If you choose to use `virtualenvwrapper`, it will be installed in a platform-specific location. You will need to find this file. You can use the `find` command described in the linked document to search your computer for the downloaded file.
-
-If other unexpected differences come up between those instructions and your operating system, please let us know on Piazza so that we can update these instructions with distribution-specific dependencies.
-
 ## Credit
 Much of this handout was based on a similar handout written by Sam Redmond (@samredmond)