feat: add python installer

python/README.md

@@ -0,0 +1,109 @@
+---
+title: Python 3 (via pyenv)
+homepage: https://webinstall.dev/pyenv
+tagline: |
+  Python is an easy-to-learn, introductory programming language.
+---
+
+To update or switch versions, run `pyenv install -v 3` (or `3.10`, etc).
+
+### How to Install python3 on macOS
+
+Make sure that you already have Xcode tools installed:
+
+```bash
+xcode-select --install
+```
+
+You may also need to install Xcode proper from the App Store.
+
+### How to Install python3 on Linux
+
+Make sure that you already have the necessary build tools installed:
+
+```bash
+# required
+sudo apt update
+sudo apt install -y build-essential zlib1g-dev libssl-dev
+
+# recommended
+sudo apt install -y libreadline-dev libbz2-dev libsqlite3-dev
+```
+
+### Files
+
+These are the files / directories that are created and/or modified with this
+install:
+
+```txt
+~/.bashrc (or your shell's equivalent)
+~/.config/envman/PATH.env
+~/.pyenv
+```
+
+## Cheat Sheet
+
+![](https://github.com/ewjoachim/zen-of-python/raw/master/zen_web.png)
+
+Python is a introductory programming language that focuses on Software
+Engineering principles - as laid out in _The Zen of Python_ (above).
+
+Note: `pyenv` (used here) is the only way you should ever install Python,
+otherwise you risk messing up your system version of python, and existing python
+projects.
+
+## How to reset to the system python?
+
+`pyenv` installs a conflict-free version of python that will not interfere with
+system utilities (which is why we love it so much).
+
+However, in the rare event that you need to switch your user profile's python
+back to the system version, you can do so:
+
+```bash
+pyenv global system
+```
+
+## How to use a specific version of python in a project?
+
+Go into the root of your project repository and run this, for example:
+
+```bash
+pyenv local -v 3.10.0
+```
+
+Change 3.10.0 to the version you want for that project, of course. 😁
+
+## Where to learn Python?
+
+[Learn Python 3 The Hard Way](https://learnpythonthehardway.org) is probably the
+best beginner resource.
+
+- [Physical Book + Video Course](https://amzn.to/3opwwxT) -
+- [eBook + Video Course](https://shop.learncodethehardway.org/access/buy/9/)
+- [Free Digital Copy](https://learnpythonthehardway.org/python3/)
+
+## What to learn after Python?
+
+Python's a great language for learning to program and it still has a lot of
+practical uses, but it's a product of its time and not as well-suited for modern
+web development as more modern languages that were designed to handle the types
+of problems that exist for programmers in today's world.
+
+What are the best alternatives?
+
+- [Go](https://webinstall.dev/golang) is a better choice for systems programming
+  and web development, and "is a language you can learn in a weekend".
+- [Rust](https://webinstall.dev/rustlang) is a better choice for games and
+  machine learning, but may be more difficult to master.
+- [Node](https://webinstall.dev/node) is a better choice for web programming and
+  programmer tooling.
+
+That all said, it's probably still worth it to learn Python first - it has much
+better learning resources than Node, and the learning resources for Go and Rust
+typically assume you've had experience with one of the languages they replace...
+such as Python.
+
+Once you learn _how to program_, you can easily apply that to _any_ language.
+
+90%+ of programming is _programming_. Maybe 10% is the language you choose.

python/install.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -e
+set -u
+
+function __init_python() {
+    if [[ ! -x "${HOME}/.pyenv/bin/pyenv" ]]; then
+        "${HOME}/.local/bin/webi" "pyenv"
+    fi
+    export PATH="${HOME}/.pyenv/bin:${PATH}"
+    export PATH="${HOME}/.pyenv/shims:${PATH}"
+
+    #eval "$(pyenv init -)"
+    #eval "$(pyenv virtualenv-init -)"
+
+    pyenv update
+
+    my_latest_python3="$(
+        pyenv install --list |
+            grep -v -- - |
+            grep '3\.[0-9]\+\.[0-9]\+$' |
+            tail -n 1 |
+            cut -d' ' -f3
+    )"
+
+    #my_python="${WEBI_VERSION:-${my_latest_python3}}"
+    my_python="${my_latest_python3}"
+    echo "Installing ${my_python}"
+    pyenv install -v "${my_python}"
+    pyenv global "${my_python}"
+
+    echo ''
+    echo 'NOTE: You may also need to CLOSE and RE-OPEN your terminal for pyenv to take effect.'
+    echo '(to switch versions of python, see https://webinstall.dev/pyenv)'
+    echo ''
+}
+
+__init_python

python2/README.md

@@ -0,0 +1,54 @@
+---
+title: Python 2 (via pyenv)
+homepage: https://webinstall.dev/pyenv
+tagline: |
+  Python 2 is the legacy version of Python.
+---
+
+To update or switch versions, run `pyenv install -v 2` (or `2.6`, etc).
+
+### How to Install python2 on macOS
+
+Make sure that you already have Xcode tools installed:
+
+```bash
+xcode-select --install
+```
+
+You may also need to install Xcode proper from the App Store.
+
+### How to Install python2 on Linux
+
+Make sure that you already have the necessary build tools installed:
+
+```bash
+# required
+sudo apt update
+sudo apt install -y build-essential zlib1g-dev libssl-dev
+
+# recommended
+sudo apt install -y libreadline-dev libbz2-dev libsqlite3-dev
+```
+
+### Files
+
+These are the files / directories that are created and/or modified with this
+install:
+
+```txt
+~/.bashrc (or your shell's equivalent)
+~/.config/envman/PATH.env
+~/.pyenv
+```
+
+## Cheat Sheet
+
+![](https://github.com/ewjoachim/zen-of-python/raw/master/zen_web.png)
+
+Unless you know you need Python 2 for a specific purpose, you should probably
+use [Python 3](/python) instead.
+
+For more info see these cheat sheets:
+
+- [Python 3](/python)
+- [pyenv](/pyenv)

python2/install.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -e
+set -u
+
+function __init_python2() {
+    if [[ ! -x "${HOME}/.pyenv/bin/pyenv" ]]; then
+        "${HOME}/.local/bin/webi" "pyenv"
+    fi
+    export PATH="${HOME}/.pyenv/bin:${PATH}"
+    export PATH="${HOME}/.pyenv/shims:${PATH}"
+
+    #eval "$(pyenv init -)"
+    #eval "$(pyenv virtualenv-init -)"
+
+    pyenv update
+
+    my_latest_python2="$(
+        pyenv install --list |
+            grep -v -- - |
+            grep '2\.[0-9]\+\.[0-9]\+$' |
+            tail -n 1 |
+            cut -d' ' -f3
+    )"
+
+    #my_python="${WEBI_VERSION:-${my_latest_python2}}"
+    my_python="${my_latest_python2}"
+    echo "Installing ${my_python}"
+    pyenv install -v "${my_python}"
+    pyenv global "${my_python}"
+
+    echo ''
+    echo 'NOTE: You may also need to CLOSE and RE-OPEN your terminal for pyenv to take effect.'
+    echo '(to switch versions of python, see https://webinstall.dev/pyenv)'
+    echo ''
+}
+
+__init_python2

python3/install.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# title: Python 3 (alias for python)
+# homepage: https://webinstall.dev/python
+# tagline: Alias for https://webinstall.dev/python
+# alias: python
+# description: |
+#   See https://webinstall.dev/python
+
+set -e
+set -u
+
+function __redirect_alias_python() {
+    echo "'python@${WEBI_TAG:-stable}' is an alias for 'python@${WEBI_VERSION:-}'"
+    WEBI_HOST=${WEBI_HOST:-"https://webinstall.dev"}
+    curl -fsSL "$WEBI_HOST/python@${WEBI_VERSION:-}" | bash
+}
+
+__redirect_alias_python