Merge pull request #1 from TeachBooks/mude-copy

Copy of environments stuff from Mude

book/_toc.yml

@@ -4,4 +4,5 @@ root: intro.md
 parts:
   - caption: Contents
     chapters:
-    - file: references.md
+    - file: environments.md
+    - file: references.md

book/environments.md

@@ -0,0 +1,22 @@
+# Environments
+
+Once installed Anaconda, we will check to make sure you are ready to use Python. Anaconda provides environments, like small virtual mini-computers inside your real computer, and inside each of those environments you might have Python (and a lot of Python packages, probably). Let’s try it:
+
+1. Open a command line interface on your computer:
+    - Windows users: this will be the anaconda or conda prompt (search for it in the Start menu at the bottom left of your screen)
+    - Mac users: use the “terminal” application
+2. Once the command line interface is open, type then execute (hit return) the following: `python --version`
+3. You should be have a somewhat [recent version of Python](https://www.python.org/doc/versions/). If not, don’t worry, we will try to fix it later on
+4. Which environment are you in? The name is between parenthesis at the bottom of your Anaconda Prompt: by default, this should be `(base)`.
+5. How many other environments do you have? Execute `conda env list` to see a complete list.
+6. Do you see the `*` in the list of environments? That is indicating your current active environment. Unless you have changed something, it should be `base`. And if you just installed Anaconda or Miniconda for the first time, this will be your only environment!
+
+Now we will make sure you have an environment to get started. We'll just make sure `pip` is included in this environment so we can use that to install more stuff later on.
+
+The following steps will create an Anaconda environment:
+
+1. Open the commmand line interface (see above)—you can also continue in the same session if it is still active
+2. Execute: `conda create -n myenv pip` (this may take several minutes)
+3. Activate: `conda activate myenv`
+4. Check: you should now see `myenv` displayed somewhere in the prompt between parenthesis, like this: `(myenv)`
+One important reminder: throughout your project, you should be using the `myenv` environment every time. All you have to do is remember to use the command `conda activate myenv` prior to opening your preferred code editor, or select the `myenv` environment from without your code editor.