update to fstrings in 2 episodes

Author: chennesy

episodes/functions.md

@@ -77,11 +77,15 @@ A
 `max()` and `min()` must be given at least one argument and they must be given things that can meaningfully be compared.
 
 ```python
-print(max(1, 'a'))
+max(1, 'a')
 ```
 
 ```error
-TypeError: unorderable types: str() > int()
+TypeError                                 Traceback (most recent call last)
+Cell In[6], line 1
+----> 1 max(1, 'a')
+
+TypeError: '>' not supported between instances of 'str' and 'int'
 ```
 
 ## Function argument default values, and `round()`.
@@ -131,11 +135,11 @@ round(...)
 
 ## Every function returns something.
 
-Every function call produces some result and if the function doesn't have a useful result to return, it usually returns the special value `None`.
+Every function call produces some result and if the function doesn't have a useful result to return, it usually returns the special value `None`. Each line of Python code is executed in order. In this case, the second line call to `{result}` returns 'None' since the `print` statement in the previous line didn't return a value to the `result` variable.
 
 ```python
 result = print('example')
-print('result of print is', result)
+print(f'result of print is {result}')
 ```
 
 ```output

episodes/libraries.md

@@ -43,7 +43,7 @@ Use `import` to load a library into a program's memory. Then you can refer to th
 ```python
 import string
 
-print('The lower ascii letters are', string.ascii_lowercase)
+print(f'The lower ascii letters are {string.ascii_lowercase}')
 print(string.capwords('capitalise this sentence please.'))
 ```
 
@@ -109,7 +109,7 @@ You can use `from ... import ...` to load specific items from a library module t
 ```python
 from string import ascii_letters
 
-print('The ASCII letters are', ascii_letters)
+print(f'The ASCII letters are {ascii_letters}')
 ```
 
 ```output

learners/setup.md

@@ -5,7 +5,7 @@ title: Setup
 ## Installing Python Using Anaconda
 Python is a popular language for research computing, and great for general-purpose programming as well. Installing all of its research packages individually can be a bit difficult, so we recommend Anaconda, an all-in-one installer.
 
-Regardless of how you choose to install it, please make sure you install Python 3.x. The latest 3.x version recommended on [Python.org][python] is fine.
+Regardless of how you choose to install it, please make sure you install Python 3.6 or above. The latest 3.x version recommended on [Python.org][python] is fine.
 
 We will teach Python using JupyterLab, a programming environment that runs in a web browser (JupyterLab will be installed by Anaconda). For this to work you will need a reasonably up-to-date browser. The current versions of the Chrome, Safari and Firefox browsers are all supported (some older browsers, including Internet Explorer version 9 and below, are not).