slides and exercise part 6

exercises/Exercise 6a PEP8.md

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+## Exercise 6a: PEP8
+
+#### Goal
+
+Get you familiar with some of the fun facts hidden in the PEP8 guide.
+
+#### Preparation
+
+(none)
+
+#### Tasks
+
+0. Navigate to [PEP8](https://peps.python.org/pep-0008/).
+
+1. Depending on your assigned letter, answer the questions in the corresponding
+   set below. Feel to tackle the questions out of order. You can also split the
+   questions between your pair, but be you must leave time to discuss the answers
+   together.
+
+##### Set A
+1. What should you use instead of if y == None?
+2. If you have an acronym in camel case, should you capitalize the first letter
+   only or the whole acronym?
+3. How should you check if a variable equals False?
+4. What is important about how underscores work with variable names? What happens
+   if I put an underscore after a variable? One before? Two before?
+5. How many spaces should you use after a period in a comment?
+
+##### Set B
+1. What are the capitalization guidelines for classes, functions, and variables?
+   Give examples.
+2. How should you check if a path ends in .txt?
+3. What is the difference between mixed case, camel case, and snake case?
+4. How should you indicate block comments?
+5. What are the whitespace rules around operators? Give several examples.
+
+##### Set C
+1. If I need to import os, sys, numpy, matplotlib, and a local module called 
+   _utils.py, what does my import block look like?
+2. How many blank lines go before a function I define at the top of a module? How
+   many after?
+3. Which of these is correct: x[3:4] or x[3 : 4]?
+4. Should you use single or double quotes to indicate strings?
+5. Give examples of a long line of code and how you can break it onto multiple
+   lines.