Readability

• Asking for permission instead of forgiveness
• Comparing things to None the wrong way
• Comparing things to True the wrong way
• Using type() to compare types
• Not using dict comprehensions
• Not using dict keys when formatting strings
• Not using items() to iterate over a dictionary
• Not using named tuples when returning more than one value from a function
• Not using unpacking for updating multiple values at once
• Not using zip() to iterate over a pair of lists
• Putting type information in a variable name
• Test for object identity should be is
• Using an unpythonic loop
• Using map() or filter() where list comprehension is possible
• Using CamelCase in function names