Module 9: Strings

3.5.1 Construct strings and access their contents

• Create strings using single quotation marks, double quotation marks, and triple quotation marks.
• Use escape sequences introduced by the backslash character.
• Include quotation marks and apostrophes inside string literals.
• Create multiline strings.
• Access characters using positive and negative indexes.
• Extract substrings using slicing.
• Use slice start, stop, and step values with strings.
• Explain string immutability.
• Determine the length of a string using the len() function.
• Use the in and not in operators to test whether a substring is present.

3.5.2 Process and transform strings

• Change letter case using lower(), upper(), capitalize(), title(), and swapcase().
• Search for characters or substrings using find().
• Split strings into substrings using split().
• Join multiple strings using join().
• Remove whitespace or selected characters from string boundaries using strip(), lstrip(), and rstrip().
• Replace selected characters or substrings using replace().
• Recognize that string methods return new strings rather than modifying the original string.

3.5.3 Format values as strings

• Construct formatted string literals using f-strings.
• Insert variables and expressions into f-string replacement fields enclosed in {}.
• Recognize basic formatting performed using the format() method.
• Recognize basic legacy string formatting performed using the % operator.