Intro to Python for Computer Science and Data Science: Learning to Program with AI, Big Data and The Cloud

8 Strings: A Deeper Look

Objectives

In this chapter you’ll:

• Understand text processing.

• Use string methods.

• Format string content.

• Concatenate and repeat strings.

• Strip whitespace from the ends of strings.

• Change characters from lowercase to uppercase and vice versa.

• Compare strings with the comparison operators.

• Search strings for substrings and replace substrings.

• Split strings into tokens.

• Concatenate strings into a single string with a specified separator between items.

• Create and use regular expressions to match patterns in strings, replace substrings and validate data.

• Use regular expression metacharacters, quantifiers, character classes and grouping.

• Understand how critical string manipulations are to natural language processing.