Extracting Words from Strings in Python

Introduction

In Python, a string is a sequence of characters enclosed within single or double quotes. Sometimes, we need to extract individual words from a string. In this challenge, you are tasked with writing a function that takes a string and returns a list of words.

Skills Graph

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String to Words Challenge

Problem

Write a function string_to_words(s: str, pattern: str = '[a-zA-Z-]+') -> List[str] that takes a string s and an optional pattern string as arguments and returns a list of words in the string.

The function should use re.findall() with the supplied pattern to find all matching substrings.

If the pattern argument is not provided, the function should use the default regexp, which matches alphanumeric and hyphens.

Example

string_to_words('I love Python!!') ## ['I', 'love', 'Python'] string_to_words('python, javaScript & coffee') ## ['python', 'javaScript', 'coffee'] string_to_words('build -q --out one-item', r'\b[a-zA-Z-]+\b') ## ['build', 'q', 'out', 'one-item']

String to Words (Challenge)

Introduction

Skills Graph

String to Words Challenge

Problem

Example

Summary

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