Regular Expressions Development Tutorials, Guides & Insights

• The pattern r"[+-]?\d+(\.\d+)?" matches numbers like -3.5 and +27.85. It can handle both signed and unsigned numbers with a decimal point.

You can modify the pattern to match only positive numbers by removing the optional negative sign.

text = "Contact me at 123-456-7890 or 987.654.3210"
phone_pattern = r'\d{3}[-.]\d{3}[-.]\d{4}'
phones = re.findall(phone_pattern, text)
print(phones)  # Output: ['123-456-7890', '987.654.3210']

This cheat sheet provides a quick reference to the most common regex patterns and functions in Python. For more complex regex patterns and usage, consider exploring the Python re module documentation.

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