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Strings & text

Format, split, join, parse, and clean text — everyday Python string patterns.

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Strings & text easy

How to Detect if a String Contains Only ASCII in Python

This code defines a function that checks whether every character in a given string is an ASCII character (Unicode code point < 128) and demonstrates it with multiple test cases.

ascii string validation
Python 
def is_ascii_only(text: str) -> bool:
    """Return True if all characters in text are ASCII, False otherwise."""
    return all(ord(char) < 128 for char in text)


if __name__ == "__main__":
    # Test cases
    samples = [
        "Hello, world!",
        "Café au lait",
        "日本語テキスト",
        "ASCII only 123",
…
17 0 Open

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