How can I check if a string contains only ASCII letters and spaces in Python?
Alex K

To check if a string contains only ASCII letters (uppercase or lowercase) and spaces in Python, you can use various approaches. Here's a long-form explanation of different methods to accomplish this: 1. Using String Methods and ASCII Ranges: - One approach is to iterate over each character in the string using afor loop and check if each character is an ASCII letter (using theisalpha() method) or a space character (using theisspace() method). - Additionally, you can use theord() function to obtain the Unicode code point of each character and check if it falls within the ASCII range. - If any character fails these checks, returnFalse. If all characters are ASCII letters or spaces, returnTrue. - Example:

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def contains_only_ascii_letters_and_spaces(string):
    for char in string:
   if not char.isalpha() and not char.isspace():
  return False
   if ord(char) > 127:
  return False
    return True

2. Using Regular Expressions: - Regular expressions can be used to match and validate the format of the string. - Import there module and define a regular expression pattern that matches only ASCII letters (uppercase or lowercase) and spaces. - The patternr'^[A-Za-z\s]+$' matches a string consisting of one or more ASCII letters (uppercase or lowercase) and spaces. - Use there.match() function to check if the entire string matches the pattern. - If it matches, returnTrue; otherwise, returnFalse. - Example:

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import re

def contains_only_ascii_letters_and_spaces(string):
    pattern = r'^[A-Za-z\s]+$'
    return bool(re.match(pattern, string))

Choose the method that best suits your requirements. Each approach checks if a string contains only ASCII letters and spaces, but they differ in terms of validation criteria, supported formats, and potential overhead.

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