Function remove_non_letters

strings/detecting_english_programmatically.py:27–40

>>> remove_non_letters("Hi! how are you?") 'Hi how are you' >>> remove_non_letters("P^y%t)h@o*n") 'Python' >>> remove_non_letters("1+1=2") '' >>> remove_non_letters("www.google.com/") 'wwwgooglecom' >>> remove_non_letters("") ''

(message: str)

def remove_non_letters(message: str) -> str:
    """
    >>> remove_non_letters("Hi! how are you?")
    'Hi how are you'
    >>> remove_non_letters("P^y%t)h@o*n")
    'Python'
    >>> remove_non_letters("1+1=2")
    ''
    >>> remove_non_letters("www.google.com/")
    'wwwgooglecom'
    >>> remove_non_letters("")
    ''
    """
    return "".join(symbol for symbol in message if symbol in LETTERS_AND_SPACE)


def is_english(