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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_token(token: str) -> bool: """ Validate BOT token :param token: :return: """

    if any(x.isspace() for x in token):
        raise exceptions.ValidationError('Token is invalid!')

    left, sep, right = token.partition(':')
    if (not sep) or (not left.isdigit()) or (len(left) < 3):
        raise exceptions.ValidationError('Token is invalid!')

    return True