def _clean_text(self, text):
    'Performs invalid character removal and whitespace cleanup on text.'
    output = []
    for char in text:
        cp = ord(char)
        if ((cp == 0) or (cp == 65533) or _is_control(char)):
            continue
        if _is_whitespace(char):
            output.append(' ')
        else:
            output.append(char)
    return ''.join(output)
Performs invalid character removal and whitespace cleanup on text.
def _clean_text(self, text):
    
    output = []
    for char in text:
        cp = ord(char)
        if ((cp == 0) or (cp == 65533) or _is_control(char)):
            continue
        if _is_whitespace(char):
            output.append(' ')
        else:
            output.append(char)
    return .join(output)