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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 _decode_telegram_base64(string):
 """ Decodes an url-safe base64-encoded string into its bytes by first adding the stripped necessary padding characters. This is the way Telegram shares binary data as strings, such as Bot API-style file IDs or invite links. Returns ``None`` if the input string was not valid. """

    try:
        return base64.urlsafe_b64decode(string + '=' * (len(string) % 4))
    except (binascii.Error, ValueError, TypeError):
        return None