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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 press(keys, presses=1, interval=0.0, pause=None, _pause=True):
 """Performs a keyboard key press down, followed by a release. Args: key (str, list):
 The key to be pressed. The valid names are listed in KEYBOARD_KEYS. Can also be a list of such strings. presses (integer, optiional):
 the number of press repetition 1 by default, for just one press interval (float, optional):
 How many seconds between each press. 0.0 by default, for no pause between presses. pause (float, optional):
 How many seconds in the end of function process. None by default, for no pause in the end of function process. Returns: None """

    if type(keys) == str:
        keys = [keys] # put string in a list
    else:
        lowerKeys = []
        for s in keys:
            if len(s) > 1:
                lowerKeys.append(s.lower())
            else:
                lowerKeys.append(s)
    interval = float(interval)
    for i in range(presses):
        for k in keys:
            _failSafeCheck()
            platformModule._keyDown(k)
            platformModule._keyUp(k)
        time.sleep(interval)

    _autoPause(pause, _pause)