Question

I’m trying to take localtime and turn it into individual reversed binary arrays/lists.

Here is my working code:

    secs = time.localtime()
    year, month, day, hour, minute, second, weekday, yearday, daylight = secs

    seconds_string = "{0:#b}".format(second)
    seconds_string = seconds_string[2:]
    seconds_list = list(seconds_string[::-1])

    minutes_string = "{0:#b}".format(minute)
    minutes_string = minutes_string[2:]
    minutes_list = list(minutes_string[::-1])

    hours_string = "{0:#b}".format(hour)
    hours_string = hours_string[2:]
    hours_list = list(hours_string[::-1])

I would like to make this more concise if possible, but attempts like the following aren’t working.

    seconds_list = list("{0:#b}".format(second)[2::-1])

Is there a way to do this that I’m missing?

Answer 1

What you want is actually

seconds_list = list("{0:#b}".format(second)[:1:-1])

The syntax is a little weird; slicing is from:to:step. This is a from of None, a to of 1, and a step of -1; when the step is negative, from defaults to the end of the string, so this means “from the end of the string backwards, up to but not including position 1”.