human
I wrote the below code

    daily_delta = (not (delta.total_seconds() % timedelta(days=1).total_seconds()))
    cur = start
    if daily_delta:
        cur = cur.replace(hour=0, minute=0, second=0, microsecond=0)
    def advance_current(cur):
        '\n                                Advances    the    current    dt    skipping    non    market    days    and    minutes.\n                                '
        cur = (cur + delta)
        currently_executing = ((daily_delta and (cur in trading_calendar.all_sessions)) or trading_calendar.is_open_on_minute(cur))
        if currently_executing:
            return cur
        elif daily_delta:
            return trading_calendar.minute_to_session_label(cur)
        else:
            return trading_calendar.open_and_close_for_session(trading_calendar.minute_to_session_label(cur))[0]
    while (cur < end):
        if repeats:
            for j in range(repeats):
                (yield cur)
        else:
            (yield cur)
        cur = advance_current(cur)

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def date_gen(start, end, trading_calendar, delta=timedelta(minutes=1), repeats=None):