start = "00:00"
    end = "23:59"
    times = []
    start = now = datetime.datetime.strptime(start, "%H:%M")
    end = datetime.datetime.strptime(end, "%H:%M")
    while now != end:
        times.append(str(now.strftime("%H:%M")))
        now += datetime.timedelta(minutes=1)
    times.append(end.strftime("%H:%M"))
    st.multiselect('Departure hour:',times)

改进答案：

times = []
for hours in range(0, 23):
  for minutes in range(0, 59):
    times.append(datetime.time(hours, minutes))
st.selectbox("Time", times, key="time", format_func=lambda t: t.strftime("%H:%M"))