因此,我正在尝试实现计时例程,我需要返回秒(秒),以便计时例程启动灯。我研究过的原始代码让我相当了解:
from datetime import datetime
from threading import Timer
x=datetime.today()
y=x.replace(day=x.day+1, hour=1, minute=0, second=0, microsecond=0)
delta_t=y-x
secs=delta_t.seconds+1
def hello_world():
print "hello world"
#...
t = Timer(secs, hello_world)
t.start()
唯一的问题是我将x.replace用作用户输入变量,现在出现错误“ TypeError:-:'datetime.time'和'datetime.time'不受支持的操作数类型”
我理解这是因为您不能直接直接减去两个datetime.datetime.time(),但是我不确定如何将它们转换为可以使用的东西。到目前为止,这是我的代码
import datetime
from threading import Timer
import tkinter as tk
import time
# =============================================================================
# userInput takes a formatted input and passes it back to main.
# =============================================================================
def userInput():
try:
a = datetime.datetime.strptime(input('When would you like to routine to start in HH:MM 24 hour format: '), "%H:%M").time()
print (a.strftime("%H:%M"))
except:
print ("Please enter correct time in HHMM format")
return a
# =============================================================================
# timeComparator is a function which, if the user changes any settings or chooses
# start in the middle of a cycle, implements the correct routine depending on where
# in the cycle it's in.
# =============================================================================
def timeComparator(a):
now = datetime.datetime.now().time()
#this obtains the current time
#if statement compares input from
print("the time now is: ", now)
if (now < a):
print ("hello human")
elif (now > a):
print ("hello plant")
# =============================================================================
# This routine is hard coded and cannot be changed by the user. It assumes that
# there will be a total of 12 hours of light with the last hour, in other words
# the last 8% of light, shifting from a natural blue hue to a more red hue.
# The auto routine will start at 8am and end at 8pm. By ending, the routine
# stops light shifting and finally at 830PM, the lights turn off.
# NOTE NOTE NOTE NOTE NOTE
# This is NOT the actual light routine. This is JUST function that records
# the time and returns the seconds that begins the start command for the lights
# =============================================================================
def autoRoutine(a):
now = datetime.datetime.now().time()
#this is the start of the auto routine
start=a
delta_t = start-now
secs = delta_t.seconds+1
return secs
def blueFade():
print("the lights are starting")
# =============================================================================
# Main function. Will be used to call all other functions
# =============================================================================
if __name__=="__main__":
a = userInput()
timeComparator(a)
secs = autoRoutine(a)
lights = Timer(secs, blueFade)
lights.start()
所以,到最后,我无法操作代码行
delta_t = start-now
,由于这个原因,我无法启动lights.start()函数。我曾尝试使用time.strptime进行比较,但没有像time.mktime()那样成功。
答案 0 :(得分:1)
要确定以now()
为单位的秒增量和以小时和分钟为单位的时间增量,我们可以使用time.hour
,time.minute
和time.second
属性。
问题代码中的问题是它试图对两个datetime.time对象进行减法运算
def autoRoutine(a):
now = datetime.datetime.now().time()
#this is the start of the auto routine
start=a
delta_t = start-now
secs = delta_t.seconds+1
return secs
这将产生:
File "<ipython-input-18-98011edfef89>", line 65, in autoRoutine
delta_t = start-now
TypeError: unsupported operand type(s) for -: 'datetime.time' and 'datetime.time'
要纠正,我们可以将datetime.time
转换为秒。参见convert-datetime-time-to-seconds
将此答案应用于您的问题,我们有:
def autoRoutine(a):
now = datetime.datetime.now().time()
startSeconds = ((a.hour * 60) + a.minute) * 60
nowSeconds = (((now.hour * 60) + now.minute) * 60) + now.second
startSeconds - nowSeconds