这是我编写的代码。它解析xml，并在某个条件为true时打开灯。我遇到的问题是，如果重新启动脚本，读取或处理xml需要更长的时间。如果我再次启动，则需要更长的时间。因此，在某个时刻，需要10秒或更长的时间才能完成一个循环。
def core():
import urllib #import urllib.request
x = 0
while True:
### XML Extraction ###
from xml.dom import minidom
xml = urllib.urlopen("http://192.168.60.242/xml") # xml = urllib.request.urlopen("http://192.168.60.242/xml")
xml_string = xml.read()
xml.close()
re_string = xml_string[130:4000]
re_string = re_string.replace('</TEXTAREA></FORM></BODY></HTML>', '') #zwecks inkompatibilität mit Python 3.5, muss hier eine Änderung vorgenommen werden
#parsing
xmldoc = minidom.parseString(re_string)
Sensor0Elm = xmldoc.getElementsByTagName('t0')
Sensor1Elm = xmldoc.getElementsByTagName('t1')
#Sensor2Elm = xmldoc.getElementsByTagName('t2')
Sensor0Elm = Sensor0Elm[0]
Sensor1Elm = Sensor1Elm[0]
#Sensor2Elm = Sensor2Elm[0]
Sensor0 = Sensor0Elm.childNodes[0].data
Sensor1 = Sensor1Elm.childNodes[0].data
#Sensor2 = Sensor2Elm.childNodes[0].data
Sensor0 = float(Sensor0)
Sensor1 = float(Sensor1)
#Sensor2 = float(Sensor2)
#Datenaufbereitung
print (Sensor0*100.000000000001)
print (Sensor1*100.000000000001)
#print (Sensor2*100)
### int to bin ###
Sensor0=bin(int(Sensor0*100.000000000001))
Sensor1=bin(int(Sensor1*100.000000000001))
#Sensor2=bin(int(Sensor2*100))
Sensor0 = Sensor0[2:]
Sensor1 = Sensor1[2:]
#Sensor2 = Sensor2[2:]
Sensor0_count_int = int(len(str(Sensor0)))
Sensor1_count_int = int(len(str(Sensor1)))
#Sensor2_count_int = int(len(str(Sensor2)))
Sub0 = int(8 - Sensor0_count_int)
Sub1 = int(8 - Sensor1_count_int)
#Sub2 = int(8 - Sensor2_count_int)
Sensor0_compl = (str(Sub0*"0")+Sensor0)
Sensor1_compl = (str(Sub1*"0")+Sensor1)
#Sensor2_compl = (str(Sub2*"0")+Sensor2)
x = x+1
print (">>>", x ,"<<<")
print (Sensor0_compl)
print (Sensor1_compl)
#print (Sensor2_compl)
#############################
# import RPi.GPIO as GPIO
# GPIO.setmode(GPIO.BCM)
# GPIO.setup(4,GPIO.OUT)
# GPIO.setup(5,GPIO.OUT)
# GPIO.setup(6,GPIO.OUT)
# GPIO.setup(12,GPIO.OUT)
# GPIO.setup(13,GPIO.OUT)
# GPIO.setup(16,GPIO.OUT)
# GPIO.setup(17,GPIO.OUT)
# GPIO.setup(18,GPIO.OUT)
# GPIO.setup(19,GPIO.OUT)
# GPIO.setup(20,GPIO.OUT)
# GPIO.setup(21,GPIO.OUT)
# GPIO.setup(22,GPIO.OUT)
# GPIO.setup(23,GPIO.OUT)
# GPIO.setup(24,GPIO.OUT)
# GPIO.setup(25,GPIO.OUT)
#############################
#Sensor0
# AgCh3A=(Sensor0_compl[0:1])
# if AgCh3A=="0":
# GPIO.output(4,True)
# else:
# GPIO.output(4,False)
# AgPro2=(Sensor0_compl[1:2])
# if AgPro2=="0":
# GPIO.output(5,True)
# else:
# GPIO.output(5,False)
# CharRo440=(Sensor0_compl[2:3])
# if CharRo440=="0":
# GPIO.output(6,True)
# else:
# GPIO.output(6,False)
# AgInnoC=(Sensor0_compl[3:4])
# if AgInnoC=="0":
# GPIO.output(12,True)
# else:
# GPIO.output(12,False)
# AgInnoB=(Sensor0_compl[4:5])
# if AgInnoB=="0":
# GPIO.output(13,True)
# else:
# GPIO.output(13,False)
# ZK700=(Sensor0_compl[5:6])
# if ZK700=="0":
# GPIO.output(16,True)
# else:
# GPIO.output(16,False)
# AgF3000=(Sensor0_compl[6:7])
# if AgF3000=="0":
# GPIO.output(17,True)
# else:
# GPIO.output(17,False)
# ZK1200=(Sensor0_compl[7:8])
# if ZK1200=="0":
# GPIO.output(18,True)
# else:
# GPIO.output(18,False)
#Sensor1
# AgProV3=(Sensor1_compl[3:4])
# if AgProV3=="0":
# GPIO.output(19,True)
# else:
# GPIO.output(19,False)
# MakWPG1=(Sensor1_compl[4:5])
# if MakWPG1=="0":
# GPIO.output(20,True)
# else:
# GPIO.output(20,False)
# AgExcell2eC=(Sensor1_compl[5:6])
# if AgExcell2eC=="0":
# GPIO.output(21,True)
# else:
# GPIO.output(21,False)
# AgCh2eC=(Sensor1_compl[6:7])
# if AgCh2eC=="0":
# GPIO.output(22,True)
# else:
# GPIO.output(22,False)
# AgCh3B=(Sensor1_compl[7:8])
# if AgCh3B=="0":
# GPIO.output(23,True)
# else:
# GPIO.output(23,False)
#################################
# MM5=(Sensor1_compl[5:6])
# if MM5=="0":
# GPIO.output(24,True)
# else:
# GPIO.output(24,False)
# MM6=(Sensor1_compl[6:7])
# if MM6=="0":
# GPIO.output(25,True)
# else:
# GPIO.output(25,False)
# MM7=(Sensor2_compl[0:1])
# if MM7=="0":
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
#Sensor2
# MMM0=int(Sensor2[2:3])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM1=int(Sensor2[3:4])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM2=int(Sensor2[4:5])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM3=int(Sensor2[5:6])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM4=int(Sensor2[6:7])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM5=int(Sensor2[7:8])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM6=int(Sensor2[8:9])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
# MMM7=int(Sensor2[9:10])
# if M0==1:
# GPIO.output(1,True)
# else:
# GPIO.output(1,False)
#import time
#time.sleep(1)
#GPIO.cleanup()
def main():
import time
while True:
try:
core()
except:
continue
time.sleep(0.01)
main()
有人知道我的问题是从哪里来的吗？
感谢
我怀疑脚本没有在你认为的时候关闭。检查这一点的明显方法是查看pythonw.exe是否仍在任务管理器中运行。
真的，真的，确保你可以在try/except:的"继续"块中创建一个文件
with open('filepathfile.txt','w') as myfile:
pass
然后，当你认为你已经杀死了脚本时，删除这个文件，看看它是否会回来。您必须将超时时间增加到1秒左右，以避免系统中充斥着文件创建请求。
不过，有两件事需要先尝试：
- 去掉
core()顶部的while True，似乎没有必要 - 将你的呼叫循环频率降低到，比如说每秒一到两次