如何捕获和管理GPS模块的异常？
如何捕获和管理GPS模块的异常？
提问于 2016-01-15 21:18:17
我有一个使用GPS模块的树莓派。为了使用这个模块，我运行的代码如下：
##Prints the latitude and longitude every second.
import time
import microstacknode.hardware.gps.l80gps
if __name__ == '__main__':
gps = microstacknode.hardware.gps.l80gps.L80GPS()
while True:
data = gps.get_gpgga()
List = [list(data.values())[x] for x in [7, 9, 12]]
string=str(List)
string = string[1:-1]
text_file = open("/home/pi/fyp/gps.txt","a")
text_file.write(string + "\n")
time.sleep(1)但是，它会时不时地给出这个错误，因为它找不到我的位置：
Traceback (most recent call last):
File "gps.py", line 8, in <module>
data = gps.get_gpgga()
File "/usr/lib/python3/dist-packages/microstacknode/hardware/gps/l80gps.py", line 119, in get_gpgga
pkt = self.get_nmea_pkt('GPGGA')
File "/usr/lib/python3/dist-packages/microstacknode/hardware/gps/l80gps.py", line 293, in get_nmea_pkt
"Timed out before valid '{}'.".format(pattern))
microstacknode.hardware.gps.l80gps.NMEAPacketNotFoundError: Timed out before valid 'GPGGA'.有这样的错误也没关系。我的问题是，一旦发生这种情况，程序就会停止运行。有没有一种方法可以捕捉到这个错误，并让程序循环返回并重试，即使它遇到了这个错误？
更新
if I try Stefan_Reinhardt's method, I would get the following error instead:
Traceback (most recent call last):
File "gps.py", line 9, in <module>
data = gps.get_gpgga()
File "/usr/lib/python3/dist-packages/microstacknode/hardware/gps/l80gps.py", line 119, in get_gpgga
pkt = self.get_nmea_pkt('GPGGA')
File "/usr/lib/python3/dist-packages/microstacknode/hardware/gps/l80gps.py", line 293, in get_nmea_pkt
"Timed out before valid '{}'.".format(pattern))
microstacknode.hardware.gps.l80gps.NMEAPacketNotFoundError: Timed out before valid 'GPGGA'.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "gps.py", line 10, in <module>
except NMEAPacketNotFoundError:
NameError: name 'NMEAPacketNotFoundError' is not defined回答 2
Stack Overflow用户
发布于 2016-01-15 21:33:10
我同意Oisin的回答，但我建议将try-except子句放在可能发生的地方，并使用continue语句传递while-loop的其余部分，这样看起来就像
##Prints the latitude and longitude every second.
import time
import microstacknode.hardware.gps.l80gps
if __name__ == '__main__':
gps = microstacknode.hardware.gps.l80gps.L80GPS()
while True:
try:
data = gps.get_gpgga()
except NMEAPacketNotFoundError:
continue
List = [list(data.values())[x] for x in [7, 9, 12]]
string=str(List)
string = string[1:-1]
text_file = open("/home/pi/fyp/gps.txt","a")
text_file.write(string + "\n")
time.sleep(1)Stack Overflow用户
发布于 2016-01-15 21:24:01
这应该可以工作，但它可能会陷入无限递归循环。
##Prints the latitude and longitude every second.
import time
import microstacknode.hardware.gps.l80gps
if __name__ == '__main__':
getPos()
def getPos():
try:
while True:
gps = microstacknode.hardware.gps.l80gps.L80GPS()
data = gps.get_gpgga()
List = [list(data.values())[x] for x in [7, 9, 12]]
string=str(List)
string = string[1:-1]
text_file = open("/home/pi/fyp/gps.txt","a")
text_file.write(string + "\n")
time.sleep(1)
except microstacknode.hardware.gps.l80gps.NMEAPacketNotFoundError:
getPos()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/34811972
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