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[英]Continue executing INSERT script even on error - PostgreSQL using Python script
[英]Continue python script even after error ocurred
我有一個Python腳本,可以記錄我房間的溫度,並使用請求庫來發送數據。 有時我丟失了wifi信號,並且在請求出錯后腳本完全停止。
import sys
import time
import Adafruit_DHT
import requests
raspid = 1
sensor = 11
pin = 25
while True:
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
if humidity is not None and temperature is not None:
datos = {'temperatura': 'temperature', 'humedad': 'humidity', 'raspid': 'raspid'}
r = requests.post("http://httpbin.org/post", data=datos)
print(r.text)
else:
print ('Error de lectura!')
time.sleep(15)
從wifi斷開連接時出錯
Traceback (most recent call last):
File "/home/pi/Desktop/dht11 request post.py", line 19, in <module>
r = requests.post("http://mehr.cl/link.php", data=datos)
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 94, in post
return request('post', url, data=data, json=json, **kwargs)
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 49, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 457, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 569, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 407, in send
raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', error(101, 'Network is unreachable'))
>>>
有沒有辦法忽略錯誤,只是再試一次?
就在這里。 它正在嘗試,並捕捉任何錯誤。
基本上它是如何工作的:
try:
# Some action that could raise an error
except:
# What to do when an error occurs
有關更深入的說明,請查看文檔: 錯誤和例外 。
有幾個內置異常,其中包括ConnectionError
。 如果你知道你期望的確切異常,那么你必須將它添加到except
子句:
try:
# Actions that might raise a ConnectionError
except ConnectionError:
# Process the error, for instance, try again
您可能想要使用try-except語句。 如下
while True:
try:
#action which may create an error
except Exception as exc:
print('[!!!] {err}'.format(err=exc))
#action to perform: Nothing in your case
請注意,一個好的做法是錯誤永遠不會無聲通過 。
Exception
來處理錯誤,您仍然可以手動停止while
循環,因為您使用的是python27。
您可以將循環包裝在try語句中。
while True:
try:
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
if humidity is not None and temperature is not None:
datos = {'temperatura': 'temperature', 'humedad': 'humidity', 'raspid': 'raspid'}
r = requests.post("http://httpbin.org/post", data=datos)
print(r.text)
else:
print ('Error de lectura!')
time.sleep(15)
sys.exit(1)
except ConnectionError:
continue
通過這樣做,您的代碼將逃避錯誤,從而防止它在您失去連接時停止。
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