我正在使用请求并像每11秒那样从API循环获取数据，并将其显示在LCD上。它可以正常运行，但是几个小时后出现json.decoder.jsondecodeerror expecting value line 1 column 1 (char 0)错误，我必须手动重新运行该程序。我不知道如何解决。
这是代码。 api链接显示json格式的公交车位置，并每11秒刷新一次。我在具有1602液晶显示器的raspbian os（raspberry pi 3）上运行它。
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time
import datetime
import requests
import json
import I2C_LCD_driver
# from time import *
mylcd = I2C_LCD_driver.lcd()
turkcec = [
[0b01110,
0b10001,
0b10000,
0b10000,
0b10000,
0b10001,
0b01110,
0b00100],
]
def get_data():
url = "***"
response = requests.get(url)
data = response.text
parsed = json.loads(data)
list = []
for i in range(len(parsed["busList"])):
if parsed["busList"][i]["disabledPerson"] == 0:
list.append(
str(parsed["busList"][i]["displayRouteCode"]) + " " + parsed["busList"][i]["stopDiff"] + "drk " +
parsed["busList"][i]["timeDiff"] + "dk " + "E")
else:
list.append(
str(parsed["busList"][i]["displayRouteCode"]) + " " + parsed["busList"][i]["stopDiff"] + "drk " +
parsed["busList"][i]["timeDiff"] + "dk")
return list
data = get_data()
while True:
starttime = time.time()
while len(data) > 0:
#time.sleep(5)
for x in range(0, len(data), 2):
mylcd.lcd_clear()
print(data[x])
if data[x][0] == "Ç":
mylcd.lcd_load_custom_chars(turkcec)
mylcd.lcd_write(0x80)
mylcd.lcd_write_char(0)
mylcd.lcd_display_string(data[x][1:], 1, 1)
else:
mylcd.lcd_display_string(data[x], 1)
if x == len(data) - 1:
time.sleep(11)
break
if data[x + 1][0] == "Ç":
mylcd.lcd_load_custom_chars(turkcec)
mylcd.lcd_write(0xc0)
mylcd.lcd_write_char(0)
mylcd.lcd_display_string(data[x + 1][1:], 2, 1)
else:
mylcd.lcd_display_string(data[x + 1], 2)
print(data[x + 1])
time.sleep(11)
if (
time.time() - starttime) >= 11.0:
starttime = time.time()
data = get_data()
print("--------")
else:
mylcd.lcd_clear()
while True:
data = get_data()
mylcd.lcd_display_string(time.strftime("%d/%m/%Y"), 1, 3)
mylcd.lcd_display_string(time.strftime("%H:%M:%S"), 2, 4)
time.sleep(1)
if len(data) > 0:
break
continue
这是api链接的结果。我需要来自"busList"的值。
{
"result": {
"cmd": "/api/bus/closest",
"code": 0,
"message": "OK",
"dateTime": "20200215145439",
"debugTimeDiff": "",
"authType": ""
},
"stopInfo": {
"busStopid": "18",
"busStopName": "İSKELE",
"lat": "40.1502179",
"lng": "26.4031012"
},
"busList": [
{
"busId": "17059",
"plate": "17-H-0059",
"disabledPerson": "0",
"displayRouteCode": "Ç3",
"displayName": "Ç-3",
"headSign": "Ç-3",
"routeCode": "70003",
"shapeId": "700030",
"stopDiff": "2",
"timeDiff": "1",
"lat": "40.14762",
"lng": "26.406181"
},
{
"busId": "17070",
"plate": "17-H-0070",
"disabledPerson": "0",
"displayRouteCode": "Ç8",
"displayName": "Ç-8",
"headSign": "Ç-8",
"routeCode": "70008",
"shapeId": "700080",
"stopDiff": "2",
"timeDiff": "5",
"lat": "40.14622",
"lng": "26.40825"
},
{
"busId": "17076",
"plate": "17-H-0076",
"disabledPerson": "0",
"displayRouteCode": "Ç1",
"displayName": "Ç-1",
"headSign": "Ç-1",
"routeCode": "70001",
"shapeId": "700010",
"stopDiff": "3",
"timeDiff": "9",
"lat": "40.14187",
"lng": "26.40788"
},
{
"busId": "17034",
"plate": "17-H-0034",
"disabledPerson": "0",
"displayRouteCode": "Ç7",
"displayName": "Ç-7",
"headSign": "Ç-7",
"routeCode": "70007",
"shapeId": "700070",
"stopDiff": "9",
"timeDiff": "14",
"lat": "40.132263",
"lng": "26.409042"
},
{
"busId": "17029",
"plate": "17-H-0029",
"disabledPerson": "0",
"displayRouteCode": "Ç3",
"displayName": "Ç-3",
"headSign": "Ç-3",
"routeCode": "70003",
"shapeId": "700030",
"stopDiff": "5",
"timeDiff": "14",
"lat": "40.145737",
"lng": "26.4206"
},
{
"busId": "17018",
"plate": "17-H-0018",
"disabledPerson": "0",
"displayRouteCode": "ÇT3",
"displayName": "ÇT3",
"headSign": "ÇT3",
"routeCode": "70016",
"shapeId": "700160",
"stopDiff": "5",
"timeDiff": "15",
"lat": "40.14575",
"lng": "26.420376"
},
{
"busId": "17042",
"plate": "17-H-0042",
"disabledPerson": "0",
"displayRouteCode": "11K",
"displayName": "11K",
"headSign": "11K",
"routeCode": "70012",
"shapeId": "700120",
"stopDiff": "9",
"timeDiff": "19",
"lat": "40.12353",
"lng": "26.410328"
}
],
"routeList": [
{
"routeCode": "70004",
"displayRouteCode": "Ç4",
"name": "Ç-4",
"headSign": "KOCATEPE CAMİ",
"stopArrivalTime": ""
},
{
"routeCode": "70005",
"displayRouteCode": "Ç5",
"name": "Ç-5",
"headSign": "SSK Durağı",
"stopArrivalTime": ""
},
{
"routeCode": "70011",
"displayRouteCode": "11G",
"name": "11G",
"headSign": "SSK Durağı",
"stopArrivalTime": ""
},
{
"routeCode": "71016",
"displayRouteCode": "960",
"name": "960",
"headSign": "Eski Hastane",
"stopArrivalTime": ""
},
{
"routeCode": "72011",
"displayRouteCode": "11G-T",
"name": "11G",
"headSign": "NUSRET YURDU",
"stopArrivalTime": ""
}
]
}
这是错误。
Traceback (most recent call last):
File "/home/pi/Desktop/xxx/xxx.py", line x, in <module>
data = get_data()
File "/home/pi/Desktop/xxx/xxx.py", line, in get_data
parsed = json.loads(data)
File "/usr/lib/python3.5/json/__init__.py", line 319, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.5/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.5/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
我找到了解决方案。谢谢
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time
import datetime
import requests
import json
import I2C_LCD_driver
# from time import *
mylcd = I2C_LCD_driver.lcd()
turkcec = [
[0b01110,
0b10001,
0b10000,
0b10000,
0b10000,
0b10001,
0b01110,
0b00100],
]
while True:
try:
def get_data():
url = "***"
response = requests.get(url)
data = response.text
parsed = json.loads(data)
list = []
for i in range(len(parsed["busList"])):
if parsed["busList"][i]["disabledPerson"] == 0:
list.append(
str(parsed["busList"][i]["displayRouteCode"]) + " " + parsed["busList"][i]["stopDiff"] + "drk " +
parsed["busList"][i]["timeDiff"] + "dk " + "E")
else:
list.append(
str(parsed["busList"][i]["displayRouteCode"]) + " " + parsed["busList"][i]["stopDiff"] + "drk " +
parsed["busList"][i]["timeDiff"] + "dk")
return list
data = get_data()
while True:
starttime = time.time()
while len(data) > 0:
# time.sleep(5)
for x in range(0, len(data), 2):
mylcd.lcd_clear()
print(data[x])
if data[x][0] == "Ç":
mylcd.lcd_load_custom_chars(turkcec)
mylcd.lcd_write(0x80)
mylcd.lcd_write_char(0)
mylcd.lcd_display_string(data[x][1:], 1, 1)
else:
mylcd.lcd_display_string(data[x], 1)
if x == len(data) - 1:
time.sleep(11)
break
if data[x + 1][0] == "Ç":
mylcd.lcd_load_custom_chars(turkcec)
mylcd.lcd_write(0xc0)
mylcd.lcd_write_char(0)
mylcd.lcd_display_string(data[x + 1][1:], 2, 1)
else:
mylcd.lcd_display_string(data[x + 1], 2)
print(data[x + 1])
time.sleep(11)
if (
time.time() - starttime) >= 11.0:
starttime = time.time()
data = get_data()
print("--------")
else:
mylcd.lcd_clear()
while True:
data = get_data()
mylcd.lcd_display_string(time.strftime("%d/%m/%Y"), 1, 3)
mylcd.lcd_display_string(time.strftime("%H:%M:%S"), 2, 4)
time.sleep(1)
if len(data) > 0:
break
continue
except:
if (time.time() - starttime) >= 11.0:
continue