Question

我希望访问'elevation'的值，即1608.637939453125，并将其存储到变量'g'中。以下是代码

    import requests, json
r = requests.get(api link)

r= json.loads(r.text)

g=r['results']['elevation']

上面的代码返回此错误

TypeError: list indices must be integers or slices, not str

这是词典数据

  {

   "results" : [
      {
         "elevation" : 1608.637939453125,
         "location" : {
            "lat" : 39.7391536,
            "lng" : -104.9847034
         },
         "resolution" : 4.771975994110107
      }
   ],
   "status" : "OK"
}

Answer 1

在这种情况下，elevation是字典列表，而不是另一个字典。所以你必须像这样访问g = x['results'][0]['elevation']的值：

for result in x['results']:
  print(result)

如果结果列表中有更多条目（这是常见的），您可以像这样循环遍历它们：

@echo off

set name=Backup

for /f "tokens=1-3 delims=/:" %%a in ("%TIME%") do (set mytime=%%a.%%b,%%c)
set mytime=%mytime:~0,8%
set backupname=%name%_%date%_%mytime%

set dir1= (here comes the source directory)
set dir2= (here comes the target directory)

set countvar=1

:start

For /f "tokens=1-3 delims=/:" %%a in ("%TIME%") do (set mytime=%%a.%%b,%%c)
set mytime=%mytime:~0,8%

set backupname=%name%_%date%_%mytime%
set dir2=(here comes the target directory)\%backupname%
echo Backupordner: %backupname%
ROBOCOPY %dir1% %dir2%

if "%countvar%" == "1" (
    set VarDir1=%dir2%
)
if "%countvar%" == "2" (
    set VarDir2=%dir2%
)
if "%countvar%" == "3" (
    set VarDir3=%dir2%
    rmdir /S /Q "%VarDir1%"
    set VarDir1=%VarDir2%
    set VarDir2=%VarDir3%
    set /a countvar=%countvar%-1
)
set /a countvar=%countvar%+1

@ping -n 30 localhost> nul

goto start

在python中访问转换为字典的嵌套JSON中的键值

1 个答案: