Python从Geojson获得价值

时间：2018-09-17 14:56:39

标签： python json geojson

请有人可以共享一些Python脚本，这些脚本将循环遍历此geojson并检索“ attachment”下的值。我正在为这些而苦苦挣扎。

谢谢

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesWithMultidexlistForDebug'.
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:110)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:77)
    at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
    at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59)
    at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101)
    at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44)
    at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91)
    at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
    at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.run(EventFiringTaskExecuter.java:51)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:46)
    at org.gradle.execution.taskgraph.LocalTaskInfoExecutor.execute(LocalTaskInfoExecutor.java:42)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:277)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:262)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:135)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:130)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.execute(DefaultTaskPlanExecutor.java:200)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.executeWithWork(DefaultTaskPlanExecutor.java:191)
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.run(DefaultTaskPlanExecutor.java:130)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.RuntimeException: com.android.build.api.transform.TransformException: Error while generating the main dex list.
    at com.android.builder.profile.Recorder$Block.handleException(Recorder.java:55)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:104)
    at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:212)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:50)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:131)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:120)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:99)
    ... 31 more
Caused by: com.android.build.api.transform.TransformException: Error while generating the main dex list.
    at com.android.build.gradle.internal.transforms.D8MainDexListTransform.transform(D8MainDexListTransform.kt:127)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:221)
    at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:217)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
    ... 44 more
 Caused by: com.android.builder.multidex.D8MainDexList$MainDexListException: com.android.tools.r8.errors.CompilationError: Program type already present: com.learnium.RNDeviceInfo.BuildConfig
    at com.android.builder.multidex.D8MainDexList.generate(D8MainDexList.java:87)
    at com.android.build.gradle.internal.transforms.D8MainDexListTransform.transform(D8MainDexListTransform.kt:114)
    ... 47 more
Caused by: com.android.tools.r8.errors.CompilationError: Program type already present: com.learnium.RNDeviceInfo.BuildConfig
    at com.android.tools.r8.utils.ProgramClassCollection.resolveClassConflictImpl(ProgramClassCollection.java:64)
    at com.android.tools.r8.utils.ProgramClassCollection.lambda$create$0(ProgramClassCollection.java:25)
    at com.android.tools.r8.utils.ProgramClassCollection.create(ProgramClassCollection.java:24)
    at com.android.tools.r8.graph.LazyLoadedDexApplication$Builder.build(LazyLoadedDexApplication.java:121)
    at com.android.tools.r8.dex.ApplicationReader.read(ApplicationReader.java:122)
    at com.android.tools.r8.dex.ApplicationReader.read(ApplicationReader.java:86)
    at com.android.tools.r8.GenerateMainDexList.run(GenerateMainDexList.java:36)
    at com.android.tools.r8.GenerateMainDexList.run(GenerateMainDexList.java:95)
    at com.android.builder.multidex.D8MainDexList.generate(D8MainDexList.java:83)
    ... 48 more

2 个答案:

答案 0 :(得分：0)

请尝试以下代码

 import geojson
 gj = geojson.loads(jsonstr)
 if "attachment" in gj:
     for attachment in gj["attachment"]:
        print (attachment)

答案 1 :(得分：0)

您提供的示例json对我来说似乎无效geojson。您可以找到不严格的解析器，但是例如“ Tag_Number”行末尾的逗号（“，”）不应存在，并且我希望找到定义任何几何图形或几何图形的“ type”属性功能。

此外，geojson为json添加了语义，因此您可以出于任务目的将其视为Python中的任何json解析任务。

如果数据位于文件sample.geojson中，则可以使用load()方法从文件中读取数据：

import json

with open('sample.geojson') as data:
    geo = json.load(data)

这导致geo是您可以检查的常规Python Dictionary。通过调用geo.keys()，您可以找到数据中的所有键。

In [4]: geo.keys()
Out[4]: [u'fields', u'geom', u'extensions', u'id']

您可以通过指定键geo['extensions']来访问任何值，就像访问任何Python词典一样。 

In [5]: geo['extensions']
Out[5]:
{u'attachment': [{u'description': u'',
   u'id': 7,
   u'is_image': True,
   u'mime_type': u'image/jpeg',
   u'name': u'1531402833735.jpg',
   u'size': 4559151},
  {u'description': u'',
   u'id': 8,
   u'is_image': True,
   u'mime_type': u'image/jpeg',
   u'name': u'1531402882838.jpg',
   u'size': 6418150}],
 u'description': None}

由于extensions本身就是字典，因此您也可以引用它并遍历碰巧是字典列表的任何值。

In [6]: for item in geo['extensions']['attachment']:
    ...:     print(item['name'])
    ...:
1531402833735.jpg
1531402882838.jpg

在学习使用Python处理数据和数据结构时，您可能会发现ipython是一个有用的交互式工具。

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