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ee.List.get
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| Utilizzo | Resi |
|---|
List.get(index) | Oggetto |
| Argomento | Tipo | Dettagli |
|---|
questo: list | Elenco | |
index | Numero intero | |
Esempi
Editor di codice (JavaScript)
// An ee.List object.
var list = ee.List([5, 10, 15, 20, 25, 30]);
// Fetch elements at specified 0-based positions in the list.
print('The second element', list.get(1));
print('The fourth element', list.get(3));
print('The last element', list.get(-1));
print('The second to last element', list.get(-2));
// ee.Number and integer computed objects are valid inputs.
print('Computed object index input', list.get(list.get(0)));
// The result of ee.List.get is an ambiguous object type. You need to cast the
// result to the expected type to use it in subsequent instance methods. For
// example, if you are fetching a number and wish to add it to another number,
// you must cast the .get() result as an ee.Number.
print('Add fetched number to another number', ee.Number(list.get(1)).add(2));
Configurazione di Python
Consulta la pagina
Ambiente Python per informazioni sull'API Python e sull'utilizzo di
geemap per lo sviluppo interattivo.
import ee
import geemap.core as geemap
Colab (Python)
# An ee.List object.
ee_list = ee.List([5, 10, 15, 20, 25, 30])
# Fetch elements at specified 0-based positions in the list.
print('The second element:', ee_list.get(1).getInfo())
print('The fourth element:', ee_list.get(3).getInfo())
print('The last element:', ee_list.get(-1).getInfo())
print('The second to last element:', ee_list.get(-2).getInfo())
# ee.Number and integer computed objects are valid inputs.
print('Computed object index input:', ee_list.get(list.get(0)).getInfo())
# The result of ee.List.get is an ambiguous object type. You need to cast the
# result to the expected type to use it in subsequent instance methods. For
# example, if you are fetching a number and wish to add it to another number,
# you must cast the .get() result as an ee.Number.
print('Add fetched number to another number:',
ee.Number(list.get(1)).add(2).getInfo())
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
Ultimo aggiornamento 2025-07-26 UTC.
[null,null,["Ultimo aggiornamento 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003eList.get()\u003c/code\u003e retrieves an element from an Earth Engine List object at a specified index.\u003c/p\u003e\n"],["\u003cp\u003eNegative index values can be used to access elements from the end of the list, with -1 representing the last element.\u003c/p\u003e\n"],["\u003cp\u003eThe returned element's type is ambiguous and might require explicit casting to a specific Earth Engine type for further operations (e.g., converting to ee.Number to perform calculations).\u003c/p\u003e\n"],["\u003cp\u003eInput indices can be integers, ee.Number objects, or other computed objects that evaluate to an integer.\u003c/p\u003e\n"]]],[],null,["# ee.List.get\n\nReturns the element at the specified position in list. A negative index counts backwards from the end of the list.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------|---------|\n| List.get`(index)` | Object |\n\n| Argument | Type | Details |\n|--------------|---------|---------|\n| this: `list` | List | |\n| `index` | Integer | |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// An ee.List object.\nvar list = ee.List([5, 10, 15, 20, 25, 30]);\n\n// Fetch elements at specified 0-based positions in the list.\nprint('The second element', list.get(1));\nprint('The fourth element', list.get(3));\nprint('The last element', list.get(-1));\nprint('The second to last element', list.get(-2));\n\n// ee.Number and integer computed objects are valid inputs.\nprint('Computed object index input', list.get(list.get(0)));\n\n// The result of ee.List.get is an ambiguous object type. You need to cast the\n// result to the expected type to use it in subsequent instance methods. For\n// example, if you are fetching a number and wish to add it to another number,\n// you must cast the .get() result as an ee.Number.\nprint('Add fetched number to another number', ee.Number(list.get(1)).add(2));\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# An ee.List object.\nee_list = ee.List([5, 10, 15, 20, 25, 30])\n\n# Fetch elements at specified 0-based positions in the list.\nprint('The second element:', ee_list.get(1).getInfo())\nprint('The fourth element:', ee_list.get(3).getInfo())\nprint('The last element:', ee_list.get(-1).getInfo())\nprint('The second to last element:', ee_list.get(-2).getInfo())\n\n# ee.Number and integer computed objects are valid inputs.\nprint('Computed object index input:', ee_list.get(list.get(0)).getInfo())\n\n# The result of ee.List.get is an ambiguous object type. You need to cast the\n# result to the expected type to use it in subsequent instance methods. For\n# example, if you are fetching a number and wish to add it to another number,\n# you must cast the .get() result as an ee.Number.\nprint('Add fetched number to another number:',\n ee.Number(list.get(1)).add(2).getInfo())\n```"]]
