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ee.String.getInfo
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Recupera il valore di questo oggetto dal server.
Se non viene fornita alcuna funzione di callback, la richiesta viene eseguita in modo sincrono. Se viene fornita una funzione di callback, la richiesta viene effettuata in modo asincrono.
La modalità asincrona è preferita perché la modalità sincrona interrompe tutto il resto del codice (ad esempio, la UI dell'editor di codice EE) durante l'attesa del server. Per effettuare una richiesta asincrona, è preferibile utilizzare evaluate() anziché getInfo().
Restituisce il valore calcolato di questo oggetto.
| Utilizzo | Resi |
|---|
String.getInfo(callback) | Oggetto |
| Argomento | Tipo | Dettagli |
|---|
questo: computedobject | ComputedObject | L'istanza ComputedObject. |
callback | Funzione, facoltativa | Un callback facoltativo. Se non viene fornito, la chiamata viene effettuata in modo sincrono. |
Esempi
Editor di codice (JavaScript)
// After getInfo(), the instance is a local JavaScript string.
// Regular JavaScript string manipulations are then available.
//
// Note: getInfo() fetches results from Earth Engine immediately, and may freeze
// the browser or lead to poor performance. Use evaluate() to avoid this.
print(ee.String('abc').getInfo().charAt(1)); // b
print(ee.String('abc').getInfo()[2]); // c
// Using + with ee.String has unexpected results
print(ee.String('abc') + 'def'); // ee.String("abc")def
// Fetch string using getInfo
print(ee.String('abc').getInfo() + 'def'); // abcdef
// Improved solution: cat is available on ee.String
print(ee.String('abc').cat('def')); // abcdef
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)
# After getInfo(), the instance is a local Python string.
# Regular Python string manipulations are then available.
# Note: getInfo() fetches results from Earth Engine synchronously;
# later expressions will not be evaluated until it completes.
print(ee.String('abc').getInfo()[-2]) # b
print(ee.String('abc').getInfo()[2]) # c
# Fetch string using getInfo
print(ee.String('abc').getInfo() + 'def') # abcdef
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\u003egetInfo()\u003c/code\u003e retrieves the value of a ComputedObject (like an \u003ccode\u003eee.String\u003c/code\u003e) from the Earth Engine server and returns it as a native object (like a JavaScript string or Python string).\u003c/p\u003e\n"],["\u003cp\u003eRequests can be synchronous (blocking) or asynchronous (non-blocking) depending on whether a callback function is provided.\u003c/p\u003e\n"],["\u003cp\u003eSynchronous requests (without a callback) can freeze the UI or cause poor performance; using \u003ccode\u003eevaluate()\u003c/code\u003e for asynchronous operations is generally preferred.\u003c/p\u003e\n"],["\u003cp\u003eAfter using \u003ccode\u003egetInfo()\u003c/code\u003e, you can apply regular string operations of the respective language (JavaScript/Python) on the returned object.\u003c/p\u003e\n"]]],[],null,["# ee.String.getInfo\n\n\u003cbr /\u003e\n\nRetrieves the value of this object from the server.\n\n\u003cbr /\u003e\n\nIf no callback function is provided, the request is made synchronously. If a callback is provided, the request is made asynchronously.\n\nThe asynchronous mode is preferred because the synchronous mode stops all other code (for example, the EE Code Editor UI) while waiting for the server. To make an asynchronous request, evaluate() is preferred over getInfo().\n\nReturns the computed value of this object.\n\n| Usage | Returns |\n|--------------------------------|---------|\n| String.getInfo`(`*callback*`)` | Object |\n\n| Argument | Type | Details |\n|------------------------|--------------------|------------------------------------------------------------------------|\n| this: `computedobject` | ComputedObject | The ComputedObject instance. |\n| `callback` | Function, optional | An optional callback. If not supplied, the call is made synchronously. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// After getInfo(), the instance is a local JavaScript string.\n// Regular JavaScript string manipulations are then available.\n//\n// Note: getInfo() fetches results from Earth Engine immediately, and may freeze\n// the browser or lead to poor performance. Use evaluate() to avoid this.\n\nprint(ee.String('abc').getInfo().charAt(1)); // b\nprint(ee.String('abc').getInfo()[2]); // c\n\n// Using + with ee.String has unexpected results\nprint(ee.String('abc') + 'def'); // ee.String(\"abc\")def\n\n// Fetch string using getInfo\nprint(ee.String('abc').getInfo() + 'def'); // abcdef\n\n// Improved solution: cat is available on ee.String\nprint(ee.String('abc').cat('def')); // abcdef\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# After getInfo(), the instance is a local Python string.\n# Regular Python string manipulations are then available.\n\n# Note: getInfo() fetches results from Earth Engine synchronously;\n# later expressions will not be evaluated until it completes.\n\nprint(ee.String('abc').getInfo()[-2]) # b\nprint(ee.String('abc').getInfo()[2]) # c\n\n# Fetch string using getInfo\nprint(ee.String('abc').getInfo() + 'def') # abcdef\n```"]]
