ee.Dictionary.keys

  • Dictionary.keys() retrieves all keys from a given dictionary and returns them as a list sorted in natural order.

  • This function is applicable to dictionaries in both JavaScript and Python environments within the Earth Engine context.

  • The returned list can be printed or used in further operations within your Earth Engine scripts.

 Retrieve the keys of a dictionary as a list. The keys will be sorted in natural order.

UsageReturns
Dictionary.keys()List
ArgumentTypeDetails
this: dictionaryDictionary

Examples

Code Editor (JavaScript)

// A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).
var dict = ee.Dictionary({
  B1: 182,
  B2: 219,
  B3: 443
});

print('The list of dictionary keys', dict.keys());

Python setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

import ee
import geemap.core as geemap

Colab (Python)

# A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).
dic = ee.Dictionary({
    'B1': 182,
    'B2': 219,
    'B3': 443
})

print('The list of dictionary keys:', dic.keys().getInfo())