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ee.Dictionary.contains

  • TheDictionary.contains(key) method checks if a dictionary includes a specific key.

  • It takes the dictionary and the key (as a string) as arguments and returns a boolean value.

  • Examples in both JavaScript and Python demonstrate how to use the method and interpret the boolean output.

 Returns true if the dictionary contains the given key.

UsageReturns
Dictionary.contains(key)Boolean
ArgumentTypeDetails
this:dictionaryDictionary
keyString

Examples

Code Editor (JavaScript)

// A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).vardict=ee.Dictionary({B1:182,B2:219,B3:443});print('Dictionary contains key "B1"?',dict.contains('B1'));print('Dictionary contains key "Band_1"?',dict.contains('Band_1'));

Python setup

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

importeeimportgeemap.coreasgeemap

Colab (Python)

# A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).dic=ee.Dictionary({'B1':182,'B2':219,'B3':443})display('Dictionary contains key "B1"?:',dic.contains('B1'))display('Dictionary contains key "Band_1"?:',dic.contains('Band_1'))

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Last updated 2024-06-05 UTC.