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ee.Dictionary.contains

AI-generated Key Takeaways

The Dictionary.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.

Usage	Returns
`Dictionary. contains (key)`	Boolean

Argument	Type	Details
this: `dictionary`	Dictionary
`key`	String

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 
 ( 
 '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 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 
 }) 
 display 
 ( 
 'Dictionary contains key "B1"?:' 
 , 
 dic 
 . 
 contains 
 ( 
 'B1' 
 )) 
 display 
 ( 
 'Dictionary contains key "Band_1"?:' 
 , 
 dic 
 . 
 contains 
 ( 
 'Band_1' 
 ))

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AI-generated Key Takeaways

Examples

Code Editor (JavaScript)

Colab (Python)

ee.Dictionary.contains