Invalid argument for ee.Reducer()

I was trying to implement the Statistics of an Image Region example shown here using the python bindings like so:

image = ee.Image('LANDSAT/LE7_TOA_5YEAR/2008_2012')

region = (ee.Feature(ee.FeatureCollection(
  'ft:1Ec8IWsP8asxN-ywSqgXWMuBaxI6pPaeh6hC64lA')
  .filter(ee.Filter.eq('G200_REGIO', 'Sierra Nevada Coniferous Forests'))
  .first())
         )

meanDictionary = (image.reduceRegion(
    {
        'reducer': ee.Reducer.mean(),
        'geometry': region.geometry().getInfo(),
        'scale': 30,
        'maxPixels': 1e9
    }
)
                 )
print(meanDictionary)

However, I run into the following error:

---------------------------------------------------------------------------
EEException                               Traceback (most recent call last)
<ipython-input-135-ee40bb553fd6> in <module>
     12         'geometry': region.geometry().getInfo(),
     13         'scale': 30,
---> 14         'maxPixels': 1e9
     15     }
     16 )

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/apifunction.py in <lambda>(*args, **kwargs)
    201         def MakeBoundFunction(func):
    202           # We need the lambda to capture "func" from the enclosing scope.
--> 203           return lambda *args, **kwargs: func.call(*args, **kwargs)  # pylint: disable=unnecessary-lambda
    204         bound_function = MakeBoundFunction(api_func)
    205 

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in call(self, *args, **kwargs)
     65       to that type.
     66     """
---> 67     return self.apply(self.nameArgs(args, kwargs))
     68 
     69   def apply(self, named_args):

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in apply(self, named_args)
     78       to that type.
     79     """
---> 80     result = computedobject.ComputedObject(self, self.promoteArgs(named_args))
     81     return Function._promoter(result, self.getReturnType())
     82 

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in promoteArgs(self, args)
    105       name = spec['name']
    106       if name in args:
--> 107         promoted_args[name] = Function._promoter(args[name], spec['type'])
    108       elif not spec.get('optional'):
    109         raise ee_exception.EEException(

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/__init__.py in _Promote(arg, klass)
    261     else:
    262       # Client-side cast.
--> 263       return cls(arg)
    264   else:
    265     return arg

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/computedobject.py in __call__(cls, *args, **kwargs)
     30       return args[0]
     31     else:
---> 32       return type.__call__(cls, *args, **kwargs)
     33 
     34 

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/__init__.py in init(self, *args)
    377           raise EEException(
    378               'Invalid argument for ee.%s(): %s.  Must be a ComputedObject.' %
--> 379               (name, args))
    380         else:
    381           result = args[0]

EEException: Invalid argument for ee.Reducer(): ({'reducer': <ee.Reducer object at 
0x10dce9048>, 'geometry': {'type': 'Polygon', 'coordinates': [[[-121.6945185, 40.9321107],
 [-121.7223286, 40.9163108], [-121.7813795, 40.8940183], [-121.80290249999997, 
40.8794994], [-121.83342760000004, 40.853044700000005], 

...

[-121.65048249999998, 40.9200639], [-121.6557616, 40.9302528], [-121.65774560000001,
 40.935650900000006], [-121.6945185, 40.9321107]]]}, 'scale': 30, 'maxPixels': 
1000000000.0},).  Must be a ComputedObject.

The region geometry is a dictionary with coordinates for a polygon. I couldn’t seem to figure out the issue in looking through the code. Any suggestions would be appreciated.

Thanks

[gorelick]

You don’t call python functions with a dictionary, you use regular python keywords:

image.reduceRegion( reducer= ee.Reducer.mean(), geometry= region.geometry().getInfo(), scale= 30, maxPixels= 1e9 )

On Mon, Apr 22, 2019 at 10:36 PM CarpeFridiem [e-mail] wrote:

I was trying to implement the Statistics of an Image Region example shown here https://developers.google.com/earth-engine/reducers_reduce_region using the python bindings like so:

image = ee.Image(‘LANDSAT/LE7_TOA_5YEAR/2008_2012’)

region = (ee.Feature(ee.FeatureCollection( ‘ft:1Ec8IWsP8asxN-ywSqgXWMuBaxI6pPaeh6hC64lA’) .filter(ee.Filter.eq(‘G200_REGIO’, ‘Sierra Nevada Coniferous Forests’)) .first()) )

meanDictionary = (image.reduceRegion( { ‘reducer’: ee.Reducer.mean(), ‘geometry’: region.geometry().getInfo(), ‘scale’: 30, ‘maxPixels’: 1e9 } ) ) print(meanDictionary)

However, I run into the following error:

---

EEException Traceback (most recent call last) <ipython-input-135-ee40bb553fd6> in <module> 12 ‘geometry’: region.geometry().getInfo(), 13 ‘scale’: 30, —> 14 ‘maxPixels’: 1e9 15 } 16 )

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/apifunction.py in <lambda>(*args, **kwargs) 201 def MakeBoundFunction(func): 202 # We need the lambda to capture “func” from the enclosing scope. –> 203 return lambda *args, **kwargs: func.call(*args, **kwargs) # pylint: disable=unnecessary-lambda 204 bound_function = MakeBoundFunction(api_func) 205

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in call(self, *args, **kwargs) 65 to that type. 66 “”" —> 67 return self.apply(self.nameArgs(args, kwargs)) 68 69 def apply(self, named_args):

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in apply(self, named_args) 78 to that type. 79 “”" —> 80 result = computedobject.ComputedObject(self, self.promoteArgs(named_args)) 81 return Function._promoter(result, self.getReturnType()) 82

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/function.py in promoteArgs(self, args) 105 name = spec[‘name’] 106 if name in args: –> 107 promoted_args[name] = Function._promoter(args[name], spec[‘type’]) 108 elif not spec.get(‘optional’): 109 raise ee_exception.EEException(

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/init.py in _Promote(arg, klass) 261 else: 262 # Client-side cast. –> 263 return cls(arg) 264 else: 265 return arg

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/computedobject.py in call(cls, *args, **kwargs) 30 return args[0] 31 else: —> 32 return type.call(cls, *args, **kwargs) 33 34

~/miniconda3/envs/google_earth_engine/lib/python3.6/site-packages/ee/init.py in init(self, *args) 377 raise EEException( 378 ‘Invalid argument for ee.%s(): %s. Must be a ComputedObject.’ % –> 379 (name, args)) 380 else: 381 result = args[0]

EEException: Invalid argument for ee.Reducer(): ({‘reducer’: <ee.Reducer object at 0x10dce9048>, ‘geometry’: {‘type’: ‘Polygon’, ‘coordinates’: [[[-121.6945185, 40.9321107], [-121.7223286, 40.9163108], [-121.7813795, 40.8940183], [-121.80290249999997, 40.8794994], [-121.83342760000004, 40.853044700000005],

…

[-121.65048249999998, 40.9200639], [-121.6557616, 40.9302528], [-121.65774560000001, 40.935650900000006], [-121.6945185, 40.9321107]]]}, ‘scale’: 30, ‘maxPixels’: 1000000000.0},). Must be a ComputedObject.

The region geometry is a dictionary with coordinates for a polygon. I couldn’t seem to figure out the issue in looking through the code. Any suggestions would be appreciated.

Thanks

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/google/earthengine-api/issues/87, or mute the thread https://github.com/notifications/unsubscribe-auth/ACH4H5U65PRRXFIGSMV5M6LPRYOVRANCNFSM4HHSPJFA .

– Noel Gorelick ([e-mail])

[jon-holt]

Do this to print the value:

result = image.reduceRegion(...)

result.getInfo()