Sampling list of rasters in ArcPy?

Question

I've been trying several times to sample (Sample tool from Spatial Analysis ArcGis 10.5.1) a list of rasters to a location sample (also in raster format .tif).

Here's the code I've been using, and apparently the problem raised up when Python execute the line of the tool - it creates well all the files in the specified folder:

import arcpy, os, sys, string
from arcpy import env
from arcpy.sa import *

arcpy.env.workspace = r'C:\Users\Victoria\Desktop\***\***'
inputFolder = arcpy.env.workspace
outputFolder = os.path.join(inputFolder, "sample")

raster = arcpy.ListRasters('*br*')
colony = arcpy.ListRasters('*col_1*')

for r in raster:
    outName = os.path.splitext(r)[0] + "_col1"
    saveDir = os.path.join(outputFolder, outName)
    Sample(r, colony, saveDir, "NEAREST", "Value", "CURRENT_SLICE")
    print '{0} saved in {1}.'.format(outName, saveDir)

And here's the error that shows up after run the code:

    Traceback (most recent call last):
  File "C:\Python27\ArcGIS10.5\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 326, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Users\Victoria\Desktop\***\***\prueba1.py", line 15, in <module>
    proc = Sample(r, colony, saveDir, "NEAREST", "Value", "CURRENT_SLICE")
  File "C:\Program Files\ArcGIS\Desktop10.5\ArcPy\arcpy\sa\Functions.py", line 1617, in Sample
    process_as_multidimensional)
  File "C:\Program Files\ArcGIS\Desktop10.5\ArcPy\arcpy\sa\Utils.py", line 53, in swapper
    result = wrapper(*args, **kwargs)
  File "C:\Program Files\ArcGIS\Desktop10.5\ArcPy\arcpy\sa\Functions.py", line 1609, in Wrapper
    process_as_multidimensional)
  File "C:\Program Files\ArcGIS\Desktop10.5\ArcPy\arcpy\geoprocessing\_base.py", line 510, in <lambda>
    return lambda *args: val(*gp_fixargs(args, True))
RuntimeError: Object: Error in executing tool

I'm really new in this.

Answer 1

As commented by @BERA:

When you do for r in rasters, r will be a single raster. If Sample wants a list of rasters and you are inputing one raster (r) it will not work.