I am now trying to display the information I got using Describe. For some reason, I keep getting error message saying `Key error: 'pixelType.'`. I have no idea why this gives me the error because this is exactly how it is worded in ArcGIS help website. Could someone please tell me what is wrong? 

```
def data_report(workspace):

elements = defaultdict(list)

walk = arcpy.da.Walk(workspace, topdown=True)

for dirpath, dirnames, filenames in walk:
    for dirname in dirnames:  # 'FeatureDataset'
        desc = arcpy.da.Describe(os.path.join(dirpath, dirname))
        elements[desc['dataType']].append(desc)

    for filename in filenames:
        desc = arcpy.da.Describe(os.path.join(dirpath, filename))
        elements[desc['dataType']].append(desc)  

report = []

for element_type, element_list in elements.items():
    report += [f"{element_type}:"]
    for element_description in element_list:

if element_type == "RasterDataset":    
    report +=  [f"\t\t{element_description['name']}"]
    report +=  [f"\t\t\t\tThe number of band: {element_description['bandCount']}"]
    report +=  [f"\t\t\t\tThe format: {element_description['format']}"]
    report +=  [f"\t\t\t\tPixel type: {element_description['pixelType']}"]

```