A python script snippet to quickly get the extent of polygon feature(s)

GetFeatureExtent.py

import arcpy

LAYER_NAME="Your layer name"
FIELD_NAME="Your field name"
shapeFieldName = arcpy.Describe(LAYER_NAME).shapeFieldName
rows = arcpy.SearchCursor(LAYER_NAME)

for row in rows:
    fieldValue = row.getValue(FIELD_NAME).strip()
    feat = row.getValue(shapeFieldName)
    extent = feat.extent
    print "'{0}' : {{ 'xmin':{1}, 'ymin':{2}, 'xmax':{3}, 'ymax':{4} }},"
            .format(fieldValue, extent.XMin, extent.YMin, extent.XMax, extent.YMax)