{
    "fieldName": "test",
    "fieldType": "String",
    "calExpression": "isSame( ]oldclass] , ]newclass] )",
    "defFunction": "def isSame(x,y): 
    \tfielda=str(x)
    \tfieldb=str(y)
    \tif fielda == fieldb:
    \t\treturn 1
    \telse:
    \t\treturn 0"
}