In python, How to print dictionary value based on another value? : How to print the string of "value" only for id: "resolution" ??

Here in this case I want to print the value "Fixed"

    customFields: {
     string: [
     {
     id: "device_type",
     value: "iPhone 6"
     },
     {
     id: "os_version",
     value: "iOS 10.x"
     },
     {
     id: "rabbit_build",
     value: "2.11.llyu"
     },
     {
     id: "resolution",
     value: "Fixed"
     },


My Python code is 

    resolution = ib['customFields']['string']
    print(resolution)