(Chilkat2-Python) Get the Index of a JSON Member

This example demonstrates how to get the index of a given member by name.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS

import sys
import chilkat2

success = False

json = chilkat2.JsonObject()

# This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars).
# The presence of whitespace chars for pretty-printing makes no difference to the Load
# method. 
jsonStr = "{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}"

success = json.Load(jsonStr)
if (success == False):
    print(json.LastErrorText)
    sys.exit()

# The top-level JSON object has three members: name, image, and thumbnail.
nameIndex = json.IndexOf("name")
# The index of the "name" member is 0.
print("nameIndex = " + str(nameIndex))

thumbIndex = json.IndexOf("thumbnail")
# The index of the "thumbnail" member is 2.
print("thumbIndex = " + str(thumbIndex))

# The "fname" member is NOT a direct member of the top-level JSON object.
# It is a member of a nested object.  If we try to get the index of this
# member using the top-level JSON object, it is not found (and returns -1).
fnameIndex = json.IndexOf("fname")
# The fnameIndex is -1 (not found).  This is correct.
print("fnameIndex = " + str(fnameIndex))

# Get the "image" object.
imageObj = chilkat2.JsonObject()
json.ObjectOf2("image",imageObj)

# Now we can get the index of the "fname" object, because it is a direct
# member of the "image" object:
fnameIndex = imageObj.IndexOf("fname")
print("fnameIndex = " + str(fnameIndex))