(Chilkat2-Python) JSON: Miscellaneous Operations

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

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()
json.EmitCompact = False

# Assume the file contains the data as shown above..
success = json.LoadFile("qa_data/json/sample2.json")
if (success == False):
    print(json.LastErrorText)
    sys.exit()

# Get the "sampleData" object:
sampleData = chilkat2.JsonObject()
json.ObjectOf2("sampleData",sampleData)

# Demonstrate BoolAt and BoolOf
print("hungry: " + str(sampleData.BoolOf("hungry")))
print("hungry: " + str(sampleData.BoolAt(2)))

# StringOf returns the value as a string regardless of it's actual type:
print("pi: " + sampleData.StringOf("pi"))
print("answer: " + sampleData.StringOf("answer"))
print("withoutValue: " + sampleData.StringOf("withoutValue"))
print("hungry: " + sampleData.StringOf("hungry"))

# Demonstrate IsNullOf / IsNullAt
print("withoutValue is null? " + str(sampleData.IsNullOf("withoutValue")))
print("withoutValue is null? " + str(sampleData.IsNullAt(3)))
print("apple is null? " + str(sampleData.IsNullOf("apple")))
print("apple is null? " + str(sampleData.IsNullAt(1)))

# IntOf
print("answer: " + str(sampleData.IntOf("answer")))

# SetNullAt, SetNullOf
# Set "pi" to null
success = sampleData.SetNullAt(0)
# Set "answer" to null
success = sampleData.SetNullOf("answer")

# Show the changes:
print(json.Emit())

# Restore pi and apple:
success = sampleData.SetNumberAt(0,"3.14")
success = sampleData.SetNumberOf("answer","42")

# Show the changes:
print(json.Emit())

# Add a null value named "afterApple" just after "apple"
success = sampleData.AddNullAt(2,"afterApple")

# Add a boolean value just after "pi"
success = sampleData.AddBoolAt(1,"afterPi",False)

# Examine the changes..
print(json.Emit())