(CkPython) 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
          
	}
}

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import sys
import chilkat

json = chilkat.CkJsonObject()
json.put_EmitCompact(False)

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

# First navigate to the "sampleData" object:
# sampleData is a CkJsonObject
sampleData = json.ObjectOf("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())