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(Chilkat2-Python) Check if Integer Exists at JSON Path

Demonstrates how to get an integer value at a JSON path, and how to check to see if it exists.

Chilkat2 Python Downloads

install with pip

pip3 install chilkat2

or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import chilkat2

json = chilkat2.JsonObject()

# First build simple JSON..
json.UpdateInt("test.abc",100)

json.EmitCompact = False
print(json.Emit())

# This is our JSON:
# {
#   "test": {
#     "abc": 100,
#   }
# }

path = "test.notHere"

# The call to IntOf will return 0, because it's not present.
# But how do we know if it really was present, and the value was truly 0?
val = json.IntOf(path)
print("val = " + str(val))

# We cannot use LastMethodSuccess because LastMethodSuccess only applies
# to methods that:
# - return a string
# - return a new Chilkat object, binary bytes, or a date/time.
# - returns a boolean status where True = success and False = failed.
# - returns an integer where failure is defined by a return value less than zero.
# The IntOf method fits none of these requirements, and therefore the LastMethodSuccess 
# is not a valid indicator..
wasFound = json.LastMethodSuccess
print("wasFound = " + str(wasFound) + " (not a valid indicator)")

# Instead, if the returned value is 0, we can double-check to see if the member was truly there..
if (val == 0):
    wasFound = json.HasMember(path)
    print("wasFound = " + str(wasFound))
    if (wasFound == True):
        print("The value was present and is 0.")
    else:
        print("no member is present at test.notHere")

else:
    print("val = " + str(val))

# Alternatively, you could check to see if the member exists beforehand..
if (json.HasMember(path) == True):
    print("val = " + str(json.IntOf(path)))
else:
    print("no member at " + path)


 

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