Let us see how to convert a given nested dictionary into an object
Method 1 : Using the json module. We can solve this particular problem by importing the json module and use a custom object hook in the json.loads() method.
# importing the module import json
# declaringa a class class obj:
# constructor
def __init__( self , dict1):
self .__dict__.update(dict1)
def dict2obj(dict1):
# using json.loads method and passing json.dumps
# method and custom object hook as arguments
return json.loads(json.dumps(dict1), object_hook = obj)
# initializing the dictionary dictionary = { 'A' : 1 , 'B' : { 'C' : 2 },
'D' : [ 'E' , { 'F' : 3 }], 'G' : 4 }
# calling the function dict2obj and # passing the dictionary as argument obj1 = dict2obj(dictionary)
# accessing the dictionary as an object print (obj1.A)
print (obj1.B.C)
print (obj1.D[ 0 ])
print (obj1.D[ 1 ].F)
print (obj1.G)
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1 2 E 3 4
Time complexity: O(n), where n is the total number of elements in the input dictionary.
Auxiliary space: O(n), where n is the total number of elements in the input dictionary
Method 2: Using the isinstance() method
We can solve this particular problem by using the isinstance() method which is used to check whether an object is an instance of a particular class or not.
def dict2obj(d):
# checking whether object d is a
# instance of class list
if isinstance (d, list ):
d = [dict2obj(x) for x in d]
# if d is not a instance of dict then
# directly object is returned
if not isinstance (d, dict ):
return d
# declaring a class
class C:
pass
# constructor of the class passed to obj
obj = C()
for k in d:
obj.__dict__[k] = dict2obj(d[k])
return obj
# initializing the dictionary dictionary = { 'A' : 1 , 'B' : { 'C' : 2 },
'D' : [ 'E' , { 'F' : 3 }], 'G' : 4 }
# calling the function dict2obj and # passing the dictionary as argument obj2 = dict2obj(dictionary)
# accessing the dictionary as an object print (obj2.A)
print (obj2.B.C)
print (obj2.D[ 0 ])
print (obj2.D[ 1 ].F)
print (obj2.G)
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1 2 E 3 4