The input is a list and the output is in the form of a nested dictionary in a list - json

Question

Input:
input_list=['1.exe','2.exe','3.exe','4.exe']
Output format:
out_dict=[{'name':'1.exe',
'children':[{'name':'2.exe',
'children':[{'name':'3.exe
'children':[{'name':'4.exe'}]}}}]
The input is the a list as above mentioned and we have to obtain the output in the format as mentioned in the above lines.
I tried using nested for loops but it isn't working. How can we implement JSON in this?

Answer 1

input_list=['1.exe','2.exe','3.exe','4.exe']
def split(data):
try:
first_value = data[0]
data = [{'name': first_value, 'children': split(data[1:])} if split(data[1:]) != [] else {'name': first_value}]
return data
except:
return data
print (split(input_list))
output:
[{'name': '1.exe', 'children':
[{'name': '2.exe', 'children':
[{'name': '3.exe', 'children':
[{'name': '4.exe'}]}]}]}]
code which is a little bit more easier to understand (with explinations):
input_list=['1.exe','2.exe','3.exe','4.exe']
def split(input_list):
if len(input_list) == 0:
return input_list # if there is no data return empty list
else: # if we have elements
first_value = input_list[0] # first value
if split(input_list[1:]) != []: # data[1:] will return a list with all values except the first value
input_list = [{'name':first_value ,'children': split(input_list[1:])}]
return input_list # return after the last recursion is called
else:
input_list = [{'name': first_value}]
return input_list
print (split(input_list))
output:
[{'name': '1.exe', 'children':
[{'name': '2.exe', 'children':
[{'name': '3.exe', 'children':
[{'name': '4.exe'}]}]}]}]
or:
input_list=['1.exe','2.exe','3.exe','4.exe']
def split(input_list):
if input_list:
head, *tail = input_list # This is a nicer way of doing head, tail = data[0], data[1:]
if split(tail) != []:
return [{'name': head, 'children':split(tail)}]
else:
return [{'name': head}]
else:
return {}
print (split(input_list))
Convert from Python to JSON:
import json
# a Python object (dict):
x = {
"name": "John",
"age": 30,
"city": "New York"
}
# convert into JSON:
y = json.dumps(x)
# the result is a JSON string:
print(y)
JSON is a syntax for storing and exchanging data. Convert from Python
to JSON If you have a Python object, you can convert it into a JSON
string by using the json.dumps() method.
import json
input_list=['1.exe','2.exe','3.exe','4.exe']
def split(input_list):
try:
first_value = input_list[0]
input_list = {'name': first_value, 'children': split(input_list[1:])} if split(input_list[1:]) != [] else {'name': first_value}
return input_list
except:
return input_list
data = split(input_list)
print (json.dumps(data))