Implementation of MVC Design Pattern in Python3 - python-3.x

Question

I am trying to implement MVC using Python3.8. I have used this https://www.tutorialspoint.com/python_design_patterns/python_design_patterns_model_view_controller.htm Python2's example for practice.
But, I am receiving the following error:
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
My code is as following:
model.py
import json
class Person:
def __init__(self, first = None, last = None):
self.first = first
self.last = last
def name(self):
return ('%s %s' %(self.first, self.last))
#classmethod
def getAll(self):
database = open('data.txt', 'r')
result = []
jsonList = json.loads(database.read())
for item in jsonList:
item = json.loads(item)
person = Person(item['first'], item['last'])
result.append(person)
return result
view.py
from model import Person
def showAllView(list):
print ('In our db we have %i users. Here they are:' % len(list))
for item in list:
print (item.name())
def startView():
print ('MVC - the simplest example')
print ('Do you want to see everyone in my db?[y/n]')
def endView():
print ('Goodbye!')
controller.py
from model import Person
import view
def showAll():
#gets list of all Person objects
people_in_db = Person.getAll()
return view.showAllView(people_in_db)
def start():
view.startView()
answer = input('Enter y or n')
if answer == 'y':
return showAll()
else:
return view.endView()
if __name__ == "__main__":
start()
Data.txt
[{
"first": "abc",
"last": "xyz"
}]
Please, guide me in this and help me find the error. Thanks in advance.

Answer 1

I have solved the problem myself. The main problem was loading JSON elements twice in model.py, like below:
jsonList = json.loads(database.read())
for item in jsonList:
item = json.loads(item)
Now I have solved it by removing item = json.loads(item).