json to python class example

json-to-class.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import json
import os.path

def md5sum():
    return "test"

class File(object):
    def __init__(self, md5=None, filename=None):
        self.md5 = md5 or md5sum()
        self.filename = os.path.basename(filename)

    def __str__(self):
        return "File(md5={}, filename={})".format(self.md5, self.filename)

    @classmethod
    def from_json(cls, md5, filename):
        return cls(md5=md5, filename=filename)

    def to_json(self):
        return {
            "MD5": self.md5,
            "Filename": self.filename,
        }

    def __eq__(self, other):
        return self.filename == other.filename

string = """[{"MD5": "3123", "Filename": "test"}]"""
json_items = json.loads(string)
print(json_items)

print("convert json list to list of File")
#items = []
#for i in json_items:
#    items.append(File.from_json(md5=i["MD5"], filename=i["Filename"]))
items = [File.from_json(md5=i["MD5"], filename=i["Filename"]) for i in json_items]
del(json_items)
print(items)

print("create new test File objects")
f = File(filename="test")
f2 = File(filename="test")
print(f)
print(f == f2)

print("check if f in items")
print(f in items)
items.remove(f)
print(items)