ncopiy

class JSONTextFieldFilter(Filter):
    json_field_name = ""
    choices = {}

    def __init__(self, json_field_name=None, choices=None, **kwargs):
        self.choices = choices if choices else {}
        self.json_field_name = json_field_name if json_field_name else ""
        super().__init__(**kwargs)

    def modify_value(self, value):

ncopiy

class defaultattr:
    def __init__(self, expected_type):
        self.expected_type = expected_type

    def __getattr__(self, expected_type):
        if isinstance(self.expected_type, type):
            return self.expected_type()
        return self.expected_type

ncopiy

import copy
from collections import Mapping

from rest_framework import serializers
from rest_framework.fields import SkipField
from rest_framework.relations import PKOnlyObject


def dict_merge(dct, merge_dct):
    """ Recursive dict merge. Inspired by :meth:``dict.update()``, instead of

ncopiy

import functools
import sys
import re
from django.conf import settings
from django.db import connection

def shrink_select(sql):
    return re.sub("^SELECT(.+)FROM", "SELECT .. FROM", sql)

def shrink_update(sql):

ncopiy

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!