Serialize the @property methods in a Python class

Serialize the @property methods in a Python class

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Serialize the @property methods in a Python class
Tag : python , By : user107506
Date : January 02 2021, 06:48 AM

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Prevent overriding property for class methods in Python?

Tag : python , By : ziqew
Date : March 29 2020, 07:55 AM
this one helps. I suppose this stops developers from accidentally overwriting Test's spam property. Is that why you want this? I not sure that is a good idea (what if a developer wants to override the spam property? why throw up roadblocks?), but...
You could use a metaclass. If you don't supply a setter for the metaclass's property, then Test.spam will raise an AttributeError:
class MetaTest(type):
    def spam(cls):
        return cls._spam

class Test(object):
    _spam = 42

    def get_spam(cls):

    def set_spam(cls, value):
        cls._spam = value

    spam = property(get_spam, set_spam)

print Test.spam
# 42
Test.spam = 24
AttributeError: can't set attribute

JSON serialize a class and change property casing with Python

Tag : python , By : Richard
Date : March 29 2020, 07:55 AM
Hope that helps You just need to create a function to transform the snake_case keys to camelCase. You can easily do that using .split, .lower, and .title.
import json

class HardwareProfile:
    def __init__(self, vm_size):
        self.vm_size = vm_size
        self.some_other_thing = 42
        self.a = 'a'

def snake_to_camel(s):
    a = s.split('_')
    a[0] = a[0].lower()
    if len(a) > 1:
        a[1:] = [u.title() for u in a[1:]]
    return ''.join(a)

def serialise(obj):
    return {snake_to_camel(k): v for k, v in obj.__dict__.items()}

hp = HardwareProfile('Large')
print(json.dumps(serialise(hp), indent=4, default=serialise))
    "vmSize": "Large",
    "someOtherThing": 42,
    "a": "a"

How to access methods and attributes in derived property class in python

Tag : python , By : user183954
Date : March 29 2020, 07:55 AM
Any of those help
How do I access the method "get_memvervalues" or the attributes _name, _tooltip etc?
a = myclass()
desc = type(a).__dict__['data']

print(desc.get_membervalues())    # {
                                  #     'name': 'data', 
                                  #     'cls_name': 'AnotherClass', 
                                  #     'tooltip': 'help'
                                  # }

print(desc._tooltip)              # help

print(vars(desc))                 # {
                                  #     '_name': 'data',
                                  #     '_value': 4,
                                  #     '_cls_name': 'AnotherClass', 
                                  #     '_datatype': <class 'int'>, 
                                  #     '_tooltip': 'help', 
                                  #     '_kwargs': {}
                                  # }
a = myclass()
b = myclass()

print("Before:")        # Before:
print("a:", a.data)     # a: 4
print("b:", b.data)     # b: 4

a.data = 10

print("After:")         # After:
print("a:", a.data)     # a: 10
print("b:", b.data)     # b: 10   (!!!)
type(a).__dict__['data'] is type(b).__dict__['data']

How to apply class methods to my own class' property in Python

Tag : python , By : pad
Date : March 29 2020, 07:55 AM
Hope that helps Your class should inherit from pygame.Rect. That is the only way to get the Rect methods automatically. However by doing this you will inherits also the int typecasting of the coordinates since that is in the original implementation of pygame.Rect. I'm afraid inheritance won't solve your problem.
You know what the Rect methods are supposed to do (The documentation is well written), so I'm afraid the only way is to reimplement them (or at least reimplement those you need) for your own Thing class, to mimic the Rect behaviour with float numbers.
class FlRect:
    """Similar to pygame.Rect but uses float numbers.

    The class stores internally only coordinates, width and height.
    Other attributes are rendered through properties, with getter and setter:
    x, y: coordinates of the top-left corner of the rectangle.
    top, bottom: y coordinates of the top and bottom edges respectively.
    left, right: x coordinates of the left and right edges respectively.
    centerx, centery: coordinates of the centre of the rectangle.
    width, height: self-explanatory. 

    def __init__(self, x, y, w, h):

        x, y - coordinates of top-left corner of the rectangle
        w, h - width and height
        self._x = x
        self._y = y
        self._w = w
        self._h = h

    def x(self):
        return self._x

    def x(self, value):
        self._x = value

    def y(self):
        return self._y

    def y(self, value):
        self._y = value

    def width(self):
        return self._w

    def width(self, value):
        self._w = value

    def height(self):
        return self._h

    def height(self, value):
        self._h = value

    def top(self):
        return self._y

    def top(self, value):
        self._y = value

    def bottom(self):
        return self._y + self._h

    def bottom(self, value):
        self._y = value - self._h

    def left(self):
        return self._x

    def left(self, value):
        self._x = value

    def right(self):
        return self._x + self._w

    def right(self, value):
        self._x = value - self._w

    def centerx(self):
        return self._x + (self._w / 2)

    def centerx(self, value):
        self._x = value - (self._w / 2)

    def centery(self):
        return self._y + (self._h / 2)

    def centery(self, value):
        self._h = value - (self._h / 2)

    def get_rect(self):
        """Return a pygame.Rect object with rounded coordinates"""
        return Rect(round(self._x), round(self._y), round(self._w), round(self._h))

list @property decorated methods in a python class

Tag : python , By : user179445
Date : March 29 2020, 07:55 AM
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