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comyn
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property_classmethod.ipynb
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‎property_classmethod.ipynb‎

Lines changed: 370 additions & 0 deletions
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 6,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"class Property:\n",
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" def __init__(self, fget=None, fset=None, fdel=None):\n",
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" self.fget = fget\n",
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" self.fset = fset\n",
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" self.fdel = fdel\n",
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" \n",
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" def __get__(self, instance, cls):\n",
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" if self.fget is not None:\n",
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" return self.fget(instance)\n",
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" else:\n",
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" raise AttributeError('property not define getter')\n",
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" \n",
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" def __set__(self, instance, value):\n",
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" if self.fset is not None:\n",
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" self.fset(instance, value)\n",
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" else:\n",
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" raise AttributeError('property not define setter')\n",
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" \n",
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" def __delete__(self, instance):\n",
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" if self.fdel is not None:\n",
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" self.fdel(instance)\n",
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" else:\n",
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" raise AttributeError('property not define deleter')\n",
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" \n",
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" def setter(self, fset):\n",
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" self.fset = fset"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"Spam.x.__get__(spam, Spam)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"class Spam:\n",
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" def __init__(self, x):\n",
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" self.__x = x\n",
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" \n",
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" #@Property\n",
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" def x(self):\n",
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" return self.__x\n",
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" \n",
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" #@x.setter\n",
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" def set_x(self, x):\n",
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" self.__x = x"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"ename": "TypeError",
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"evalue": "x() missing 1 required positional argument: 'self'",
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"output_type": "error",
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"traceback": [
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"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
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"\u001b[1;31mTypeError\u001b[0m Traceback (most recent call last)",
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"\u001b[1;32m<ipython-input-13-d139d5b9aa93>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mSpam\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mx\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
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"\u001b[1;31mTypeError\u001b[0m: x() missing 1 required positional argument: 'self'"
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]
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}
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],
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"source": [
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"Spam.x()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"spam = Spam(6)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 15,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"6"
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]
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},
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"execution_count": 15,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"Spam.x(spam)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"spam = Spam(3)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"3"
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]
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},
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"execution_count": 9,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"spam.x"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "code",
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"execution_count": 10,
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"metadata": {
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"collapsed": false
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},
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"outputs": [],
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"source": [
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"spam.x = 4"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"4"
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]
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},
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"execution_count": 11,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"spam.x"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 24,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"class ClassMethod:\n",
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" def __init__(self, fn):\n",
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" self.fn = fn\n",
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" \n",
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" def __get__(self, instance, cls):\n",
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" def wrap(*args, **kwargs):\n",
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" return self.fn(cls, *args, **kwargs)\n",
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" return wrap"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 32,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"class Grok:\n",
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" x = '123'\n",
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" \n",
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" #@ClassMethod\n",
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" def method(cls):\n",
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" print(cls.x)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 34,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"123\n"
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]
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}
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],
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"source": [
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"Grok.method(Grok)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 29,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": [
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"grok = Grok()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 30,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"123\n"
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]
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}
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],
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"source": [
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"grok.method()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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},
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{
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"cell_type": "code",
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"metadata": {
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"collapsed": true
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},
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},
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{
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"cell_type": "code",
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"metadata": {
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"collapsed": true
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},
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true
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},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.4.2"
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}
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"nbformat": 4,
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"nbformat_minor": 0
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}

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