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{
"metadata": {
"name": "",
"signature": "sha256:1bf3a3c32b50a821205df977feb0399264ec0b05a84acfd47497b8eab54ae29b"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7: Creating Classes and objects"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.1, Page No.118"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class dog:\n",
" def bark(self):\n",
" print \"WOOF!\"\n",
" \n",
" def setAge(self,age):\n",
" self.age=age\n",
" \n",
" def setWeight(self,weight):\n",
" self.weight=weight\n",
" \n",
" def setColor(self,color):\n",
" self.color=color\n",
" \n",
" def getAge(self):\n",
" return self.age\n",
" \n",
" def getWeight(self):\n",
" return self.weight\n",
" \n",
" def getColor(self):\n",
" return self.color\n",
" \n",
" \n",
"if __name__=='__main__':\n",
" fido=dog()\n",
" fido.setAge(3)\n",
" fido.setWeight(15)\n",
" fido.setColor(\"brown\")\n",
" \n",
" print \"Fido is a\",fido.getColor(),\" dog\"\n",
" print \"Fido is \",fido.getAge(),\" years old\"\n",
" print \"Fido Weighs \",fido.getWeight(),\" pounds\"\n",
" fido.bark()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fido is a brown dog\n",
"Fido is 3 years old\n",
"Fido Weighs 15 pounds\n",
"WOOF!\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.2, Page No.120"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class dog:\n",
" def bark(self):\n",
" print \"WOOF!\"\n",
" \n",
" def setValues(self,age,weight,color):\n",
" self.age=age\n",
" self.weight=weight\n",
" self.color=color\n",
" \n",
" def getAge(self):\n",
" return self.age\n",
" \n",
" def getWeight(self):\n",
" return self.weight\n",
" \n",
" def getColor(self):\n",
" return self.color\n",
" \n",
" \n",
"if __name__=='__main__':\n",
" fido=dog()\n",
" fido.setValues(3,15,\"brown\")\n",
" poonch=dog()\n",
" poonch.setValues(4,18,\"gray\")\n",
" print \"Fido is a\",fido.getColor(),\" dog\"\n",
" print \"Fido is \",fido.getAge(),\" years old\"\n",
" print \"Fido Weighs \",fido.getWeight(),\" pounds\"\n",
" fido.bark()\n",
" \n",
" print \"Poonch is \",poonch.getAge(),\" years old \",poonch.getColor(),\" dog who weighs \",poonch.getWeight(),\" pounds\",poonch.bark()\n",
" \n",
" "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fido is a brown dog\n",
"Fido is 3 years old\n",
"Fido Weighs 15 pounds\n",
"WOOF!\n",
"Poonch is 4 years old gray dog who weighs 18 pounds WOOF!\n",
"None\n"
]
}
],
"prompt_number": 36
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.3, Page No.122"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class dog:\n",
" def __init__(self,age,weight,color):\n",
" self.age=age\n",
" self.weight=weight\n",
" self.color=color\n",
" \n",
" def bark(self):\n",
" print \"WOOF!\"\n",
" \n",
" def getAge(self):\n",
" return self.age\n",
" \n",
" def getWeight(self):\n",
" return self.weight\n",
" \n",
" def getColor(self):\n",
" return self.color\n",
" \n",
" def __del__(self):\n",
" print \"Object destroyed\"\n",
" \n",
"if __name__=='__main__':\n",
" fido=dog(3,15,\"brown\")\n",
" poonch=dog(4,18,\"gray\")\n",
" \n",
" print \"Fido is a\",fido.getColor(),\" dog\"\n",
" print \"Fido is \",fido.getAge(),\" years old\"\n",
" print \"Fido Weighs \",fido.getWeight(),\" pounds\"\n",
" fido.bark()\n",
" \n",
" print \"Poonch is \",poonch.getAge(),\" years old \",poonch.getColor(),\" dog who weighs \",poonch.getWeight(),\" pounds\",poonch.bark()\n",
" \n",
" del fido\n",
" del poonch"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fido is a brown dog\n",
"Fido is 3 years old\n",
"Fido Weighs 15 pounds\n",
"WOOF!\n",
"Poonch is 4 years old gray dog who weighs 18 pounds WOOF!\n",
"None\n",
"Object destroyed\n",
"Object destroyed\n"
]
}
],
"prompt_number": 37
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Exmaple 7.4, Page No.124"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class dog:\n",
" def __init__(self,age=1,weight=2,color=\"black\"):\n",
" self.age=age\n",
" self.weight=weight\n",
" self.color=color \n",
" \n",
" def bark(self,noise):\n",
" print noise\n",
" \n",
" def getAge(self):\n",
" return self.age\n",
" \n",
" def getWeight(self):\n",
" return self.weight\n",
" \n",
" def getColor(self):\n",
" return self.color\n",
" \n",
" def __del__(self):\n",
" print \"Object destroyed\"\n",
" \n",
"if __name__=='__main__':\n",
" fido=dog(3,15,\"brown\")\n",
" poonch=dog(4,18,\"gray\")\n",
" rex=dog()\n",
" sammy=dog(2,6,\"white\")\n",
" \n",
" \n",
" print \"Fido is a\",fido.getColor(),\" dog\"\n",
" print \"Fido is \",fido.getAge(),\" years old\"\n",
" print \"Fido Weighs \",fido.getWeight(),\" pounds\"\n",
" fido.bark(\"WOOF!\")\n",
" \n",
" print \"Poonch is \",poonch.getAge(),\" years old \",poonch.getColor(),\" dog who weighs \",poonch.getWeight(),\" pounds\",poonch.bark(\"WOOF!\")\n",
" print \"Rex is \",rex.getAge(),\" years old \",rex.getColor(),\" dog who weighs \",rex.getWeight(),\" pounds\",rex.bark(\"GRRR!\")\n",
" print \"Sammy is \",sammy.getAge(),\" years old \",sammy.getColor(),\" dog who weighs \",sammy.getWeight(),\" pounds\",sammy.bark(\"BOWOW!\")\n",
" del fido\n",
" del poonch\n",
" del rex\n",
" del sammy"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Fido is a brown dog\n",
"Fido is 3 years old\n",
"Fido Weighs 15 pounds\n",
"WOOF!\n",
"Poonch is 4 years old gray dog who weighs 18 pounds WOOF!\n",
"None \n",
"Rex is 1 years old black dog who weighs 2 pounds GRRR!\n",
"None \n",
"Sammy is 2 years old white dog who weighs 6 pounds BOWOW!\n",
"None \n",
"Object destroyed\n",
"Object destroyed\n",
"Object destroyed\n",
"Object destroyed\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.5, Page No.126"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class Polygon:\n",
" weight=0\n",
" height=0\n",
" def setValues(self,w,h):\n",
" self.weight=w\n",
" self.height=h\n",
"\n",
"class Rectangle(Polygon):\n",
" def area(self):\n",
" return self.weight*self.height\n",
"\n",
"class Triangle(Polygon):\n",
" def area(self):\n",
" return (self.weight*self.height)/2\n",
"\n",
"rect=Rectangle()\n",
"trgl=Triangle()\n",
"rect.setValues(4,5)\n",
"trgl.setValues(4,5)\n",
"print \"Rectangle Area:\",rect.area()\n",
"print \"Triangle Area:\",trgl.area()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Rectangle Area: 20\n",
"Triangle Area: 10\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.6, Page No.128"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class Parent:\n",
" def __init__(self):\n",
" print \"Default Parent Constructor Called\"\n",
" def __init__(self,a):\n",
" print \"Overloaded Parent Constructor Called\"\n",
"\n",
"class Daughter(Parent):\n",
" def __init__(self):\n",
" print \"Derived Daughter class default constructor called\"\n",
"\n",
"class Son(Parent):\n",
" def __init__(self,a):\n",
" Parent.__init__(self,a)\n",
" print \"Derived Son class overloaded constructor called\"\n",
"\n",
"emma=Daughter()\n",
"andrew=Son(0)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Derived Daughter class default constructor called\n",
"Overloaded Parent Constructor Called\n",
"Derived Son class overloaded constructor called\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example No.7.7, Page No. 130"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"class Man:\n",
" def Speak(self, msg=\"Hello\"):\n",
" print \" \",msg\n",
"\n",
"class Hombre(Man):\n",
" def Speak(self,msg):\n",
" print msg\n",
"henry=Man()\n",
"enrique=Hombre()\n",
"henry.Speak()\n",
"henry.Speak(\"It's a beautiful evening.\")\n",
"enrique.Speak(\"Hola!\")\n",
"enrique.Speak(\"Es una trade hermosa\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" Hello\n",
" It's a beautiful evening.\n",
"Hola!\n",
"Es una trade hermosa\n"
]
}
],
"prompt_number": 22
}
],
"metadata": {}
}
]
}
|
