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{
"metadata": {
"name": "ch14"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": "Chapter 14 : Classes and invariants"
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.1 page no :149\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.1 page no :149\n'''\n\nclass Card:\n def __init__(self,s=None,r=None):\n if s==None:\n self.suit = 0\n self.rank = 0\n else:\n self.suit = s; \n self.rank = r;\n\n def getRank (self):\n return self.rank\n \n def getSuit (self):\n return self.suit\n \n def setRank(self,r):\n self.rank = r \n\n def setSuit (self, s):\n self.suit = s",
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.2 page no :151\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.2 page no :151\ndefining class \n'''\n\nclass Complex:\n def __init__(self,r=None,i=None):\n if r==None:\n pass\n else:\n self.real = r\n self.imag = i",
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.3 page no : 152\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.3 page no : 152\n'''\nimport math\nclass Complex:\n def __init__(self,r=None,i=None):\n if r==None:\n self.real = 0\n self.imag = 0\n self.polar = False\n self.cartesian = False\n else:\n self.real = r\n self.imag = i\n self.cartesian = True\n self.polar = True\n self.mag = 0\n self.theta = 0\n\n def getReal (self):\n if (self.cartesian == False):\n self.calculateCartesian ();\n return self.real;\n \n def getImag(self):\n return self.imag\n\n def calculateCartesian (self):\n self.real = self.mag * math.cos(self.theta);\n self.imag = self.mag * math.sin (self.theta); \n self.cartesian = True;\n\n def printCartesian (self):\n print self.getReal() , \" + \" , self.getImag() , \"i\"\n\n def printPolar(self):\n print self.mag , \" e^ \" , self.theta , \"i\"\n\n\nc1 = Complex(2.0, 3.0);\nc1.printCartesian();\nc1.printPolar();",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "2.0 + 3.0 i\n0 e^ 0 i\n"
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.4 page no : 155\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.4 page no : 155\n'''\nclass Complex:\n def __init__(self,r=None,i=None):\n if r==None:\n self.real = 0\n self.imag = 0\n self.polar = False\n self.cartesian = False\n else:\n self.real = r\n self.imag = i\n self.cartesian = True\n self.polar = True\n self.mag = 0\n self.theta = 0\n \n def getReal (self):\n if (self.cartesian == False):\n self.calculateCartesian ();\n return self.real;\n \n def getImag(self):\n return self.imag\n\n\n def add(self,b):\n real = self.getReal() + b.getReal();\n imag = self.getImag() + b.getImag();\n s = Complex(real, imag);\n return s\n\n def printCartesian (self):\n print self.getReal() , \" + \" , self.getImag() , \"i\"\n\nc1 = Complex(2.0, 3.0);\nc2 = Complex(3.0, 4.0);\ns = c1.add (c2);\ns.printCartesian();",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "5.0 + 7.0 i\n"
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.5 page no :156\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.5 page no :156\n'''\nimport math\nclass Complex:\n def __init__(self,r=None,i=None):\n if r==None:\n self.real = 0\n self.imag = 0\n self.polar = False\n self.cartesian = False\n else:\n self.real = r\n self.imag = i\n self.cartesian = True\n self.polar = True\n self.mag = 0\n self.theta = 0\n \n def getReal (self):\n if (self.cartesian == False):\n self.calculateCartesian ();\n return self.real;\n \n def getImag(self):\n return self.imag\n\n def calculateCartesian (self):\n self.real = self.mag * math.cos(self.theta);\n self.imag = self.mag * math.sin (self.theta); \n self.cartesian = True;\n\n\n def printCartesian (self):\n print self.getReal() , \" + \" , self.getImag() , \"i\"\n\n def mult(self,b):\n mag = self.mag * b.mag\n theta = self.theta + b.theta\n product = Complex()\n product.setPolar (mag, theta);\n return product;\n\n def setPolar(self,m,t):\n self.mag = m\n self.theta = t;\n self.cartesian = False\n self.polar = True;\n\n",
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": "example 14.6 page no :159\n"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''\nexample 14.6 page no :159\ndefining class Complex\n'''\n\nclass Complex:\n def __init__(self,r=None,i=None):\n if r==None:\n self.real = 0\n self.imag = 0\n self.polar = False\n self.cartesian = False\n else:\n self.real = r\n self.imag = i\n self.cartesian = True\n self.polar = True\n self.mag = 0\n self.theta = 0\n \n def getReal (self):\n if (self.cartesian == False):\n self.calculateCartesian ();\n return self.real;\n \n def getImag(self):\n return self.imag\n\n def printCartesian (self):\n print self.getReal() , \" + \" , self.getImag() , \"i\"\n\n def mult(self,b):\n mag = self.mag * b.mag\n theta = a.theta + b.theta\n product = Complex()\n product.setPolar (mag, theta);\n return product;\n\n def setPolar(self,m,t):\n self.mag = m\n self.theta = t;\n self.cartesian = False\n self.polar = true;\n",
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 9
},
{
"cell_type": "code",
"collapsed": false,
"input": "",
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
