{
"metadata": {
"name": "",
"signature": "sha256:987b4dacc78713a17909fe49b56cfa38644dbc08cbbaecbb827fc7655cf390d8"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter7, Structures and File Input/Output"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C28ST1, Page number:592"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from collections import namedtuple\n",
"\n",
"#Structure declaration and definition\n",
"struct_cd_collection = namedtuple(\"struct_cd_collection\", \"title artist num_songs price date_purch\")\n",
"\n",
"#Structure for Cd Collection\n",
"cd1 = struct_cd_collection(\"Red Moon Men\", \"Sam and the Sneeds\", 12,11.95,\"02/13/92\")\n",
"\n",
"#Result\n",
"print \"Here is the CD information :\\n\\n\"\n",
"print \"Title:\",cd1.title,\"\\n\"\n",
"print \"Artist:\",cd1.artist,\"\\n\"\n",
"print \"Songs:\",cd1.num_songs,\"\\n\"\n",
"print \"Price:\",cd1.price,\"\\n\"\n",
"print \"Date purchased:\",cd1.date_purch,\"\\n\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Here is the CD information :\n",
"\n",
"\n",
"Title: Red Moon Men \n",
"\n",
"Artist: Sam and the Sneeds \n",
"\n",
"Songs: 12 \n",
"\n",
"Price: 11.95 \n",
"\n",
"Date purchased: 02/13/92 \n",
"\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C28ST2, Page number:593"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from collections import namedtuple\n",
"\n",
"#Structure initial declaration\n",
"students = namedtuple(\"students\", \"name age average\")\n",
"\n",
"\n",
"#Get data\n",
"print \"What is first student's name? \",\n",
"x=raw_input()\n",
"print \"What is the first student's age? \",\n",
"y=input()\n",
"print \"What is the first student's average ? \",\n",
"z=input()\n",
"\n",
"#Assign data to the structure variable\n",
"student1=students(x,y,z)\n",
"\n",
"print \"\\n\"\n",
"\n",
"#Get data\n",
"print \"What is second student's name? \",\n",
"x=raw_input()\n",
"print \"What is the second student's age? \",\n",
"y=input()\n",
"print \"What is the second student's average ? \",\n",
"z=input()\n",
"\n",
"#Assign data to the structure variable\n",
"student2=students(x,y,z)\n",
"\n",
"#Result\n",
"print \"\\n\\nHere is the student information you entered:\\n\\n\"\n",
"print \"Student #1:\\n\"\n",
"print \"Name: \",student1.name,\"\\n\"\n",
"print \"Age: \",student1.age,\"\\n\"\n",
"print \"Average: \",'%.2f'%student1.average,\"\\n\"\n",
"\n",
"print \"Student #2:\\n\"\n",
"print \"Name: \",student2.name,\"\\n\"\n",
"print \"Age: \",student2.age,\"\\n\"\n",
"print \"Average: \",'%.2f'%student2.average,\"\\n\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"What is first student's name? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Larry\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the first student's age? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"14\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the first student's average ? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"87.67\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" \n",
"\n",
"What is second student's name? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Judy\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the second student's age? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"15\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the second student's average ? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"95.38\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" \n",
"\n",
"Here is the student information you entered:\n",
"\n",
"\n",
"Student #1:\n",
"\n",
"Name: Larry \n",
"\n",
"Age: 14 \n",
"\n",
"Average: 87.67 \n",
"\n",
"Student #2:\n",
"\n",
"Name: Judy \n",
"\n",
"Age: 15 \n",
"\n",
"Average: 95.38 \n",
"\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C28ST3, Page number:596"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Function definitions\n",
"\n",
"def fill_structs(student_var):\n",
" #Get student data\n",
" print \"What is student's name? \",\n",
" x=raw_input()\n",
" print \"What is the student's age? \",\n",
" y=input()\n",
" print \"What is the student's average ? \",\n",
" z=input()\n",
" student_var=students(x,y,z)\n",
" return student_var\n",
"\n",
"\n",
"def pr_students(student_var):\n",
" print \"Name: \",student_var.name,\"\\n\",\n",
" print \"Age: \",student_var.age,\"\\n\",\n",
" print \"Average: \",student_var.average,\"\\n\",\n",
"\n",
"#Structure declaration\n",
"from collections import namedtuple\n",
"students=namedtuple(\"students\",\"name age average\")\n",
"\n",
"#Structure variable declaration\n",
"student1=students(\" \",0,0.0)\n",
"student2=students(\" \",0,0.0)\n",
"\n",
"#Stucture variable is passed as copy to the function\n",
"student1=fill_structs(student1)\n",
"student2=fill_structs(student2)\n",
"\n",
"#Result\n",
"print \"\\n\\nHere is the student information you entered:\\n\\n\"\n",
"pr_students(student1)\n",
"pr_students(student2)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"What is student's name? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Larry\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the student's age? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"14\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the student's average ? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"87.67\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is student's name? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Judy\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the student's age? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"15\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" What is the student's average ? "
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"97.38\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" \n",
"\n",
"Here is the student information you entered:\n",
"\n",
"\n",
"Name: Larry \n",
"Age: 14 \n",
"Average: 87.67 \n",
"Name: Judy \n",
"Age: 15 \n",
"Average: 97.38 \n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C28CUST, Page number:598"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Structure definition\n",
"\n",
"from collections import namedtuple\n",
"customer_rec=namedtuple(\"customer_rec\",\"cust_name balance dist_rate\")\n",
"\n",
"customer=customer_rec(\"Steve Thompson\",431.23,.25)\n",
"print \"Before the update\",customer.cust_name,\" has a balance of $\",'%.2f' %customer.balance,\"\\n\",\n",
"\n",
"#Update the balance\n",
"customer_rec.balance=customer.balance*(1.0-customer.dist_rate)\n",
"\n",
"#Result\n",
"print \"After the update\",customer.cust_name,\" has a balance of $\",'%.2f' %customer.balance,\"\\n\","
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Before the update Steve Thompson has a balance of $ 431.23 \n",
"After the update Steve Thompson has a balance of $ 323.42 \n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C28STCPY, Page number:599"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Structure declaration\n",
"from collections import namedtuple\n",
"students=namedtuple(\"students\",\"st_name grade age average\")\n",
"\n",
"#Structure variable declaration\n",
"std1=students(\"Joe Brown\",'A',13,91.4)\n",
"std2=students(\" \",\" \",0,0.0)\n",
"std3=students(\" \",\" \",0,0.0)\n",
"\n",
"#Assigning one structure variable to another.\n",
"std2=std1\n",
"std3=std1\n",
"\n",
"\n",
"#Result\n",
"print \"The contents of std2:\\n\",\n",
"print std2.st_name,\", \",std2.grade,\", \",std2.age,\", \",'%.1f' %std2.average,\"\\n\\n\"\n",
"\n",
"print \"The contents of std3:\\n\",\n",
"print std3.st_name,\", \",std3.grade,\", \",std3.age,\", \",'%.1f' %std3.average,\"\\n\\n\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The contents of std2:\n",
"Joe Brown , A , 13 , 91.4 \n",
"\n",
"\n",
"The contents of std3:\n",
"Joe Brown , A , 13 , 91.4 \n",
"\n",
"\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C30WR1, Page number:635"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#open a new file in write mode\n",
"fp = open ( \"C:\\Users\\THEBEST\\Desktop\\NAMES.txt\", \"w\" ) \n",
"\n",
"fp.writelines(\"Michel Langston\\n\")\n",
"fp.writelines(\"Sally Redding\\n\")\n",
"fp.writelines(\"Jane Kirk\\n\")\n",
"fp.writelines(\"Stacy Wikert\\n\")\n",
"fp.writelines(\"Joe Hiquet\\n\")\n",
"\n",
"#Close file\n",
"fp.close()"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C30WR2, Page number:636"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Creates a file in write mode\n",
"fp = open ( \"C:\\Users\\THEBEST\\Desktop\\NUMS.1.txt\", \"w\" ) \n",
"\n",
"if not fp:\n",
" print \"Error opening file.\\n\"\n",
"else:\n",
" for ctr in range(1,101,1):\n",
" fp.write('%d' %ctr) #Writes number from 1-100 into the file\n",
"fp.close()"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C30AP1, Page number:638"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#opens existing file\n",
"fp = open ( \"C:\\Users\\THEBEST\\Desktop\\NAMES.TXT\", \"a\" ) \n",
"\n",
"#Adds to file\n",
"fp.writelines(\"Johnny Smith\\n\")\n",
"fp.writelines(\"Laura Hull \\n\")\n",
"fp.writelines(\"Mark Brown\\n\")\n",
"\n",
"#Close file\n",
"fp.close()"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C30RE1, Page number:640"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#print \"What is the name of the file you want to see? \"\n",
"#filename=raw_input()\n",
"filename = \"NAMES.txt\"\n",
"filename=\"C:/Users/THEBEST/Desktop/\"+ filename\n",
"\n",
"#Open file in read mode\n",
"fp = open (filename,\"rb\")\n",
"if not fp:\n",
" print \"\\n\\n*** That file does not exist ***\\n\"\n",
" exit(0)\n",
"else:\n",
" print in_char\n",
"\n",
"#Close file\n",
"fp.close()"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C30RE2, Page number:641"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#File1 to take backup\n",
"print \"What is the name of the file you want to back up? \"\n",
"in_filename=raw_input()\n",
"\n",
"#File2 to copy contents\n",
"print \"What is the name of the file you want to copy \",in_filename,\"to? \"\n",
"out_filename=raw_input()\n",
"\n",
"in_fp=open(in_filename,\"r\")\n",
"if not in_fp:\n",
" print \"\\n\\n*** \",in_filename,\"does not exist***\\n\"\n",
" exit(0)\n",
"else:\n",
" out_fp=open(out_filename,\"w\")\n",
" if not out_fp:\n",
" print \"\\n\\n*** Error opening \",out_filename,\"***\\n\"\n",
" exit(0)\n",
" else:\n",
" print \"\\nCopying...\\n\" #Reads from old file \n",
" for in_char in in_fp.readlines(): #and copies it to new file\n",
" out_fp.writelines(in_char)\n",
" print \"\\nThe file is copied.\\n\"\n",
"\n",
"#Close all files\n",
"in_fp.close()\n",
"out_fp.close()"
],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32CON, Page number:664"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"class Sphere: #Class declaration\n",
" def __init__(self, xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
" \n",
" def volume(self):\n",
" return r*r*r*4*PI/3\n",
"\n",
" def surface_area(self):\n",
" return r*r*4*PI\n",
"\n",
"def main():\n",
" s = Sphere(1.0,2.0,3.0,4.0) #Class object\n",
" \n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r #Result\n",
"\n",
"main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n"
]
}
],
"prompt_number": 15
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32DES, Page number:665"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" \n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
" #Class object\n",
" s = Sphere(1.0,2.0,3.0,4.0) \n",
" \n",
" #Result\n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
"\n",
"\n",
"main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n",
"Sphere( 1.0 , 2.0 , 3.0 , 4.0 ) destroyed\n"
]
}
],
"prompt_number": 16
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32MEM, Page number:667"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" \n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
" #Class object\n",
" s = Sphere(1.0,2.0,3.0,4.0) \n",
" #Result\n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
" print \"The volume is \",s.volume(),\"\\n\",\n",
" print \"The surface area is \",s.surface_area(),\"\\n\",\n",
"\n",
"main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n",
"The volume is 268.082346667 \n",
"The surface area is 201.06176 \n",
"Sphere( 1.0 , 2.0 , 3.0 , 4.0 ) destroyed\n"
]
}
],
"prompt_number": 17
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32MEM1, Page number:668"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
"\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
" #Class object\n",
" s = Sphere(1.0,2.0,3.0,4.0) \n",
" #Result\n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
" print \"The volume is \",s.volume(),\"\\n\", \n",
" print \"The surface area is \",s.surface_area(),\"\\n\",\n",
"\n",
"main()\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n",
"The volume is 268.082346667 \n",
"The surface area is 201.06176 \n",
"Sphere( 1.0 , 2.0 , 3.0 , 4.0 ) destroyed\n"
]
}
],
"prompt_number": 18
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32MEM1A, Page number:669"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
"\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
" #Class object\n",
" s = Sphere(1.0,2.0,3.0,4.0) \n",
" #Result\n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
" print \"The volume is \",(s.r*s.r*s.r*4*PI/3),\"\\n\", #volume() function is expanded here\n",
" print \"The surface area is \",s.surface_area(),\"\\n\",\n",
"\n",
"main()\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n",
"The volume is 268.082346667 \n",
"The surface area is 201.06176 \n",
"Sphere( 1.0 , 2.0 , 3.0 , 4.0 ) destroyed\n"
]
}
],
"prompt_number": 19
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32DEF, Page number:671"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord=2.0,zcoord=2.5,radius=1.0):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
"\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
"\n",
" #Class objects\n",
" s = Sphere(1.0) \n",
" t = Sphere(1.0,1.1)\n",
" u = Sphere(1.0,1.1,1.2)\n",
" v = Sphere(1.0,1.1,1.2,1.3)\n",
"\n",
" #Result\n",
" print \"s: X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
" print \"The volume is \",s.volume(),\"\\n\", \n",
" print \"The surface area is \",s.surface_area(),\"\\n\",\n",
"\n",
" print \"t: X=\",t.x,\", Y=\",t.y,\", Z=\",t.z,\", R=\",t.r \n",
" print \"The volume is \",t.volume(),\"\\n\", \n",
" print \"The surface area is \",t.surface_area(),\"\\n\",\n",
"\n",
" print \"u: X=\",u.x,\", Y=\",u.y,\", Z=\",u.z,\", R=\",u.r \n",
" print \"The volume is \",u.volume(),\"\\n\", \n",
" print \"The surface area is \",u.surface_area(),\"\\n\",\n",
"\n",
" print \"v: X=\",v.x,\", Y=\",v.y,\", Z=\",v.z,\", R=\",v.r \n",
" print \"The volume is \",v.volume(),\"\\n\", \n",
" print \"The surface area is \",v.surface_area(),\"\\n\",\n",
"\n",
"\n",
"main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"s: X= 1.0 , Y= 2.0 , Z= 2.5 , R= 1.0\n",
"The volume is 4.18878666667 \n",
"The surface area is 12.56636 \n",
"t: X= 1.0 , Y= 1.1 , Z= 2.5 , R= 1.0\n",
"The volume is 4.18878666667 \n",
"The surface area is 12.56636 \n",
"u: X= 1.0 , Y= 1.1 , Z= 1.2 , R= 1.0\n",
"The volume is 4.18878666667 \n",
"The surface area is 12.56636 \n",
"v: X= 1.0 , Y= 1.1 , Z= 1.2 , R= 1.3\n",
"The volume is 9.20276430667 \n",
"The surface area is 21.2371484 \n",
"Sphere( 1.0 , 2.0 , 2.5 , 1.0 ) destroyed\n",
"Sphere( 1.0 , 1.1 , 2.5 , 1.0 ) destroyed\n",
"Sphere( 1.0 , 1.1 , 1.2 , 1.0 ) destroyed\n",
"Sphere( 1.0 , 1.1 , 1.2 , 1.3 ) destroyed\n"
]
}
],
"prompt_number": 20
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"C32OVCON, Page number:673"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"from math import *\n",
"PI = 3.14159\n",
"\n",
"#Class declaration\n",
"class Sphere: \n",
" def __init__( self,xcoord,ycoord,zcoord,radius):\n",
" self.r = radius\n",
" self.x = xcoord\n",
" self.y = ycoord\n",
" self.z = zcoord\n",
"\n",
" def __del__(self):\n",
" print \"Sphere(\",self.x,\",\" ,self.y,\",\",self.z,\",\",self.r,\") destroyed\"\n",
"\n",
" def volume(self):\n",
" return self.r*self.r*self.r*4*PI/3\n",
"\n",
"\n",
"\n",
" def surface_area(self):\n",
" return self.r*self.r*4*PI\n",
"\n",
"def main():\n",
" #Class object\n",
" s = Sphere(1.0,2.0,3.0,4.0) \n",
" #Result\n",
" print \"X=\",s.x,\", Y=\",s.y,\", Z=\",s.z,\", R=\",s.r \n",
" print \"The volume is \",(s.r*s.r*s.r*4*PI/3),\"\\n\", #volume() function is expanded here\n",
" print \"The surface area is \",s.surface_area(),\"\\n\",\n",
"\n",
"main()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"X= 1.0 , Y= 2.0 , Z= 3.0 , R= 4.0\n",
"The volume is 268.082346667 \n",
"The surface area is 201.06176 \n",
"Sphere( 1.0 , 2.0 , 3.0 , 4.0 ) destroyed\n"
]
}
],
"prompt_number": 21
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}