{
"metadata": {
"name": "",
"signature": "sha256:2551d4c0f797f2bbef63a528dde1d2dd1067208b3f54db92e7a20ac687ed39db"
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"nbformat": 3,
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"CHAPTER 10: STRUCTURES"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:342-343"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"name=[]\n",
"price=[]\n",
"pages=[]\n",
"for i in range(3):\n",
" name.append(\"\\0\")\n",
" price.append(0)\n",
" pages.append(0)\n",
"print \"Enter names,prices and no. of pages of 3 books\\n\"\n",
"for i in range(0,3,1):\n",
" name[i]=raw_input()\n",
" price[i]=eval(raw_input())\n",
" pages[i]=eval(raw_input())\n",
"print \"\\nAnd this is what you entered\\n\"\n",
"for i in range(0,3,1):\n",
" print \"%c %f %d\\n\" % (name[i],price[i],pages[i])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter names,prices and no. of pages of 3 books\n",
"\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"A\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"100.00\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"354\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"C\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"256.50\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"682\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"F\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"233.70\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"512\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"And this is what you entered\n",
"\n",
"A 100.000000 354\n",
"\n",
"C 256.500000 682\n",
"\n",
"F 233.700000 512\n",
"\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:343-344"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book: #YOU CAN ALSO USE CTYPES FOR IMPLEMENTING STRUCTURES\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"b1=book()\n",
"b2=book()\n",
"b3=book()\n",
"print \"Enter names,prices & no. of pages of 3 books\\n\"\n",
"b1.name=raw_input()\n",
"b1.price=eval(raw_input())\n",
"b1.pages=eval(raw_input())\n",
"b2.name=raw_input()\n",
"b2.price=eval(raw_input())\n",
"b2.pages=eval(raw_input())\n",
"b3.name=raw_input()\n",
"b3.price=eval(raw_input())\n",
"b3.pages=eval(raw_input())\n",
"print \"And this is what you entered\\n\"\n",
"print \"%c %f %d\\n\" % (b1.name,b1.price,b1.pages)\n",
"print \"%c %f %d\\n\" % (b2.name,b2.price,b2.pages)\n",
"print \"%c %f %d\\n\" % (b3.name,b3.price,b3.pages)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter names,prices & no. of pages of 3 books\n",
"\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"A\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"100.00\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"354\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"C\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"256.50\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"682\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"F\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"233.70\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"512\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"And this is what you entered\n",
"\n",
"A 100.000000 354\n",
"\n",
"C 256.500000 682\n",
"\n",
"F 233.700000 512\n",
"\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:347"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book():\n",
" def __init__(self,**kwds):\n",
" self.__dict__.update(kwds)\n",
"b1=book(name='B',price=130.00,pages=550)\n",
"print \"Address of name=%u\\n\" % (id(b1.name))\n",
"print \"Address of price=%u\\n\" % (id(b1.price))\n",
"print \"Address of pages=%u\\n\" % (id(b1.pages))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Address of name=20788864\n",
"\n",
"Address of price=88371144\n",
"\n",
"Address of pages=88859008\n",
"\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:348-349"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"def linkfloat():\n",
" a=0\n",
" b=id(a) #cause emulator to be linked\n",
"class book():\n",
" def __init__(self,**kwds):\n",
" self.__dict__.update(kwds)\n",
"b=[]\n",
"for i in range(3):\n",
" b.append(0) #setting initial value as zero\n",
"for i in range(0,3,1):\n",
" b[i]=book()\n",
"for i in range(0,3,1):\n",
" print \"Enter name price and pages\"\n",
" b[i].name=raw_input()\n",
" b[i].price=eval(raw_input())\n",
" b[i].pages=eval(raw_input())\n",
"for i in range(0,3,1):\n",
" print \"%c %f %d\\n\" % (b[i].name,b[i].price,b[i].pages)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter name price and pages\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"A\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"100.00\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"354\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter name price and pages\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"C\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"256.50\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"682\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter name price and pages\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"F\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"233.70\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"512\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"A 100.000000 354\n",
"\n",
"C 256.500000 682\n",
"\n",
"F 233.700000 512\n",
"\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:350-351"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class employee():\n",
" def __init__(self,**kwds):\n",
" self.__dict__.update(kwds)\n",
"e1=employee(name=\"Sanjay\",age=30,salary=5500.50)\n",
"e2=employee()\n",
"e3=employee()\n",
"#piece-meal copying\n",
"import copy\n",
"e2.name=copy.copy(e1.name)\n",
"e2.age=e1.age\n",
"e2.salary=e1.salary\n",
"#copying all elements at one go\n",
"e3=e2\n",
"print \"%s %d %f\\n\" % (e1.name,e1.age,e1.salary)\n",
"print \"%s %d %f\\n\" % (e2.name,e2.age,e2.salary)\n",
"print \"%s %d %f\\n\" % (e3.name,e3.age,e3.salary)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Sanjay 30 5500.500000\n",
"\n",
"Sanjay 30 5500.500000\n",
"\n",
"Sanjay 30 5500.500000\n",
"\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:351-352"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class address():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"class emp():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"a = address(phone=\"531046\", city=\"nagpur\", pin=10)\n",
"e = emp(name=\"jeru\", address=a)\n",
"print \"name=%s phone=%s\\n\" % (e.name,e.address.phone)\n",
"print \"city=%s pin=%d\\n\" % (e.address.city,e.address.pin)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"name=jeru phone=531046\n",
"\n",
"city=nagpur pin=10\n",
"\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:353"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"def display(s,t,n):\n",
" print \"%s %s %d\\n\" % (s,t,n)\n",
"b1=book(name=\"Let us C\",author=\"YPK\",callno=101)\n",
"display(b1.name,b1.author,b1.callno)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Let us C YPK 101\n",
"\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:353-354"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"def display(b):\n",
" print \"%s %s %d\\n\" % (b.name,b.author,b.callno)\n",
"b1=book(name=\"Let us C\",author=\"YPK\",callno=101)\n",
"display(b1)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Let us C YPK 101\n",
"\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:354-355"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"b1=book(name=\"Let us C\",author=\"YPK\",callno=101)\n",
"ptr=book()\n",
"ptr=b1\n",
"print \"%s %s %d\\n\" % (b1.name,b1.author,b1.callno)\n",
"print \"%s %s %d\\n\" % (ptr.name,ptr.author,ptr.callno)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Let us C YPK 101\n",
"\n",
"Let us C YPK 101\n",
"\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:355-356"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class book():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"def display(b):\n",
" print \"%s %s %d\\n\" % (b.name,b.author,b.callno)\n",
"b1=book(name=\"Let us C\",author=\"YPK\",callno=101)\n",
"display(b1)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Let us C YPK 101\n",
"\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:356"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class emp():\n",
" def __init__(self, **kwds):\n",
" self.__dict__.update(kwds)\n",
"e=emp(a=0,ch='\\0',s=0.0)\n",
"print \"%u %u %u\\n\" % (id(e.a),id(e.ch),id(e.s))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"20623060 20204312 88374024\n",
"\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE ON PAGE:357-358"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" \n",
"class emp():\n",
" def __init__(self,a,ch,s): #Structure without using dictionary\n",
" self.a=a\n",
" self.ch=ch\n",
" self.s=s\n",
"e=emp(a=0,ch='\\0',s=0.0)\n",
"print \"%u %u %u\\n\" % (id(e.a),id(e.ch),id(e.s))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"20360916 19942168 88177544\n",
"\n"
]
}
],
"prompt_number": 10
}
],
"metadata": {}
}
]
}