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Diffstat (limited to 'C++_from_the_Ground/Chapter_18(1).ipynb')
| -rw-r--r-- | C++_from_the_Ground/Chapter_18(1).ipynb | 600 |
1 files changed, 539 insertions, 61 deletions
diff --git a/C++_from_the_Ground/Chapter_18(1).ipynb b/C++_from_the_Ground/Chapter_18(1).ipynb index 3ad3c39c..e2cae07f 100644 --- a/C++_from_the_Ground/Chapter_18(1).ipynb +++ b/C++_from_the_Ground/Chapter_18(1).ipynb @@ -1,6 +1,7 @@ { "metadata": { - "name": "Chapter 18" + "name": "", + "signature": "sha256:3dbb4b61b32533eb72607c7c790e9f8f91b9c2e123ddbd5190ffe13a1b2b7647" }, "nbformat": 3, "nbformat_minor": 0, @@ -10,24 +11,51 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h1>Chapter 18: The C++ I/O System<h1>" + "source": [ + "<h1>Chapter 18: The C++ I/O System<h1>" + ] }, { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.1, Page Number: 421<h3>" + "source": [ + "<h3>Example 18.1, Page Number: 421<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementation of overloading << for print in python'''\n\nclass three_d:\n def __init__(self,a,b,c): #3D coordinates\n self.x=a\n self.y=b\n self.z=c\n #Display x,y,z coordinates - three_d inserter.\n def __repr__(self):\n return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)+\"\\n\"\n\n#Variable declaration\na=three_d(1,2,3)\nb=three_d(3,4,5)\nc=three_d(5,6,7)\n\n#Result\nprint a,b,c", + "input": [ + "\n", + "class three_d:\n", + " def __init__(self,a,b,c): #3D coordinates\n", + " self.x=a\n", + " self.y=b\n", + " self.z=c\n", + " #Display x,y,z coordinates - three_d inserter.\n", + " def __repr__(self):\n", + " return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)+\"\\n\"\n", + "\n", + "#Variable declaration\n", + "a=three_d(1,2,3)\n", + "b=three_d(3,4,5)\n", + "c=three_d(5,6,7)\n", + "\n", + "#Result\n", + "print a,b,c" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "1, 2, 3\n 3, 4, 5\n 5, 6, 7\n\n" + "text": [ + "1, 2, 3\n", + " 3, 4, 5\n", + " 5, 6, 7\n", + "\n" + ] } ], "prompt_number": 1 @@ -35,19 +63,46 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.2, Page Number: 423<h3>" + "source": [ + "<h3>Example 18.2, Page Number: 423<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Using a friend function implement overloading of << in python'''\n\nclass thrnee_d:\n def __init__(self,a,b,c): #3D coordinates\n self.x=a\n self.y=b\n self.z=c\n #Display x,y,z coordinates - three_d inserter.\n __repr__=repr \n \n#Friend function \ndef repr():\n return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)+\"\\n\"\n\n#Variable declaration\na=three_d(1,2,3)\nb=three_d(3,4,5)\nc=three_d(5,6,7)\n\nprint a,b,c", + "input": [ + "\n", + "class thrnee_d:\n", + " def __init__(self,a,b,c): #3D coordinates\n", + " self.x=a\n", + " self.y=b\n", + " self.z=c\n", + " #Display x,y,z coordinates - three_d inserter.\n", + " __repr__=repr \n", + " \n", + "#Friend function \n", + "def repr():\n", + " return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)+\"\\n\"\n", + "\n", + "#Variable declaration\n", + "a=three_d(1,2,3)\n", + "b=three_d(3,4,5)\n", + "c=three_d(5,6,7)\n", + "\n", + "print a,b,c" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "1, 2, 3\n 3, 4, 5\n 5, 6, 7\n\n" + "text": [ + "1, 2, 3\n", + " 3, 4, 5\n", + " 5, 6, 7\n", + "\n" + ] } ], "prompt_number": 2 @@ -55,19 +110,45 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.3, Page Number: 424<h3>" + "source": [ + "<h3>Example 18.3, Page Number: 424<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementation of overloading << and >> in python'''\n\nclass three_d:\n def __init__(self,a,b,c): #3D coordinates\n self.x=a\n self.y=b\n self.z=c\n #Display x,y,z coordinates - three_d inserter.\n def __repr__(self):\n return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)\n\n#Variable declaration\na=three_d(1,2,3)\n\nprint a\n\n#User input\nprint \"Enter X,Y,Z values:\"\na=three_d(4,5,6) \nprint a", + "input": [ + "\n", + "class three_d:\n", + " def __init__(self,a,b,c): #3D coordinates\n", + " self.x=a\n", + " self.y=b\n", + " self.z=c\n", + " #Display x,y,z coordinates - three_d inserter.\n", + " def __repr__(self):\n", + " return str(self.x)+\", \"+str(self.y)+\", \"+str(self.z)\n", + "\n", + "#Variable declaration\n", + "a=three_d(1,2,3)\n", + "\n", + "print a\n", + "\n", + "#User input\n", + "print \"Enter X,Y,Z values:\"\n", + "a=three_d(4,5,6) \n", + "print a" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "1, 2, 3\nEnter X,Y,Z values:\n4, 5, 6\n" + "text": [ + "1, 2, 3\n", + "Enter X,Y,Z values:\n", + "4, 5, 6\n" + ] } ], "prompt_number": 3 @@ -75,19 +156,34 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.4, Page Number: 428<h3>" + "source": [ + "<h3>Example 18.4, Page Number: 428<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementing some ios flags in python'''\n\n\nprint '{0:+d}'.format(123), #for ios::showpos\nif(123.23>0):\n i='{0:e}'.format(123.23) #for ios::scientific \n i='+'+i\n print i\nelse :\n print '{0:e}'.format(123.23)\n ", + "input": [ + "\n", + "\n", + "print '{0:+d}'.format(123), #for ios::showpos\n", + "if(123.23>0):\n", + " i='{0:e}'.format(123.23) #for ios::scientific \n", + " i='+'+i\n", + " print i\n", + "else :\n", + " print '{0:e}'.format(123.23)\n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "+123 +1.232300e+02\n" + "text": [ + "+123 +1.232300e+02\n" + ] } ], "prompt_number": 4 @@ -95,19 +191,55 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.5, Page Number: 430<h3>" + "source": [ + "<h3>Example 18.5, Page Number: 430<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementing some ios flags in python'''\n\nimport string\n\nprint '{0:+d}'.format(123), #for ios::showpos\nif(123.23>0):\n i='{0:e}'.format(123.23) #for ios::scientific \n i='+'+i\n print i\nelse :\n print '{0:e}'.format(123.23)\n\n \nprint '{:10.2f}'.format(123.23), #2 digits left of decimal\nif(123.23>0):\n i='{0:.2e}'.format(123.23) #for ios::scientific \n i='+'+i\n print i\nelse :\n print '{0:.2e}'.format(123.23)\n \n \nprint '{:#>10}'.format(str(123)), #for ios::fill\nif(123.23>0): \n i='{0:.2e}'.format(123.23) #for ios::scientific \n i='+'+i\n print i\nelse :\n print '{0:.2e}'.format(123.23)\n\n", + "input": [ + "\n", + "import string\n", + "\n", + "print '{0:+d}'.format(123), #for ios::showpos\n", + "if(123.23>0):\n", + " i='{0:e}'.format(123.23) #for ios::scientific \n", + " i='+'+i\n", + " print i\n", + "else :\n", + " print '{0:e}'.format(123.23)\n", + "\n", + " \n", + "print '{:10.2f}'.format(123.23), #2 digits left of decimal\n", + "if(123.23>0):\n", + " i='{0:.2e}'.format(123.23) #for ios::scientific \n", + " i='+'+i\n", + " print i\n", + "else :\n", + " print '{0:.2e}'.format(123.23)\n", + " \n", + " \n", + "print '{:#>10}'.format(str(123)), #for ios::fill\n", + "if(123.23>0): \n", + " i='{0:.2e}'.format(123.23) #for ios::scientific \n", + " i='+'+i\n", + " print i\n", + "else :\n", + " print '{0:.2e}'.format(123.23)\n", + "\n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "+123 +1.232300e+02\n 123.23 +1.23e+02\n#######123 +1.23e+02\n" + "text": [ + "+123 +1.232300e+02\n", + " 123.23 +1.23e+02\n", + "#######123 +1.23e+02\n" + ] } ], "prompt_number": 1 @@ -115,19 +247,28 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.6, Page Number: 432<h3>" + "source": [ + "<h3>Example 18.6, Page Number: 432<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implement io manipulators in python'''\n\nprint '{0:.0e}'.format(1000.243) #for setprecision\nprint '{:>20}'.format(\"Hello There\") #to set width and right align\n", + "input": [ + "\n", + "print '{0:.0e}'.format(1000.243) #for setprecision\n", + "print '{:>20}'.format(\"Hello There\") #to set width and right align\n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "1e+03\n Hello There\n" + "text": [ + "1e+03\n", + " Hello There\n" + ] } ], "prompt_number": 5 @@ -135,19 +276,33 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.7, Page Number: 433<h3>" + "source": [ + "<h3>Example 18.7, Page Number: 433<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementing some ios flags in python'''\n\nprint '{0:+d}'.format(123), #for ios::showpos\nif(123.23>0):\n i='{0:e}'.format(123.23) #for ios::scientific \n i='+'+i\n print i\nelse :\n print '{0:e}'.format(123.23)\n ", + "input": [ + "\n", + "print '{0:+d}'.format(123), #for ios::showpos\n", + "if(123.23>0):\n", + " i='{0:e}'.format(123.23) #for ios::scientific \n", + " i='+'+i\n", + " print i\n", + "else :\n", + " print '{0:e}'.format(123.23)\n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "+123 +1.232300e+02\n" + "text": [ + "+123 +1.232300e+02\n" + ] } ], "prompt_number": 6 @@ -155,19 +310,30 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.8, Page Number: 433<h3>" + "source": [ + "<h3>Example 18.8, Page Number: 433<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Removing leading whitespaces from a string'''\n\n#User input\ns=\" Hello\"\n\n#Result\nprint s.lstrip() #lstrip removes leading spaces", + "input": [ + "\n", + "#User input\n", + "s=\" Hello\"\n", + "\n", + "#Result\n", + "print s.lstrip() #lstrip removes leading spaces" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Hello\n" + "text": [ + "Hello\n" + ] } ], "prompt_number": 7 @@ -175,19 +341,33 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.9, Page Number: 434<h3>" + "source": [ + "<h3>Example 18.9, Page Number: 434<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implementing some ios flags in python'''\n\ndef setup(s):\n return '{:$<10}'.format(str(s))\n\n\n#Result\nprint 10,setup(10)\n\n\n", + "input": [ + "\n", + "def setup(s):\n", + " return '{:$<10}'.format(str(s))\n", + "\n", + "\n", + "#Result\n", + "print 10,setup(10)\n", + "\n", + "\n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "10 10$$$$$$$$\n" + "text": [ + "10 10$$$$$$$$\n" + ] } ], "prompt_number": 2 @@ -195,12 +375,26 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.10, Page Number: 435<h3>" + "source": [ + "<h3>Example 18.10, Page Number: 435<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Prompting the user to enter number in hexadecimal form'''\n\ndef prompt():\n print \"Enter number using hex format:\"\n hex=0x46\n return hex\n\n\n#Result\ni=prompt()\nprint i\n\n", + "input": [ + "\n", + "def prompt():\n", + " print \"Enter number using hex format:\"\n", + " hex=0x46\n", + " return hex\n", + "\n", + "\n", + "#Result\n", + "i=prompt()\n", + "print i\n", + "\n" + ], "language": "python", "metadata": {}, "outputs": [] @@ -208,12 +402,28 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.11, Page Number: 438<h3>" + "source": [ + "<h3>Example 18.11, Page Number: 438<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to write to a file'''\n\n#Open a file, creating one if it does not already exist\nout=open(\"test\",'w')\n\n#In case file cannot open\nif(not(out)):\n print \"Cannot open file.\"\nelse:\n #Write to file\n out.write(\"10 123.23\\n\")\n out.write(\"This is a short text file.\")\n #Close the file\n out.close()", + "input": [ + "\n", + "#Open a file, creating one if it does not already exist\n", + "out=open(\"test\",'w')\n", + "\n", + "#In case file cannot open\n", + "if(not(out)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " #Write to file\n", + " out.write(\"10 123.23\\n\")\n", + " out.write(\"This is a short text file.\")\n", + " #Close the file\n", + " out.close()" + ], "language": "python", "metadata": {}, "outputs": [], @@ -222,19 +432,43 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.12, Page Number: 438<h3>" + "source": [ + "<h3>Example 18.12, Page Number: 438<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to read to a file'''\n\n#Open a file, creating one if it does not already exist\nIn=open(\"test\",'r')\n\n#In case file cannot open\nif(not(In)):\n print \"Cannot open file.\"\nelse:\n #Read file\n i=In.read(2)\n ch=In.read(1)\n f=In.read(6)\n str=In.read()\n print i,f,ch\n print str\n #Close the file\n out.close()", + "input": [ + "\n", + "#Open a file, creating one if it does not already exist\n", + "In=open(\"test\",'r')\n", + "\n", + "#In case file cannot open\n", + "if(not(In)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " #Read file\n", + " i=In.read(2)\n", + " ch=In.read(1)\n", + " f=In.read(6)\n", + " str=In.read()\n", + " print i,f,ch\n", + " print str\n", + " #Close the file\n", + " out.close()" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "10 123.23 \n\nThis is a short text file.\n" + "text": [ + "10 123.23 \n", + "\n", + "This is a short text file.\n" + ] } ], "prompt_number": 9 @@ -242,19 +476,44 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.13, Page Number: 439<h3>" + "source": [ + "<h3>Example 18.13, Page Number: 439<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to read to a file provided on the screen'''\n#Program cannot be provided here, so error is obtained\n\nimport sys\n \nif not(len(sys.argv)==2):\n print \"Usage: PR <filename>\\n\"\nelse:\n #Open a file\n In=open(sys.argv[1],'r')\n\n #In case file cannot open\n if(not(In)):\n print \"Cannot open file.\"\n else:\n #Read file\n ch=In.read()\n print ch\n In.close()\n \n", + "input": [ + "\n", + "\n", + "import sys\n", + " \n", + "if not(len(sys.argv)==2):\n", + " print \"Usage: PR <filename>\\n\"\n", + "else:\n", + " #Open a file\n", + " In=open(sys.argv[1],'r')\n", + "\n", + " #In case file cannot open\n", + " if(not(In)):\n", + " print \"Cannot open file.\"\n", + " else:\n", + " #Read file\n", + " ch=In.read()\n", + " print ch\n", + " In.close()\n", + " \n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Usage: PR <filename>\n\n" + "text": [ + "Usage: PR <filename>\n", + "\n" + ] } ], "prompt_number": 10 @@ -262,12 +521,29 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.14, Page Number: 440<h3>" + "source": [ + "<h3>Example 18.14, Page Number: 440<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to write to a file'''\n\nimport sys\n\np=\"hello there\"\n\nout=open(\"test\",'w')\n\n#In case file cannot open\nif(not(out)):\n print \"Cannot open file.\"\nelse:\n #Write to file\n for i in range(len(p)):\n out.write(p[i])\n", + "input": [ + "\n", + "import sys\n", + "\n", + "p=\"hello there\"\n", + "\n", + "out=open(\"test\",'w')\n", + "\n", + "#In case file cannot open\n", + "if(not(out)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " #Write to file\n", + " for i in range(len(p)):\n", + " out.write(p[i])\n" + ], "language": "python", "metadata": {}, "outputs": [], @@ -276,19 +552,60 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.15, Page Number: 441<h3>" + "source": [ + "<h3>Example 18.15, Page Number: 441<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to read and write in a file'''\n\nimport sys\n\nn=[1,2,3,4,5]\n\n#Open a file 'test'\nout=open(\"test\",'w')\n\n#In case file cannot open\nif(not(out)):\n print \"Cannot open file.\"\nelse:\n #Write to file\n for i in range(5):\n out.write(chr(n[i]))\n out.close()\n \nfor i in range(5): #clear array\n n[i]=0\n \n#Open the file\nIn=open(\"test\",'r')\n\n#In case file cannot open\nif(not(In)):\n print \"Cannot open file.\"\nelse:\n #Read file\n for i in range(5):\n n[i]=ord(In.read(1))\n\n#Result, shows value from file\nfor i in range(5):\n print n[i],\n \nIn.close()", + "input": [ + "\n", + "import sys\n", + "\n", + "n=[1,2,3,4,5]\n", + "\n", + "#Open a file 'test'\n", + "out=open(\"test\",'w')\n", + "\n", + "#In case file cannot open\n", + "if(not(out)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " #Write to file\n", + " for i in range(5):\n", + " out.write(chr(n[i]))\n", + " out.close()\n", + " \n", + "for i in range(5): #clear array\n", + " n[i]=0\n", + " \n", + "#Open the file\n", + "In=open(\"test\",'r')\n", + "\n", + "#In case file cannot open\n", + "if(not(In)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " #Read file\n", + " for i in range(5):\n", + " n[i]=ord(In.read(1))\n", + "\n", + "#Result, shows value from file\n", + "for i in range(5):\n", + " print n[i],\n", + " \n", + "In.close()" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "1 2 3 4 5\n" + "text": [ + "1 2 3 4 5\n" + ] } ], "prompt_number": 12 @@ -296,19 +613,46 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.16, Page Number: 442<h3>" + "source": [ + "<h3>Example 18.16, Page Number: 442<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Detect end-of-file for a file on the screen'''\n#File cannot be provided here, so program wont work\nimport sys\n \nif not(len(sys.argv)==2):\n print \"Usage: PR <filename>\\n\"\nelse:\n #Open a file\n In=open(sys.argv[1],'r')\n\n #In case file cannot open\n if(not(In)):\n print \"Cannot open file.\"\n else:\n #Read file\n while True:\n ch=In.read(1)\n if not ch:\n break\n print ch,\n #Close file\n In.close()\n ", + "input": [ + "import sys\n", + " \n", + "if not(len(sys.argv)==2):\n", + " print \"Usage: PR <filename>\\n\"\n", + "else:\n", + " #Open a file\n", + " In=open(sys.argv[1],'r')\n", + "\n", + " #In case file cannot open\n", + " if(not(In)):\n", + " print \"Cannot open file.\"\n", + " else:\n", + " #Read file\n", + " while True:\n", + " ch=In.read(1)\n", + " if not ch:\n", + " break\n", + " print ch,\n", + " #Close file\n", + " In.close()\n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Usage: PR <filename>\n\n" + "text": [ + "Usage: PR <filename>\n", + "\n" + ] } ], "prompt_number": 13 @@ -316,19 +660,74 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.17, Page Number: 443<h3>" + "source": [ + "<h3>Example 18.17, Page Number: 443<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to compare files'''\n\n#Since file names cannot be provided, two \n#files are being created test1 and test2\n\n#creating test1\nout=open(\"test1\",'w')\nout.write(\"Hello\")\nout.close()\n\n#creating test2\nout=open(\"test2\",'w')\nout.write(\"There\")\nout.close()\n\n\n#Open test1\nf1=open(\"test1\",'r')\n#In case file cannot open\nif(not(In)):\n print \"Cannot open file.\"\n\n#Open test2\nf2=open(\"test2\",'r')\n#In case file cannot open\nif(not(In)):\n print \"Cannot open file.\"\n \nprint \"Comparing files...\"\n\nbuf1=f1.read()\nbuf2=f2.read()\nprint buf1,buf2\n\nif len(buf1)==len(buf2):\n print \"Files are of different sizes.\"\n f1.close()\n f2.close()\nelse:\n #compare contents of buffers\n flag=1\n for i in range(len(buf1)):\n if not(buf1[i]==buf2[i]):\n print \"Files differ.\"\n f1.close()\n f2.close()\n flag=0\n break\n if flag==1:\n print \"Files are the same.\"\n \n ", + "input": [ + "\n", + "#creating test1\n", + "out=open(\"test1\",'w')\n", + "out.write(\"Hello\")\n", + "out.close()\n", + "\n", + "#creating test2\n", + "out=open(\"test2\",'w')\n", + "out.write(\"There\")\n", + "out.close()\n", + "\n", + "\n", + "#Open test1\n", + "f1=open(\"test1\",'r')\n", + "#In case file cannot open\n", + "if(not(In)):\n", + " print \"Cannot open file.\"\n", + "\n", + "#Open test2\n", + "f2=open(\"test2\",'r')\n", + "#In case file cannot open\n", + "if(not(In)):\n", + " print \"Cannot open file.\"\n", + " \n", + "print \"Comparing files...\"\n", + "\n", + "buf1=f1.read()\n", + "buf2=f2.read()\n", + "print buf1,buf2\n", + "\n", + "if len(buf1)==len(buf2):\n", + " print \"Files are of different sizes.\"\n", + " f1.close()\n", + " f2.close()\n", + "else:\n", + " #compare contents of buffers\n", + " flag=1\n", + " for i in range(len(buf1)):\n", + " if not(buf1[i]==buf2[i]):\n", + " print \"Files differ.\"\n", + " f1.close()\n", + " f2.close()\n", + " flag=0\n", + " break\n", + " if flag==1:\n", + " print \"Files are the same.\"\n", + " \n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Comparing files...\nHello There\nFiles are of different sizes.\n" + "text": [ + "Comparing files...\n", + "Hello There\n", + "Files are of different sizes.\n" + ] } ], "prompt_number": 14 @@ -336,19 +735,32 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.18, Page Number: 445<h3>" + "source": [ + "<h3>Example 18.18, Page Number: 445<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Read a string and print it'''\n\nprint \"Enter your name:\"\n\n#User imput\nstr=\"hello world\"\n\nprint str", + "input": [ + "\n", + "print \"Enter your name:\"\n", + "\n", + "#User imput\n", + "str=\"hello world\"\n", + "\n", + "print str" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Enter your name:\nhello world\n" + "text": [ + "Enter your name:\n", + "hello world\n" + ] } ], "prompt_number": 15 @@ -356,12 +768,29 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.19, Page Number: 447<h3>" + "source": [ + "<h3>Example 18.19, Page Number: 447<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Demonstrate random access by writing X at a specified location'''\n\n#Since arguments cannot be provided file test \n#is created and X is written in the 3nd location.\n\n#Open test\nout=open(\"test\",'r+b')\nout.write(\"Hello\")\n\n\n#In case file cannot open\nif(not(out)):\n print \"Cannot open file.\"\nelse:\n out.seek(2,0)\n out.write('X')\n out.close()\n \n", + "input": [ + "\n", + "#Open test\n", + "out=open(\"test\",'r+b')\n", + "out.write(\"Hello\")\n", + "\n", + "\n", + "#In case file cannot open\n", + "if(not(out)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " out.seek(2,0)\n", + " out.write('X')\n", + " out.close()\n", + " \n" + ], "language": "python", "metadata": {}, "outputs": [], @@ -370,19 +799,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.20, Page Number: 447<h3>" + "source": [ + "<h3>Example 18.20, Page Number: 447<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Display a file from a given point'''\n\n#Here, file is displayed from 3nd position\n\n#Open test\nout=open(\"test\",'r+b')\nout.write(\"Hello\")\nout.close()\n\nIn=open(\"test\",'r')\n#In case file cannot open\nif(not(In)):\n print \"Cannot open file.\"\nelse:\n In.seek(2,0)\n ch=In.read()\n print ch\n \n", + "input": [ + "\n", + "#Open test\n", + "out=open(\"test\",'r+b')\n", + "out.write(\"Hello\")\n", + "out.close()\n", + "\n", + "In=open(\"test\",'r')\n", + "#In case file cannot open\n", + "if(not(In)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " In.seek(2,0)\n", + " ch=In.read()\n", + " print ch\n", + " \n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "llo\n" + "text": [ + "llo\n" + ] } ], "prompt_number": 3 @@ -390,12 +839,41 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 18.21, Page Number: 450<h3>" + "source": [ + "<h3>Example 18.21, Page Number: 450<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Implement use of overloaded inserter to write three_d'''\n\nclass three_d:\n def __init__(self,a,b,c):\n self.__x=a\n self.__y=b\n self.__z=c\n def __repr__(self):\n c=(\"%d\"%self.__x)+\", \"+(\"%d\"%self.__y)+\", \"+(\"%d\"%self.__z)+\"\\n\"\n return c \n\n#Variable declaration\na=three_d(1,2,3)\nb=three_d(3,4,5)\nc=three_d(5,6,7)\n\n#Open threed\nout=open(\"threed\",'w')\n#In case file cannot open\nif(not(out)):\n print \"Cannot open file.\"\nelse:\n out.write(a.__repr__())\n out.write(b.__repr__())\n out.write(c.__repr__())\n\n ", + "input": [ + "\n", + "class three_d:\n", + " def __init__(self,a,b,c):\n", + " self.__x=a\n", + " self.__y=b\n", + " self.__z=c\n", + " def __repr__(self):\n", + " c=(\"%d\"%self.__x)+\", \"+(\"%d\"%self.__y)+\", \"+(\"%d\"%self.__z)+\"\\n\"\n", + " return c \n", + "\n", + "#Variable declaration\n", + "a=three_d(1,2,3)\n", + "b=three_d(3,4,5)\n", + "c=three_d(5,6,7)\n", + "\n", + "#Open threed\n", + "out=open(\"threed\",'w')\n", + "#In case file cannot open\n", + "if(not(out)):\n", + " print \"Cannot open file.\"\n", + "else:\n", + " out.write(a.__repr__())\n", + " out.write(b.__repr__())\n", + " out.write(c.__repr__())\n", + "\n", + " " + ], "language": "python", "metadata": {}, "outputs": [], @@ -404,7 +882,7 @@ { "cell_type": "raw", "metadata": {}, - "source": "" + "source": [] } ], "metadata": {} |