{"id":19510,"date":"2018-08-06T10:30:40","date_gmt":"2018-08-06T05:00:40","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=19510"},"modified":"2019-01-24T17:08:07","modified_gmt":"2019-01-24T11:38:07","slug":"cbse-revision-notes-class-11-computer-science-python","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/","title":{"rendered":"CBSE Revision Notes Class 11 Computer Science Python"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#CBSE_Revision_Notes_Class_11_Computer_Science_Python\" >CBSE Revision Notes Class 11 Computer Science Python<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#CBSE_chapter-wise_notes_cover_the_whole_syllabus_and_include\" >CBSE chapter-wise notes\u00a0cover\u00a0the whole syllabus and include:<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#1Programming_and_Computational_Thinking_1-37\" >1.Programming and Computational Thinking ..1-37<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#2Computer_Systems_and_Organisation_38-59\" >2.Computer Systems and Organisation .. 38-59<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#3Data_Management_60-70\" >3.Data Management .. 60-70<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#4_Society_Law_and_Ethics_Cyber_safety_71-82\" >4. Society Law and Ethics Cyber safety .. 71-82<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#Revision_Notes_Class_11_Computer_Science_Python_%E2%80%93_Free_PDF_Download\" >Revision Notes Class 11 Computer Science Python &#8211; Free PDF Download<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#Basic_Python_Programming_and_Simple_Data_Types\" >Basic Python Programming and Simple Data Types:<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#Familiarization_with_the_basics_of_Python_programming\" >Familiarization with the basics of Python programming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#IDLEs_interactive_shell\" >IDLE\u2019s interactive shell:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#Print%E2%80%9CThis_is_my_first_program%E2%80%9D\" >Print(\u201cThis is my\u00a0 first program\u201d)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#Simple_Data-Types\" >Simple Data-Types<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/#CBSE_Class_11_Revision_Notes_and_Key_Points\" >CBSE Class 11 Revision Notes and Key Points<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>CBSE Revision Notes Class 11 Computer Science Python<\/strong> in PDF format covers the new syllabus of computer science (python).\u00a0You will get download link immediately after online payment.<\/p>\n<ul>\n<li><strong>Class :\u00a0<\/strong>11 CBSE<\/li>\n<li><strong>Subject:\u00a0<\/strong>Computer Science (Python)<\/li>\n<li><strong>Product:<\/strong>\u00a0Revision Notes<\/li>\n<\/ul>\n<p>C<strong>BSE Revision Notes Class 11 Computer Science Python<\/strong> in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Computer Science Python class 11 Notes Computer Science latest chapter wise notes for quick preparation of CBSE exams and school-based annual examinations. Class 11 Computer Science notes on Python class 11 Notes Computer Science are also available for download in CBSE Guide website.<\/p>\n<p style=\"text-align: center;\"><strong>Revision Notes Class 11 Python\u00a0<a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-11-computer-science\/1852\/cbse-revision-notes\/7\/\">Download as PDF<\/a><\/strong><\/p>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/notes.png\" alt=\"CBSE Revision Notes Class 11 Computer Science Python\" width=\"136\" height=\"136\" \/><\/h3>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Revision_Notes_Class_11_Computer_Science_Python\"><\/span>CBSE Revision Notes Class 11 Computer Science Python<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE\u00a0Python Notes which covers the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 11 Computer Science textbook. Users can download CBSE guide quick revision notes from myCBSEguide mobile app and my CBSE guide website.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"CBSE_chapter-wise_notes_cover_the_whole_syllabus_and_include\"><\/span>CBSE chapter-wise notes\u00a0cover\u00a0the whole syllabus and include:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1Programming_and_Computational_Thinking_1-37\"><\/span><strong>1.Programming and Computational Thinking ..1-37<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Basic Python Programming and Simple Data Types<\/li>\n<li>Variables and Manipulating Methods<\/li>\n<li>Data Types and Operators<\/li>\n<li>Conditional Statements and Simple Programs<\/li>\n<li>Iterative computation and control flow<\/li>\n<li>Debugging<\/li>\n<li>Lists, tuples and dictionary<\/li>\n<li>Sorting algorithm<\/li>\n<li>Strings<\/li>\n<\/ol>\n<h4><span class=\"ez-toc-section\" id=\"2Computer_Systems_and_Organisation_38-59\"><\/span><strong>2.Computer Systems and Organisation .. 38-59<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Basic computer organization<\/li>\n<li>Types of Software<\/li>\n<li>Language of Bits and Boolean logic<\/li>\n<li>Information representation and Strings<\/li>\n<li>Execution of Program, Interpreters, and OS<\/li>\n<li>Concept of cloud computing<\/li>\n<\/ol>\n<h4><span class=\"ez-toc-section\" id=\"3Data_Management_60-70\"><\/span><strong>3.Data Management .. 60-70<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Database<\/li>\n<li>SQL Commands<\/li>\n<li>Basics of NoSQL Databases<\/li>\n<\/ol>\n<h4><span class=\"ez-toc-section\" id=\"4_Society_Law_and_Ethics_Cyber_safety_71-82\"><\/span><strong>4. Society Law and Ethics Cyber safety .. 71-82<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Cyber safety<\/li>\n<li>Appropriate usage of social networks<\/li>\n<li>Safely accessing websites<\/li>\n<li>Safely communicating data<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/shop\/product\/64\/\">Buy all Notes Download as PDF<\/a><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Revision_Notes_Class_11_Computer_Science_Python_%E2%80%93_Free_PDF_Download\"><\/span>Revision Notes Class 11 Computer Science Python &#8211; Free PDF Download<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Basic_Python_Programming_and_Simple_Data_Types\"><\/span><strong>Basic Python Programming and Simple Data Types:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Familiarization_with_the_basics_of_Python_programming\"><\/span><strong>Familiarization with the basics of Python programming<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Guido van Rossum created the Python programming language in the late 1980s. In contrast to other popular languages such as C, C++, Java, and C#, Python strives to provide a simple but powerful syntax. Python is used for software development at companies and organizations such as Google, Yahoo, and NASA.<\/p>\n<p><strong>Simple Hello program: <\/strong>Python programs must be written with a particular structure. The syntax must be correct, or the interpreter will generate error messages and not execute the program. When we want to write a program, we use a text editor to write the Python instructions into a file, which is called a script. By convention, Python scripts have names that end with .py. For example, we will name our first program as \u201chello.py\u201d.<\/p>\n<p>&gt;&gt;print(\u201cThis is my first program\u201d)<\/p>\n<p>We will consider two ways in which we can run \u201chello.py\u201d:<\/p>\n<ol>\n<li>Enter the program directly into IDLE\u2019s interactive shell<\/li>\n<li>Enter the program into IDLE\u2019s editor, save it, and run it.<\/li>\n<\/ol>\n<h4><span class=\"ez-toc-section\" id=\"IDLEs_interactive_shell\"><\/span><strong>IDLE\u2019s interactive shell<\/strong>:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>IDLE is a simple Python integrated development environment available for Windows, Linux, and Mac OS X. To open IDLE interactive shell \u201cGoto start menu on windows -&gt; open IDLE\u201d. You may type the above one-line Python program directly into IDLE and press enter to execute the program. Since it does not provide a way to save the code you enter, the interactive shell is not the best tool for writing larger programs. The IDLE interactive shell is useful for experimenting with small snippets of Python code.<\/p>\n<p><strong>IDLE\u2019s editor:<\/strong> IDLE has a built-in editor. From the IDLE menu, select New Window, Type the text <strong>print(\u201cThis is my first program\u201d)<\/strong>\u00a0 into the editor. You can save your program using the Save option in the File menu. Save the code to a file named \u201chello.py\u201d. The extension .py is the extension used for Python source code. We can run the program from within the IDLE editor by pressing the F5 function key or from the editor\u2019s Run menu: Run -&gt; Run Module. The output appears in the IDLE interactive shell window.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Print%E2%80%9CThis_is_my_first_program%E2%80%9D\"><\/span><strong>Print(\u201cThis is my\u00a0 first program\u201d)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>This is a Python statement. A statement is a command that the interpreter executes. This statement prints the message \u201cThis is my first program\u201d on the screen. A statement is the fundamental unit of execution in a Python program. Statements may be grouped into larger chunks called blocks, and blocks can make up more complex statements.<\/p>\n<p>The statement print(\u201cThis is my first program\u201d) makes use of a built-in function named \u201cprint\u201d. Python has a variety of different kinds of statements that may be used to build programs.<\/p>\n<p>**We generally write a computer program using a high-level language. A high-level language is one which is understandable by us humans. It contains words and phrases from the English (or other) language. But a computer does not understand high-level language. It only understands program written in\u00a00\u2019s\u00a0and 1 \u2019s in binary, called the machine code. A program written in the high-level language is called a source code. We need to convert the source code into machine code and this is accomplished by compilers and interpreters. Hence, a compiler or an interpreter is a program that converts program written in high-level language into machine code understood by the computer.<br \/>\n**Interpreter: Interpreter executes one statement at a time.<br \/>\n**Compiler: Compiler scans the entire program and translates it as a whole into machine code.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Simple_Data-Types\"><\/span><strong>Simple Data-Types <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>A data type, in programming, is a classification that specifies which type of value a variable has and what type of mathematical, relational or logical operations can be applied to it without causing an error. A string, for example, is a data type that is used to classify text and an integer is a data type used to classify whole numbers.<\/p>\n<p>Some basic data types that python support are integer, float, string.<\/p>\n<p><strong>Integer (int): <\/strong>Int, or integer, is a whole number, positive or negative, without decimals, of unlimited length<strong>. <\/strong>The number four (4) is an example of a numeric value. In mathematics, 4 is an integer value. Integers are whole numbers, which means they have no fractional parts, and they can be positive, negative, or zero. Examples of integers include 4, \u221219, 0, and \u22121005. In contrast, 4.5 is not an integer, since it is not a whole number. Python supports a number of numeric and non-numeric values. In particular, Python programs can use integer values. Let\u2019s take an example integer.py<\/p>\n<p>X=10<\/p>\n<p>Y=223313445534<\/p>\n<p>Z=-987<\/p>\n<p>Print(X)<\/p>\n<p>Print(Y)<\/p>\n<p>Print(Z)<\/p>\n<p>Print(X+Y+Z)<\/p>\n<p>In above program, there are three variable holding integer values in x,y, and z. Then there are three print statements which will display the three integer variables and last print statement will display addition of all the 3 numbers that are in the variables.<\/p>\n<p><strong>Float: <\/strong>Many computational tasks require numbers that have fractional parts. For example, to compute the area of a circle given the circle\u2019s radius, the value pi, or approximately 3.14159 is used. Python supports such non-integer numbers, and they are called floating point numbers. The name implies that during mathematical calculations the decimal point can move or \u201cfloat\u201d to various positions within the number to maintain the proper number of significant digits. The Python name for the floating-point type is float. Let\u2019s take an example of float in this program we will calculate area of circle<\/p>\n<p>PI=3.14<\/p>\n<p>Radius=5.5<\/p>\n<p>Area=PI*Radius*Radius<\/p>\n<p>Print(\u2018Area of circle is \u2018, Area)<\/p>\n<p>In the above example we are taking 3 float variables PI Radius and area. In a statement Area=PI*Radius*radius, we are calculating the area of circle and putting the value in variable area. Then in print statement, we are printing the area of circle with a message.<\/p>\n<p><strong>String:<\/strong> String literals in python are surrounded by either single quotation marks or double quotation marks. \u2018hello\u2019\u00a0is the same as \u201chello\u201d. String variable holds the text.<br \/>\nLet\u2019s take an example in this example we will see how to print string variables and how to take input from the user.<\/p>\n<p>x=&#8221;hello&#8221;<br \/>\nprint(&#8220;Enter text&#8221;)<br \/>\ny=input()<br \/>\nprint(x,y)<\/p>\n<p>In above program, there are 2 variables x and y. x is holding the string \u201chello\u201d and y will take text from the keyboard at run time and next line will print both the strings.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_11_Revision_Notes_and_Key_Points\"><\/span>CBSE Class 11 Revision Notes and Key Points<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE Revision Notes Class 11 Computer Science Python note for class 11 Mathematics, Physics, Chemistry, Computer Science and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-physics\/1340\/cbse-revision-notes\/7\/\"> Physics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-chemistry\/1356\/cbse-revision-notes\/7\/\">Chemistry<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-mathematics\/1371\/cbse-revision-notes\/7\/\">Mathematics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-biology\/1388\/cbse-revision-notes\/7\/\">Biology<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-accountancy\/1411\/cbse-revision-notes\/7\/\">Accountancy<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-economics\/1423\/cbse-revision-notes\/7\/\">Economics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-business-studies\/1740\/cbse-revision-notes\/7\/\">Business Studies<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-computer-science\/1852\/cbse-revision-notes\/7\/\">Computer Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-informatics-practices\/1874\/cbse-revision-notes\/7\/\">Informatics Practices<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-11-geography\/1864\/cbse-revision-notes\/7\/\">Geography<\/a><\/li>\n<\/ul>\n<p>To download CBSE Revision Notes Class 11 Computer Science Python, sample paper for class 11 Chemistry, Physics, Computer Science, History, Political Science, Computer Science, Geography, Computer Science, Home Science, Accountancy, Computer Science and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CBSE Revision Notes Class 11 Computer Science Python in PDF format covers the new syllabus of computer science (python).\u00a0You will get download link immediately after online payment. Class :\u00a011 CBSE Subject:\u00a0Computer Science (Python) Product:\u00a0Revision Notes CBSE Revision Notes Class 11 Computer Science Python in PDF are available for free download in myCBSEguide mobile app. The &#8230; <a title=\"CBSE Revision Notes Class 11 Computer Science Python\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-revision-notes-class-11-computer-science-python\/\" aria-label=\"More on CBSE Revision Notes Class 11 Computer Science Python\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":-1,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1346,1425,456],"tags":[491,1541,1449,326,1548],"class_list":["post-19510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbse","category-computer-science","category-revision-notes","tag-cbse-key-notes","tag-cbse-revision-notes","tag-class-11","tag-computer-science","tag-computer-science-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CBSE Revision Notes Class 11 Computer Science Python<\/title>\n<meta name=\"description\" content=\"CBSE Revision Notes Class 11 Computer Science Python in PDF format for free download. 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