<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><!--Online Python Tutorhttps://github.com/pgbovine/OnlinePythonTutor/Copyright (C) Philip J. Guo (philip@pgbovine.net)Permission is hereby granted, free of charge, to any person obtaining acopy of this software and associated documentation files (the"Software"), to deal in the Software without restriction, includingwithout limitation the rights to use, copy, modify, merge, publish,distribute, sublicense, and/or sell copies of the Software, and topermit persons to whom the Software is furnished to do so, subject tothe following conditions:The above copyright notice and this permission notice shall be includedin all copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESSOR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OFMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANYCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THESOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.--><head><title>Online Python Tutor - Composing Programs - Python 3</title><meta http-equiv="Content-type" content="text/html; charset=UTF-8"/><!-- requirements for pytutor.js --><script type="text/javascript" src="js/d3.v2.min.js"></script><script type="text/javascript" src="js/jquery-1.8.2.min.js"></script><script type="text/javascript" src="js/jquery.ba-bbq.min.js"></script> <!-- for handling back button and URL hashes --><script type="text/javascript" src="js/jquery.ba-dotimeout.min.js"></script> <!-- for event debouncing --><script type="text/javascript" src="js/jquery.jsPlumb-1.3.10-all-min.js "></script> <!-- for rendering SVG connectorsDO NOT UPGRADE ABOVE 1.3.10 OR ELSE BREAKAGE WILL OCCUR --><script type="text/javascript" src="js/diff_match_patch.js"></script><script type="text/javascript" src="js/jquery-ui-1.11.4/jquery-ui.min.js"></script> <!-- for sliders and other UI elements --><link type="text/css" href="js/jquery-ui-1.11.4/jquery-ui.css" rel="stylesheet" /><script type="text/javascript" src="js/pytutor.js"></script><link rel="stylesheet" href="css/pytutor.css"/><link rel="stylesheet" href="css/composingprograms.css"/> <!-- include AFTER pytutor.css --><!-- requirements for opt-frontend.js --><!-- Ace online code editor --><script type="text/javascript" src="js/ace/src-min-noconflict/ace.js" charset="utf-8"></script><script type="text/javascript" src="js/opt-frontend-common.js"></script><script type="text/javascript" src="js/composingprograms.js"></script><link rel="stylesheet" href="css/opt-frontend.css"/><!-- include this AFTER opt-frontend.js so that configurationglobal variables are already defined at load time --><script type="text/javascript" src="js/togetherjs/togetherjs-min.js"></script><!-- insert google-analytics.txt contents here --></head><body><table id="experimentalHeader"><tr><td valign="top"><div id="signinButton" style="font-size: 8pt;"><div style="width: 200px; margin-bottom: 8px;">[Optional] Sign in with either a Berkeley email or Google account</div><spanclass="g-signin"data-callback="signinCallback"data-clientid="639826413051-n4c566bfu9jnee6893qolvbt8od9kiaf.apps.googleusercontent.com"data-cookiepolicy="single_host_origin"data-requestvisibleactions="http://schemas.google.com/AddActivity"data-scope="https://www.googleapis.com/auth/plus.profile.emails.read"></span></div><div id="loggedInDiv" style="display: none; margin-bottom: 8px;"><div id="loggedInNameDisplay"></div><button id="signoutButton" style="font-size: 8pt; margin-top: 5px;">Sign out to chat anonymously</button></div><div id="ssDiv"><button id="sharedSessionBtn" type="button" class="togetherjsBtn">Start shared session</button><div style="font-size: 8pt; margin-left: 2px; margin-top: 3px;"><a href="https://www.youtube.com/watch?v=Z2TIjNArOK4" target="_blank">What are shared sessions?</a></div></div><div id="sharedSessionDisplayDiv" style="display: none;"><button id="stopTogetherJSBtn" type="button" class="togetherjsBtn">End shared session</button><div style="width: 200px; font-size: 8pt; color: #666; margin-top: 5px;">Your chat logs and code may be recorded, anonymized, and analyzed for research.</div></div></td><td valign="top" style="padding-left: 20px;"><div id="togetherjsStatus"></div><div id="surveyHeader" style="display: none;"></div></td></tr></table><div id="pyInputPane"><div id="codeInputWarnings">Write Python code here:</div><div id="someoneIsTypingDiv" style="color: #e93f34; font-weight: bold; display: none;">Someone is typing ...</div><div id="codeInputPane"></div> <!-- populate with a CodeMirror instance --><div id="frontendErrorOutput"></div><div id="surveyPane"></div><p><button id="executeBtn" class="bigBtn" type="button">Visualize Execution</button></p><p style="margin-top: 20px; line-height: 200%;">Execute code using<select id="pythonVersionSelector"><option value="3">Python 3.3</option></select>and<select id="cumulativeModeSelector"><option value="true">display frames of exited functions.</option><option value="false">don't display exited functions.</option></select></p></div><div id="pyOutputPane"></div><div id="footer"><p><button id="genUrlBtn" class="smallBtn" type="button">Generate permanent link</button> <input type="text" id="urlOutput" size="70"/></p><p>Click the button above to create a permanent link to yourvisualization. To report a bug, paste the link along with a brief errordescription in an email addressed to philip@pgbovine.net</p><p>This version of <a href="http://pythontutor.com/">Online Python Tutor</a> supports<a href="http://www.python.org/doc/3.3.0/">Python 3.3</a> with limited moduleimports and no file I/O.The following modules may be imported:bisect,collections,copy,datetime,functools,hashlib,heapq,itertools,json,math,operator,random,re,string,time,io.</p><p>Have a question? Maybe the <ahref="https://github.com/pgbovine/OnlinePythonTutor/blob/master/v3/docs/user-FAQ.md">FAQ</a>or other <ahref="https://github.com/pgbovine/OnlinePythonTutor/blob/master/v3/docs/">documentation</a>can help. Or check out its code at <ahref="https://github.com/pgbovine/OnlinePythonTutor/">GitHub</a>.</p><p>By using Online Python Tutor, your visualized code, options, and IPaddress are logged on our server and may be analyzed for researchpurposes. Nearly all Web services collect this basic information fromusers. However, Online Python Tutor does not collect any personalinformation, cookies, or session state from users.</p><p style="margin-top: 8px;">Copyright © <a href="http://www.pgbovine.net/">Philip Guo</a>. All rights reserved.</p></div><!-- Place this asynchronous JavaScript just before your </body> tag --><script type="text/javascript">(function() {var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;po.src = 'https://apis.google.com/js/client:plusone.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);})();</script></body></html>
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