Exercise 5.3<\/title>\n <link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/codemirror.min.css\" \/>\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/theme\/eclipse.min.css\" \/>\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/font-awesome\/6.4.0\/css\/all.min.css\">\n\n<style>\n \/* Wrapper to protect styles *\/\n .py-receipt-wrapper {\n \/* Local CSS Variables *\/\n --py-bg-app: #f9fafb;\n --py-bg-panel: #ffffff;\n --py-border: #e5e7eb;\n --py-text-primary: #1f2937;\n --py-text-secondary: #6b7280;\n --py-primary-blue: #2563eb;\n --py-primary-hover: #1d4ed8;\n --py-header-height: 50px;\n --py-footer-height: 60px;\n\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif;\n background-color: var(--py-bg-app);\n color: var(--py-text-primary);\n width: 100%;\n border: 1px solid var(--py-border);\n box-sizing: border-box;\n }\n\n .py-receipt-wrapper * { box-sizing: border-box; }\n\n \/* --- NEW TOP NAV (DESKTOP) --- *\/\n .py-receipt-top-nav {\n display: flex;\n align-items: center;\n justify-content: space-between;\n height: var(--py-header-height);\n padding: 0 20px;\n background: var(--py-bg-panel);\n border-bottom: 1px solid var(--py-border);\nmin-width: 100%;\n }\n .py-receipt-nav-title {\n font-weight: 600;\n color: var(--py-text-secondary);\n font-size: 14px;\n }\n\n \/* --- LAYOUT --- *\/\n .py-receipt-ide-container {\n display: flex; \n height: 100%; \n min-width: 100%;\n background: white;\n overflow: hidden; \n }\n\n \/* --- LEFT PANE --- *\/\n .py-receipt-left-pane {\n width: 45%; \n border-right: 1px solid var(--py-border);\n background: var(--py-bg-panel); \n display: flex; \n flex-direction: column;\n }\n\n .py-receipt-tabs-header {\n height: var(--py-header-height); \n border-bottom: 1px solid var(--py-border);\n display: flex; \n align-items: center; \n padding: 0 20px; \n gap: 25px;\n font-size: 14px; \n font-weight: 500; \n color: var(--py-text-secondary);\n }\n \n .py-receipt-tab-item { cursor: pointer; padding: 14px 0; border-bottom: 2px solid transparent; }\n .py-receipt-tab-item.active { color: var(--py-text-primary); border-bottom-color: var(--py-primary-blue); }\n .py-receipt-tab-item:hover { color: var(--py-text-primary); }\n\n .py-receipt-pane-content { flex: 1; overflow-y: auto; padding: 25px; display: none; }\n .py-receipt-pane-content.active { display: block; }\n\n \/* Scoped Typography *\/\n .py-receipt-wrapper h1 { margin-top: 0; font-size: 22px; font-weight: 600; color: var(--py-text-primary); margin-bottom: 1rem; }\n .py-receipt-wrapper p { line-height: 1.6; color: #374151; margin-bottom: 1rem; }\n .py-receipt-wrapper ul { margin-bottom: 20px; color: #374151; line-height: 1.6; padding-left: 20px; }\n .py-receipt-wrapper li { margin-bottom: 5px; }\n .py-receipt-wrapper h3 { font-size: 16px; margin-top: 15px; margin-bottom: 10px; }\n\n .py-receipt-solution-block {\n background: #f8f9fa; border: 1px solid var(--py-border); padding: 15px;\n border-radius: 6px; font-family: 'Consolas', monospace; font-size: 14px;\n color: #333; white-space: pre-wrap; overflow-x: auto;\n }\n \n .py-receipt-sample-box { background-color: #f3f4f6; border: 1px solid var(--py-border); border-radius: 6px; margin-top: 20px; overflow: hidden; }\n .py-receipt-sample-header { display: flex; background-color: #e5e7eb; font-size: 13px; font-weight: 600; color: var(--py-text-primary); }\n .py-receipt-sample-col-title { width: 50%; padding: 8px 15px; border-right: 1px solid #d1d5db; }\n .py-receipt-sample-col-content { width: 50%; padding: 15px; font-family: 'Consolas', monospace; font-size: 14px; border-right: 1px solid var(--py-border); white-space: pre-wrap; color: #333; }\n .py-receipt-sample-body { display: flex; }\n\n \/* --- RIGHT PANE --- *\/\n .py-receipt-right-pane {\n width: 55%; display: flex; flex-direction: column; background: var(--py-bg-panel);\n }\n\n .py-receipt-editor-top-bar {\n height: var(--py-header-height); border-bottom: 1px solid var(--py-border);\n display: flex; align-items: center; justify-content: space-between;\n padding: 0 15px; background-color: #f9fafb;\n }\n\n .py-receipt-lang-label { font-weight: 600; font-size: 14px; background: #e5e7eb; padding: 4px 12px; border-radius: 4px; }\n .py-receipt-editor-settings i { color: var(--py-text-secondary); margin-left: 15px; cursor: pointer; font-size: 16px; }\n\n .py-receipt-code-area { flex: 1; display: flex; flex-direction: column; position: relative; }\n \/* Force CodeMirror to fit flex container *\/\n .py-receipt-code-area .CodeMirror { flex: 1; height: 100%; position: absolute; top: 0; bottom: 0; left: 0; right: 0; font-family: 'Source Code Pro', monospace; font-size: 15px; }\n\n .py-receipt-console-section {\n border-top: 1px solid var(--py-border); background: #f9fafb;\n display: flex; flex-direction: column; height: 35%;\n }\n .py-receipt-console-header { padding: 8px 15px; background: #e5e7eb; font-size: 12px; font-weight: 600; color: var(--py-text-secondary); text-transform: uppercase; }\n .py-receipt-console-body { display: flex; flex: 1; overflow: hidden; }\n .py-receipt-input-wrapper, .py-receipt-output-wrapper { flex: 1; display: flex; flex-direction: column; padding: 10px; border-right: 1px solid var(--py-border); }\n .py-receipt-output-wrapper { border-right: none; }\n .py-receipt-console-label { font-size: 12px; font-weight: 600; margin-bottom: 5px; color: var(--py-text-secondary); }\n \n textarea.py-receipt-custom-input-area { flex: 1; border: 1px solid var(--py-border); border-radius: 4px; resize: none; padding: 8px; font-family: monospace; width: 100%; }\n .py-receipt-output-display { flex: 1; background: white; border: 1px solid var(--py-border); border-radius: 4px; padding: 8px; font-family: monospace; white-space: pre-wrap; overflow-y: auto; font-size: 13px; }\n\n \/* --- FOOTER ACTIONS (Desktop) --- *\/\n .py-receipt-footer-actions {\n height: var(--py-footer-height);\n border-top: 1px solid var(--py-border);\n display: flex;\n align-items: center;\n \/* Aligns Reset\/Run to the left naturally if siblings are hidden *\/\n justify-content: flex-end; \n padding: 0 20px;\n background-color: var(--py-bg-panel);\n }\n\n .py-receipt-execution-group { display: flex; gap: 12px; align-items: center; }\n\n .py-receipt-btn {\n padding: 8px 20px;\n border-radius: 4px;\n font-size: 14px;\n font-weight: 600;\n cursor: pointer;\n text-decoration: none;\n display: inline-flex;\n align-items: center;\n justify-content: center;\n transition: 0.2s;\n height: 38px;\n box-shadow: none;\n border: none;\n }\n\n .py-receipt-btn-secondary { background: transparent; border: 1px solid var(--py-border); color: var(--py-text-primary); }\n .py-receipt-btn-secondary:hover { background: #f3f4f6; }\n\n .py-receipt-btn-primary { background: var(--py-primary-blue); border: 1px solid var(--py-primary-blue); color: white; }\n .py-receipt-btn-primary:hover { background: var(--py-primary-hover); }\n\n .py-receipt-spinner {\n display: none; width: 14px; height: 14px;\n border: 2px solid #fff; border-top-color: transparent;\n border-radius: 50%; animation: py-receipt-spin 0.8s linear infinite; margin-left: 8px;\n }\n @keyframes py-receipt-spin { 100% { transform: rotate(360deg); } }\n\n .py-receipt-hidden { display: none !important; }\n\n \/* Hide Mobile Buttons on Desktop *\/\n .py-receipt-btn-mobile { display: none !important; }\n\n \/* --- MOBILE RESPONSIVE FIX --- *\/\n @media (max-width: 768px) {\n \/* Hide Top Nav on Mobile *\/\n .py-receipt-top-nav { display: none; }\n\n .py-receipt-ide-container { flex-direction: column; overflow-y: auto; height: auto; }\n .py-receipt-left-pane, .py-receipt-right-pane { width: 100%; height: auto; }\n \n \/* 1. Left Pane *\/\n .py-receipt-left-pane { \n border-right: none; \n border-bottom: 8px solid #f3f4f6; \n min-height: auto;\n max-height: 400px;\n }\n \n \/* 2. Right Pane: Flex Column for ordering *\/\n .py-receipt-right-pane { display: flex; flex-direction: column; }\n \n \/* 3. Unwrap Console\/Footer to shuffle children *\/\n .py-receipt-console-section, \n .py-receipt-console-body,\n .py-receipt-footer-actions { \n display: contents; \n }\n \n .py-receipt-console-header { display: none; }\n\n \/* --- ORDERING LOGIC --- *\/\n\n \/* Order 1: Top Bar *\/\n .py-receipt-editor-top-bar { order: 1; }\n \n \/* Order 2: Code Editor *\/\n .py-receipt-code-area { \n order: 2; \n height: 500px; \n } \n .py-receipt-code-area .CodeMirror { position: relative; height: 500px; }\n\n \/* Order 3: Input Area (Top of bottom section) *\/\n .py-receipt-input-wrapper { \n order: 3;\n width: 100%; \n height: auto;\n min-height: 280px; \n border-right: none;\n border-top: 8px solid #f3f4f6; \n border-bottom: 1px solid var(--py-border);\n }\n\n \/* Order 4: Execution Buttons (Run\/Reset) *\/\n .py-receipt-execution-group {\n order: 4;\n width: 100%;\n display: flex;\n padding: 15px;\n gap: 10px;\n border-bottom: 1px solid var(--py-border);\n background: #fff;\n }\n \/* Make Run\/Reset buttons full width for touch targets *\/\n .py-receipt-execution-group .py-receipt-btn { flex: 1; }\n \n \/* Order 5: Output Area *\/\n .py-receipt-output-wrapper {\n order: 5;\n width: 100%;\n height: auto;\n min-height: 300px;\n max-height: 500px;\n border-right: none;\n background: #fff;\n }\n\n \/* Order 6: Navigation (Next\/Prev) - Bottom of screen *\/\n \/* Show the mobile buttons *\/\n .py-receipt-btn-mobile {\n display: inline-flex !important;\n order: 6;\n width: 48%; \/* Sit side by side *\/\n margin: 15px 1%;\n box-sizing: border-box;\n text-align: center;\n }\n \n \/* Handle links that are hidden via JS logic *\/\n a.py-receipt-hidden { display: none !important; }\n }\n<\/style>\n\n<\/head>\n\n<body>\n\n<div class=\"py-receipt-wrapper\">\n <div class=\"py-receipt-top-nav\">\n <a id=\"py-receipt-btn-prev-top\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden\" href=\"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/create-a-dictionary-based-phonebook\">← Previous<\/a>\n <span class=\"py-receipt-nav-title\">Module 5: Dictionaries & Sets<\/span>\n <a id=\"py-receipt-btn-next-top\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden\" href=\"Exercise_6_1.html\">Next →<\/a>\n <\/div>\n\n <div class=\"py-receipt-ide-container\" id=\"py-receipt-ideContainer\">\n \n <div class=\"py-receipt-left-pane\">\n <div class=\"py-receipt-tabs-header\">\n <div class=\"py-receipt-tab-item active\" onclick=\"pyReceiptSwitchTab('statement')\">Statement<\/div>\n <div class=\"py-receipt-tab-item\" onclick=\"pyReceiptSwitchTab('solution')\">Solution<\/div>\n <\/div>\n\n <div id=\"py-receipt-tab-statement\" class=\"py-receipt-pane-content active\">\n <h1 id=\"python-exercise-5-3-common-students\">Python Exercise 5.3: Common Students<\/h1>\n <p>Find intersection and symmetric difference between two sets of names.<\/p>\n <p>Your program should:<\/p>\n <ul>\n <li>Take two sets of student names (one for math class, one for science class).<\/li>\n <li>Find students who are in both classes (intersection).<\/li>\n <li>Find students who are in exactly one class (symmetric difference).<\/li>\n <li>Print the results clearly.<\/li>\n <\/ul>\n\n <h3 id=\"sample-interaction\">Sample Interaction:<\/h3>\n <div class=\"py-receipt-sample-box\">\n <div class=\"py-receipt-sample-header\">\n <div class=\"py-receipt-sample-col-title\">Input<\/div>\n <div class=\"py-receipt-sample-col-title\">Output<\/div>\n <\/div>\n <div class=\"py-receipt-sample-body\">\n <div class=\"py-receipt-sample-col-content\">Alice,Bob,Charlie\nBob,Charlie,David<\/div>\n <div class=\"py-receipt-sample-col-content\">Students in both classes: {'Bob', 'Charlie'}\nStudents in exactly one class: {'Alice', 'David'}<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div id=\"py-receipt-tab-solution\" class=\"py-receipt-pane-content\">\n <h1 id=\"solution\">Solution<\/h1>\n <p>Here is one way to find common and unique students using sets.<\/p>\n <div class=\"py-receipt-solution-block\"># Get input as comma-separated strings\nmath_students = input(\"Enter math students (comma-separated): \").split(',')\nscience_students = input(\"Enter science students (comma-separated): \").split(',')\n\n# Convert to sets and strip whitespace\nmath_set = {name.strip() for name in math_students}\nscience_set = {name.strip() for name in science_students}\n\n# Find intersection (students in both)\nboth = math_set & science_set\n\n# Find symmetric difference (students in exactly one)\none_only = math_set ^ science_set\n\n# Print results\nprint(f\"Students in both classes: {both}\")\nprint(f\"Students in exactly one class: {one_only}\")<\/div>\n \n <p style=\"margin-top:20px\"><strong>Key Concepts:<\/strong><\/p>\n <ul>\n <li><code>set<\/code> automatically removes duplicates and allows set operations.<\/li>\n <li><code>&<\/code> operator finds intersection (common elements).<\/li>\n <li><code>^<\/code> operator finds symmetric difference (elements in one but not both).<\/li>\n <li>Set comprehensions can be used to process input lists.<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-right-pane\">\n <div class=\"py-receipt-editor-top-bar\">\n <span class=\"py-receipt-lang-label\">Python 3<\/span>\n <div class=\"py-receipt-editor-settings\">\n <i class=\"fas fa-expand\" id=\"py-receipt-fullscreenBtn\" title=\"Toggle Fullscreen\"><\/i>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-code-area\">\n <div id=\"py-receipt-code-editor-div\"><\/div>\n <\/div>\n\n <div class=\"py-receipt-console-section\">\n <div class=\"py-receipt-console-header\">Test Console<\/div>\n <div class=\"py-receipt-console-body\">\n <div class=\"py-receipt-input-wrapper\">\n <label class=\"py-receipt-console-label\">Custom Input (Stdin)<\/label>\n <textarea id=\"py-receipt-custom-input\" class=\"py-receipt-custom-input-area\" placeholder=\"Enter input here...\">Alice,Bob,Charlie\nBob,Charlie,David<\/textarea>\n <\/div>\n <div class=\"py-receipt-output-wrapper\">\n <label class=\"py-receipt-console-label\">Output<\/label>\n <div id=\"py-receipt-output-console\" class=\"py-receipt-output-display\">Run code to see output...<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-footer-actions\">\n <a id=\"py-receipt-btn-prev-mobile\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden py-receipt-btn-mobile\" href=\"\">← Previous<\/a>\n\n <div class=\"py-receipt-execution-group\">\n <button class=\"py-receipt-btn py-receipt-btn-secondary\" onclick=\"pyReceiptResetCode()\">Reset<\/button>\n \n <button class=\"py-receipt-btn py-receipt-btn-primary\" onclick=\"pyReceiptRunCode()\">\n <span id=\"py-receipt-btn-text\">Run Code<\/span>\n <span class=\"py-receipt-spinner\" id=\"py-receipt-btn-spinner\"><\/span>\n <\/button>\n <\/div>\n\n <a id=\"py-receipt-btn-next-mobile\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden py-receipt-btn-mobile\" href=\"Exercise_6_1.html\">Next →<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/codemirror.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/mode\/python\/python.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/addon\/edit\/closebrackets.min.js\"><\/script>\n\n<script>\n \/\/ Global variable for this specific exercise to allow inline HTML clicks\n var pyReceiptEditor; \n var pyReceiptStarterCode;\n\n \/\/ --- 1. CONFIGURATION: EXERCISE LINKS ---\n const pyReceiptPrevLink = \"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/create-a-dictionary-based-phonebook\"; \n const pyReceiptNextLink = \"\"; \n\n \/\/ --- 2. Button Visibility Logic (Updates both Desktop and Mobile buttons) ---\n document.addEventListener(\"DOMContentLoaded\", function() {\n \/\/ Desktop Top Buttons\n const prevBtnTop = document.getElementById('py-receipt-btn-prev-top');\n const nextBtnTop = document.getElementById('py-receipt-btn-next-top');\n \n \/\/ Mobile Bottom Buttons\n const prevBtnMobile = document.getElementById('py-receipt-btn-prev-mobile');\n const nextBtnMobile = document.getElementById('py-receipt-btn-next-mobile');\n\n if (pyReceiptPrevLink && pyReceiptPrevLink.trim() !== \"\") {\n \/\/ Enable Desktop\n prevBtnTop.href = pyReceiptPrevLink;\n prevBtnTop.classList.remove('py-receipt-hidden');\n \/\/ Enable Mobile\n prevBtnMobile.href = pyReceiptPrevLink;\n prevBtnMobile.classList.remove('py-receipt-hidden');\n }\n\n if (pyReceiptNextLink && pyReceiptNextLink.trim() !== \"\") {\n \/\/ Enable Desktop\n nextBtnTop.href = pyReceiptNextLink;\n nextBtnTop.classList.remove('py-receipt-hidden');\n \/\/ Enable Mobile\n nextBtnMobile.href = pyReceiptNextLink;\n nextBtnMobile.classList.remove('py-receipt-hidden');\n }\n });\n\n \/\/ --- 3. IDE Logic ---\n function pyReceiptSwitchTab(tabName) {\n document.querySelectorAll('.py-receipt-pane-content').forEach(el => el.classList.remove('active'));\n document.querySelectorAll('.py-receipt-tab-item').forEach(el => el.classList.remove('active'));\n document.getElementById('py-receipt-tab-' + tabName).classList.add('active');\n \n const tabs = document.querySelectorAll('.py-receipt-tab-item');\n if(tabName === 'statement') tabs[0].classList.add('active');\n if(tabName === 'solution') tabs[1].classList.add('active');\n }\n\n const pyReceiptFullscreenBtn = document.getElementById('py-receipt-fullscreenBtn');\n const pyReceiptIdeContainer = document.getElementById('py-receipt-ideContainer');\n\n if(pyReceiptFullscreenBtn) {\n pyReceiptFullscreenBtn.addEventListener('click', () => {\n if (!document.fullscreenElement) {\n pyReceiptIdeContainer.requestFullscreen().catch(err => alert(`Error: ${err.message}`));\n pyReceiptFullscreenBtn.classList.replace('fa-expand', 'fa-compress');\n } else {\n document.exitFullscreen();\n pyReceiptFullscreenBtn.classList.replace('fa-compress', 'fa-expand');\n }\n });\n }\n\n \/\/ --- STARTER CODE ---\n pyReceiptStarterCode = `# Exercise 5.3: Common Students\n# Find intersection and symmetric difference of two sets\n\n# 1. Get two sets of student names\n\n# 2. Find students in both classes (intersection)\n\n# 3. Find students in exactly one class (symmetric difference)\n\n# 4. Print the results\n`;\n\n \/\/ Initialize CodeMirror on the prefixed ID\n pyReceiptEditor = CodeMirror(document.getElementById(\"py-receipt-code-editor-div\"), {\n value: pyReceiptStarterCode,\n mode: \"python\",\n theme: \"eclipse\",\n lineNumbers: true,\n indentUnit: 4,\n autoCloseBrackets: true\n });\n\n \/\/ --- 4. 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Your program should: Take two sets of student names (one for math class, one for science class). Find students who are in both classes (intersection). 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font-size: 14px;\n color: #333; white-space: pre-wrap; overflow-x: auto;\n }\n \n .py-receipt-sample-box { background-color: #f3f4f6; border: 1px solid var(--py-border); border-radius: 6px; margin-top: 20px; overflow: hidden; }\n .py-receipt-sample-header { display: flex; background-color: #e5e7eb; font-size: 13px; font-weight: 600; color: var(--py-text-primary); }\n .py-receipt-sample-col-title { width: 50%; padding: 8px 15px; border-right: 1px solid #d1d5db; }\n .py-receipt-sample-col-content { width: 50%; padding: 15px; font-family: 'Consolas', monospace; font-size: 14px; border-right: 1px solid var(--py-border); white-space: pre-wrap; color: #333; }\n .py-receipt-sample-body { display: flex; }\n\n \/* --- RIGHT PANE --- *\/\n .py-receipt-right-pane {\n width: 55%; display: flex; flex-direction: column; background: var(--py-bg-panel);\n }\n\n .py-receipt-editor-top-bar {\n height: var(--py-header-height); border-bottom: 1px solid var(--py-border);\n display: flex; align-items: center; justify-content: space-between;\n padding: 0 15px; background-color: #f9fafb;\n }\n\n .py-receipt-lang-label { font-weight: 600; font-size: 14px; background: #e5e7eb; padding: 4px 12px; border-radius: 4px; }\n .py-receipt-editor-settings i { color: var(--py-text-secondary); margin-left: 15px; cursor: pointer; font-size: 16px; }\n\n .py-receipt-code-area { flex: 1; display: flex; flex-direction: column; position: relative; }\n \/* Force CodeMirror to fit flex container *\/\n .py-receipt-code-area .CodeMirror { flex: 1; height: 100%; position: absolute; top: 0; bottom: 0; left: 0; right: 0; font-family: 'Source Code Pro', monospace; font-size: 15px; }\n\n .py-receipt-console-section {\n border-top: 1px solid var(--py-border); background: #f9fafb;\n display: flex; flex-direction: column; height: 35%;\n }\n .py-receipt-console-header { padding: 8px 15px; background: #e5e7eb; font-size: 12px; font-weight: 600; color: var(--py-text-secondary); text-transform: uppercase; }\n .py-receipt-console-body { display: flex; flex: 1; overflow: hidden; }\n .py-receipt-input-wrapper, .py-receipt-output-wrapper { flex: 1; display: flex; flex-direction: column; padding: 10px; border-right: 1px solid var(--py-border); }\n .py-receipt-output-wrapper { border-right: none; }\n .py-receipt-console-label { font-size: 12px; font-weight: 600; margin-bottom: 5px; color: var(--py-text-secondary); }\n \n textarea.py-receipt-custom-input-area { flex: 1; border: 1px solid var(--py-border); border-radius: 4px; resize: none; padding: 8px; font-family: monospace; width: 100%; }\n .py-receipt-output-display { flex: 1; background: white; border: 1px solid var(--py-border); border-radius: 4px; padding: 8px; font-family: monospace; white-space: pre-wrap; overflow-y: auto; font-size: 13px; }\n\n \/* --- FOOTER ACTIONS (Desktop) --- *\/\n .py-receipt-footer-actions {\n height: var(--py-footer-height);\n border-top: 1px solid var(--py-border);\n display: flex;\n align-items: center;\n \/* Aligns Reset\/Run to the left naturally if siblings are hidden *\/\n justify-content: flex-end; \n padding: 0 20px;\n background-color: var(--py-bg-panel);\n }\n\n .py-receipt-execution-group { display: flex; gap: 12px; align-items: center; }\n\n .py-receipt-btn {\n padding: 8px 20px;\n border-radius: 4px;\n font-size: 14px;\n font-weight: 600;\n cursor: pointer;\n text-decoration: none;\n display: inline-flex;\n align-items: center;\n justify-content: center;\n transition: 0.2s;\n height: 38px;\n box-shadow: none;\n border: none;\n }\n\n .py-receipt-btn-secondary { background: transparent; border: 1px solid var(--py-border); color: var(--py-text-primary); }\n .py-receipt-btn-secondary:hover { background: #f3f4f6; }\n\n .py-receipt-btn-primary { background: var(--py-primary-blue); border: 1px solid var(--py-primary-blue); color: white; }\n .py-receipt-btn-primary:hover { background: var(--py-primary-hover); }\n\n .py-receipt-spinner {\n display: none; width: 14px; height: 14px;\n border: 2px solid #fff; border-top-color: transparent;\n border-radius: 50%; animation: py-receipt-spin 0.8s linear infinite; margin-left: 8px;\n }\n @keyframes py-receipt-spin { 100% { transform: rotate(360deg); } }\n\n .py-receipt-hidden { display: none !important; }\n\n \/* Hide Mobile Buttons on Desktop *\/\n .py-receipt-btn-mobile { display: none !important; }\n\n \/* --- MOBILE RESPONSIVE FIX --- *\/\n @media (max-width: 768px) {\n \/* Hide Top Nav on Mobile *\/\n .py-receipt-top-nav { display: none; }\n\n .py-receipt-ide-container { flex-direction: column; overflow-y: auto; height: auto; }\n .py-receipt-left-pane, .py-receipt-right-pane { width: 100%; height: auto; }\n \n \/* 1. Left Pane *\/\n .py-receipt-left-pane { \n border-right: none; \n border-bottom: 8px solid #f3f4f6; \n min-height: auto;\n max-height: 400px;\n }\n \n \/* 2. Right Pane: Flex Column for ordering *\/\n .py-receipt-right-pane { display: flex; flex-direction: column; }\n \n \/* 3. Unwrap Console\/Footer to shuffle children *\/\n .py-receipt-console-section, \n .py-receipt-console-body,\n .py-receipt-footer-actions { \n display: contents; \n }\n \n .py-receipt-console-header { display: none; }\n\n \/* --- ORDERING LOGIC --- *\/\n\n \/* Order 1: Top Bar *\/\n .py-receipt-editor-top-bar { order: 1; }\n \n \/* Order 2: Code Editor *\/\n .py-receipt-code-area { \n order: 2; \n height: 500px; \n } \n .py-receipt-code-area .CodeMirror { position: relative; height: 500px; }\n\n \/* Order 3: Input Area (Top of bottom section) *\/\n .py-receipt-input-wrapper { \n order: 3;\n width: 100%; \n height: auto;\n min-height: 280px; \n border-right: none;\n border-top: 8px solid #f3f4f6; \n border-bottom: 1px solid var(--py-border);\n }\n\n \/* Order 4: Execution Buttons (Run\/Reset) *\/\n .py-receipt-execution-group {\n order: 4;\n width: 100%;\n display: flex;\n padding: 15px;\n gap: 10px;\n border-bottom: 1px solid var(--py-border);\n background: #fff;\n }\n \/* Make Run\/Reset buttons full width for touch targets *\/\n .py-receipt-execution-group .py-receipt-btn { flex: 1; }\n \n \/* Order 5: Output Area *\/\n .py-receipt-output-wrapper {\n order: 5;\n width: 100%;\n height: auto;\n min-height: 300px;\n max-height: 500px;\n border-right: none;\n background: #fff;\n }\n\n \/* Order 6: Navigation (Next\/Prev) - Bottom of screen *\/\n \/* Show the mobile buttons *\/\n .py-receipt-btn-mobile {\n display: inline-flex !important;\n order: 6;\n width: 48%; \/* Sit side by side *\/\n margin: 15px 1%;\n box-sizing: border-box;\n text-align: center;\n }\n \n \/* Handle links that are hidden via JS logic *\/\n a.py-receipt-hidden { display: none !important; }\n }\n<\/style>\n\n<\/head>\n\n<body>\n\n<div class=\"py-receipt-wrapper\">\n <div class=\"py-receipt-top-nav\">\n <a id=\"py-receipt-btn-prev-top\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden\" href=\"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/create-a-dictionary-based-phonebook\">← Previous<\/a>\n <span class=\"py-receipt-nav-title\">Module 5: Dictionaries & Sets<\/span>\n <a id=\"py-receipt-btn-next-top\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden\" href=\"Exercise_6_1.html\">Next →<\/a>\n <\/div>\n\n <div class=\"py-receipt-ide-container\" id=\"py-receipt-ideContainer\">\n \n <div class=\"py-receipt-left-pane\">\n <div class=\"py-receipt-tabs-header\">\n <div class=\"py-receipt-tab-item active\" onclick=\"pyReceiptSwitchTab('statement')\">Statement<\/div>\n <div class=\"py-receipt-tab-item\" onclick=\"pyReceiptSwitchTab('solution')\">Solution<\/div>\n <\/div>\n\n <div id=\"py-receipt-tab-statement\" class=\"py-receipt-pane-content active\">\n <h1 id=\"python-exercise-5-3-common-students\">Python Exercise 5.3: Common Students<\/h1>\n <p>Find intersection and symmetric difference between two sets of names.<\/p>\n <p>Your program should:<\/p>\n <ul>\n <li>Take two sets of student names (one for math class, one for science class).<\/li>\n <li>Find students who are in both classes (intersection).<\/li>\n <li>Find students who are in exactly one class (symmetric difference).<\/li>\n <li>Print the results clearly.<\/li>\n <\/ul>\n\n <h3 id=\"sample-interaction\">Sample Interaction:<\/h3>\n <div class=\"py-receipt-sample-box\">\n <div class=\"py-receipt-sample-header\">\n <div class=\"py-receipt-sample-col-title\">Input<\/div>\n <div class=\"py-receipt-sample-col-title\">Output<\/div>\n <\/div>\n <div class=\"py-receipt-sample-body\">\n <div class=\"py-receipt-sample-col-content\">Alice,Bob,Charlie\nBob,Charlie,David<\/div>\n <div class=\"py-receipt-sample-col-content\">Students in both classes: {'Bob', 'Charlie'}\nStudents in exactly one class: {'Alice', 'David'}<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div id=\"py-receipt-tab-solution\" class=\"py-receipt-pane-content\">\n <h1 id=\"solution\">Solution<\/h1>\n <p>Here is one way to find common and unique students using sets.<\/p>\n <div class=\"py-receipt-solution-block\"># Get input as comma-separated strings\nmath_students = input(\"Enter math students (comma-separated): \").split(',')\nscience_students = input(\"Enter science students (comma-separated): \").split(',')\n\n# Convert to sets and strip whitespace\nmath_set = {name.strip() for name in math_students}\nscience_set = {name.strip() for name in science_students}\n\n# Find intersection (students in both)\nboth = math_set & science_set\n\n# Find symmetric difference (students in exactly one)\none_only = math_set ^ science_set\n\n# Print results\nprint(f\"Students in both classes: {both}\")\nprint(f\"Students in exactly one class: {one_only}\")<\/div>\n \n <p style=\"margin-top:20px\"><strong>Key Concepts:<\/strong><\/p>\n <ul>\n <li><code>set<\/code> automatically removes duplicates and allows set operations.<\/li>\n <li><code>&<\/code> operator finds intersection (common elements).<\/li>\n <li><code>^<\/code> operator finds symmetric difference (elements in one but not both).<\/li>\n <li>Set comprehensions can be used to process input lists.<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-right-pane\">\n <div class=\"py-receipt-editor-top-bar\">\n <span class=\"py-receipt-lang-label\">Python 3<\/span>\n <div class=\"py-receipt-editor-settings\">\n <i class=\"fas fa-expand\" id=\"py-receipt-fullscreenBtn\" title=\"Toggle Fullscreen\"><\/i>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-code-area\">\n <div id=\"py-receipt-code-editor-div\"><\/div>\n <\/div>\n\n <div class=\"py-receipt-console-section\">\n <div class=\"py-receipt-console-header\">Test Console<\/div>\n <div class=\"py-receipt-console-body\">\n <div class=\"py-receipt-input-wrapper\">\n <label class=\"py-receipt-console-label\">Custom Input (Stdin)<\/label>\n <textarea id=\"py-receipt-custom-input\" class=\"py-receipt-custom-input-area\" placeholder=\"Enter input here...\">Alice,Bob,Charlie\nBob,Charlie,David<\/textarea>\n <\/div>\n <div class=\"py-receipt-output-wrapper\">\n <label class=\"py-receipt-console-label\">Output<\/label>\n <div id=\"py-receipt-output-console\" class=\"py-receipt-output-display\">Run code to see output...<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"py-receipt-footer-actions\">\n <a id=\"py-receipt-btn-prev-mobile\" class=\"py-receipt-btn py-receipt-btn-secondary py-receipt-hidden py-receipt-btn-mobile\" href=\"\">← Previous<\/a>\n\n <div class=\"py-receipt-execution-group\">\n <button class=\"py-receipt-btn py-receipt-btn-secondary\" onclick=\"pyReceiptResetCode()\">Reset<\/button>\n \n <button class=\"py-receipt-btn py-receipt-btn-primary\" onclick=\"pyReceiptRunCode()\">\n <span id=\"py-receipt-btn-text\">Run Code<\/span>\n <span class=\"py-receipt-spinner\" id=\"py-receipt-btn-spinner\"><\/span>\n <\/button>\n <\/div>\n\n <a id=\"py-receipt-btn-next-mobile\" class=\"py-receipt-btn py-receipt-btn-primary py-receipt-hidden py-receipt-btn-mobile\" href=\"Exercise_6_1.html\">Next →<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/codemirror.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/mode\/python\/python.min.js\"><\/script>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/codemirror\/5.65.16\/addon\/edit\/closebrackets.min.js\"><\/script>\n\n<script>\n \/\/ Global variable for this specific exercise to allow inline HTML clicks\n var pyReceiptEditor; \n var pyReceiptStarterCode;\n\n \/\/ --- 1. CONFIGURATION: EXERCISE LINKS ---\n const pyReceiptPrevLink = \"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/create-a-dictionary-based-phonebook\"; \n const pyReceiptNextLink = \"\"; \n\n \/\/ --- 2. Button Visibility Logic (Updates both Desktop and Mobile buttons) ---\n document.addEventListener(\"DOMContentLoaded\", function() {\n \/\/ Desktop Top Buttons\n const prevBtnTop = document.getElementById('py-receipt-btn-prev-top');\n const nextBtnTop = document.getElementById('py-receipt-btn-next-top');\n \n \/\/ Mobile Bottom Buttons\n const prevBtnMobile = document.getElementById('py-receipt-btn-prev-mobile');\n const nextBtnMobile = document.getElementById('py-receipt-btn-next-mobile');\n\n if (pyReceiptPrevLink && pyReceiptPrevLink.trim() !== \"\") {\n \/\/ Enable Desktop\n prevBtnTop.href = pyReceiptPrevLink;\n prevBtnTop.classList.remove('py-receipt-hidden');\n \/\/ Enable Mobile\n prevBtnMobile.href = pyReceiptPrevLink;\n prevBtnMobile.classList.remove('py-receipt-hidden');\n }\n\n if (pyReceiptNextLink && pyReceiptNextLink.trim() !== \"\") {\n \/\/ Enable Desktop\n nextBtnTop.href = pyReceiptNextLink;\n nextBtnTop.classList.remove('py-receipt-hidden');\n \/\/ Enable Mobile\n nextBtnMobile.href = pyReceiptNextLink;\n nextBtnMobile.classList.remove('py-receipt-hidden');\n }\n });\n\n \/\/ --- 3. IDE Logic ---\n function pyReceiptSwitchTab(tabName) {\n document.querySelectorAll('.py-receipt-pane-content').forEach(el => el.classList.remove('active'));\n document.querySelectorAll('.py-receipt-tab-item').forEach(el => el.classList.remove('active'));\n document.getElementById('py-receipt-tab-' + tabName).classList.add('active');\n \n const tabs = document.querySelectorAll('.py-receipt-tab-item');\n if(tabName === 'statement') tabs[0].classList.add('active');\n if(tabName === 'solution') tabs[1].classList.add('active');\n }\n\n const pyReceiptFullscreenBtn = document.getElementById('py-receipt-fullscreenBtn');\n const pyReceiptIdeContainer = document.getElementById('py-receipt-ideContainer');\n\n if(pyReceiptFullscreenBtn) {\n pyReceiptFullscreenBtn.addEventListener('click', () => {\n if (!document.fullscreenElement) {\n pyReceiptIdeContainer.requestFullscreen().catch(err => alert(`Error: ${err.message}`));\n pyReceiptFullscreenBtn.classList.replace('fa-expand', 'fa-compress');\n } else {\n document.exitFullscreen();\n pyReceiptFullscreenBtn.classList.replace('fa-compress', 'fa-expand');\n }\n });\n }\n\n \/\/ --- STARTER CODE ---\n pyReceiptStarterCode = `# Exercise 5.3: Common Students\n# Find intersection and symmetric difference of two sets\n\n# 1. Get two sets of student names\n\n# 2. Find students in both classes (intersection)\n\n# 3. Find students in exactly one class (symmetric difference)\n\n# 4. Print the results\n`;\n\n \/\/ Initialize CodeMirror on the prefixed ID\n pyReceiptEditor = CodeMirror(document.getElementById(\"py-receipt-code-editor-div\"), {\n value: pyReceiptStarterCode,\n mode: \"python\",\n theme: \"eclipse\",\n lineNumbers: true,\n indentUnit: 4,\n autoCloseBrackets: true\n });\n\n \/\/ --- 4. 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Your program should: Take two sets of student names (one for math class, one for science class). Find students who are in both classes (intersection). Find students […]<\/p>\n","protected":false},"author":41,"featured_media":0,"parent":114145,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25860],"tags":[36796,36895],"class_list":["post-117568","page","type-page","status-publish","hentry","category-software","tag-python","tag-python-exercise"],"acf":[],"yoast_head":"\n<title>Python Program to Find Common Students - Great Learning Blog: Free Resources what Matters to shape your Career!<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mygreatlearning.com\/blog\/python-exercise\/python-program-to-find-common-students\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python Program to Find Common Students\" \/>\n<meta property=\"og:description\" content=\"Exercise 5.3 ← Previous Module 5: Dictionaries & Sets Next → Statement Solution Python Exercise 5.3: Common Students Find intersection and symmetric difference between two sets of names. Your program should: Take two sets of student names (one for math class, one for science class). Find students who are in both classes (intersection). 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