11.16 Appending, Searching data to a Binary File

Duration: 5 min

This video lesson is available to enrolled students.

Return to /learn/BPSC/part-3-python/file-handling-data-analysis/binary-files/asset-1116-appending-searching-data-to-a-binary-file after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Section 1 | Language (Hindi): भाषा, लिपि, ध्वनि, वर्ण, अक्षर, स्वर, व्यंजन, मात्रा और संयुक्ताक्षर, वर्तनी, वर्ण-विन्यास, अनुस्वार, अनुनासिक, चंद्रबिंदु और ‘र’ के रूप, शब्द, पद और शब्द-भेद, संज्ञा और सर्वनाम, विशेषण और क्रिया, लिंग, वचन, पुरुष और कारक, काल, वाच्य, वाक्य और वाक्य-भेद, संधि, समास, विलोम शब्द, पर्यायवाची शब्द, सामान्य अशुद्धियाँ, अनेक शब्दों के लिए एक शब्द, मुहावरे और लोकोक्तियाँ, अपठित गद्यांश और अपठित पद्यांश, Multi-Topic Content (Cross-Concept Material), वर्णमाला
  3. Section 1 | Language (उर्दू भाषा — 22 प्रश्न (निश्चित)): Spelling & Diacritics, Grammar (اسم, فعل, صفت, ضمیر), Vocabulary, Idioms & Proverbs, Comprehension
  4. Section 1 | Language (বাংলা / बांग्ला भाषा — 22 प्रश्न (निश्चित)): Bangla Script and Sounds, Bangla Grammar and Usage, Bangla Word Formation and Vocabulary, Reading and Text Interpretation
  5. Section 1 | Language (English): Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Pronoun, Verb, Adverb, Preposition, Articles, Determiner, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Construction, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Verbal Analogy (Word Based Analogy), Facts, Inference and Judgements
  6. Section 2 | Primary Maths & Reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Mensuration and Geometry, Age Problems, Arithmetic, Powers and Exponents (Surds and Indices), Algebra, Probability, Trigonometry, Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence
  7. Section 2 | General Awareness (GK + Current Affairs): Polity, Physics, Biology, State Wise GK, Chemistry, History, Geography, Indian Economy, Environment, GK- Current Affairs, Static General Knowledge
  8. Section 3 | Computer System and Org. (CSO): Basics of COA, Floating Point Rep, Cache Memory Organization, Instr Formats & Modes, Programming the Basic Computer, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design
  9. Section 3 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control
  10. Section 3 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Process Synchronization
  11. Section 3 | Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics
  12. Section 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Shortest Path Algos
  13. Section 3 | Theory Of Computation & Compiler Design: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization
  14. Section 3 | Emerging Trends (AI, Societal Ethics & MS Office): Artificial Intelligence, Emerging Tech Trends, Society, Law & Ethics, MS Office Applications
  15. Section 3 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Maintenance and Configuration Management, Software Testing
  16. Section 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Section 3 | OOPS, C++, JAVA, HTML: OOPS with C++, Java, HTML Basics, CSS
  18. Section 3 | Java: Java Fundamentals, Array, String, IO & References
  19. Section 3 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  20. Section 3 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  21. Section 3 | Multimedia: Multimedia
  22. BPSC Previous Year Papers:
  23. BPSC Full Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a Python programming tutorial focused on file handling using the pickle module for serializing and deserializing Python objects. The instructor demonstrates how to append multiple records to a binary file, read all records from it, and search for a specific record by roll number. The lesson begins with a title slide on 'Appending, Searching Data to a Binary File' and proceeds to show code examples for each operation. The first example, titled 'Append Multiple Records (ab)', shows how to open a file in append-binary mode ('ab') and use pickle.dump() to write a dictionary object representing a student. The second example, 'Read All Records', demonstrates opening a file in read-binary mode ('rb') and using a loop with pickle.load() to retrieve and print each record until an EOFError is raised. The final example, 'Search Student by Roll Number', shows how to open a file, iterate through records, and check if a record's roll number matches a search value, printing a success message if found. The instructor uses a digital whiteboard to write code and draw diagrams, such as a box representing the file and arrows indicating data flow, to visually explain the concepts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title slide for a Python lecture on 'Appending, Searching Data to a Binary File'. The instructor, a man in a black polo shirt, stands in front of a digital screen. The screen displays a code example titled 'Append Multiple Records (ab)'. The code shows the import of the 'pickle' module, opening a file named 'student.dat' in append-binary mode ('ab'), creating a dictionary 'student2' with roll, name, and marks, and using 'pickle.dump(student2, f)' to write the data to the file. The instructor explains the process, emphasizing the 'ab' mode for appending data to a binary file. He uses a digital pen to highlight the 'import pickle' line and the 'f = open("student.dat","ab")' line, explaining that this mode allows new data to be added to the end of the file without overwriting existing content.

  2. 2:00 – 5:00 02:00-05:00

    The instructor transitions to the next topic, 'Read All Records'. The screen now shows a new code snippet. The code imports the 'pickle' module, opens 'student.dat' in read-binary mode ('rb'), and uses a try-except block to handle EOFError. A while loop with 'while True:' continuously calls 'pickle.load(f)' to read records from the file and prints them. The instructor explains that this loop will run until the end of the file is reached, at which point an EOFError is raised, and the except block handles it by breaking the loop. He then moves to the final topic, 'Search Student by Roll Number'. The code shows a variable 'roll_search = 2' and a loop that reads each record, checks if the 'roll' key matches the search value, and prints a success message if found. The instructor draws a diagram of a file with a box and an arrow, illustrating the process of reading data from the file.

  3. 5:00 – 5:14 05:00-05:14

    The instructor concludes the lesson. The screen displays the final code for searching a student by roll number, with a 'Record Found: {roll: 2, name: Neha, marks: 90}' message visible at the bottom. The instructor summarizes the key points of the lesson, emphasizing the use of the pickle module for binary file operations. He then says 'Thank you' and the video ends with a black screen and the text 'Thank you' displayed in the center.

The video provides a comprehensive, step-by-step tutorial on using Python's pickle module for persistent data storage. It systematically covers three core operations: appending data to a binary file, reading all data from it, and searching for specific records. The instructor effectively uses a digital whiteboard to present code and draw diagrams, making the concepts of file modes ('ab', 'rb'), the pickle functions (dump, load), and the loop logic for reading until EOF clear. The progression from simple data writing to complex data retrieval and search demonstrates a practical application of file handling in Python, making it a valuable resource for students learning data persistence.

Loading lesson…