11.10 Closing a Text file and Opening file using 'with' Clause

Duration: 6 min

This video lesson is available to enrolled students.

Return to /learn/MPPSC-ASSISTANT-PROFESSOR-COMPUTER-SCIENCE-PAPER-2/python/file-handling-data-analysis/text-files/asset-1110-closing-a-text-file-and-opening-file-using-with-clause after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Paper 1 | General Studies: State Wise GK
  3. Paper 1 | Information and Communication Technology: Role of Internet and Web Services, Security in Mobile and Wireless Computing
  4. Paper 1 | Current Affairs: GK- Current Affairs
  5. Paper 2 | Discrete Mathematical Structure: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Probability
  6. Paper 2 | Digital Computer Organization And Architecture: Number System, Number Representation, Sequential Circuits, Combinational Circuit, Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer
  7. Paper 2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  8. Paper 2 | Programming Languages & Object-Oriented Programming Concepts: Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  9. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  10. Paper 2 | Data Structure And Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Advanced Algorithms
  11. Paper 2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS
  12. Paper 2 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  13. Paper 2 | Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  14. Paper 2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, Enhanced Data Models
  15. Paper 2 | Computer Network And Information Security: Introduction to CN, Data Communication, Application Layer, Hardware basics, Cyber Threats and Malware Attacks, Network Security, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP
  16. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  17. Paper 2 | Current Trends & Technologies: Emerging Tech Trends, Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Fuzzy Sets, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms, Artificial Intelligence, Data Warehousing & Mining, Electronic Data Interchange and E-Commerce, Terms & Abbreviations
  18. Paper 2 | Full Length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a Python programming tutorial that teaches file handling concepts. The instructor begins by explaining the importance of closing a file, listing reasons such as saving data, releasing memory, and preventing data corruption, and shows the `f.close()` method. The lesson then transitions to the `with` clause, which is presented as a safer and more convenient alternative that automatically handles file closing. The instructor demonstrates the syntax `with open('data.txt', 'r') as f:` and explains its advantages. Finally, the video covers writing data to a file using the `write()` and `writelines()` methods, showing code examples for writing a single string and a list of strings to a text file.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title slide for a Python lesson on 'Closing a Text File and Opening File Using with Clause'. The instructor, standing in front of a digital screen, introduces the topic. The screen then changes to a slide titled 'Why Close a File?', which lists the reasons: 'Saves data', 'Releases memory', and 'Prevents data corruption'. The instructor explains these points, and the code snippet `f.close()` is visible on the screen, demonstrating the manual method of closing a file.

  2. 2:00 – 5:00 02:00-05:00

    The instructor transitions to the 'with' clause as a better way to handle files. The slide changes to 'Opening File Using with Clause', and the advantages are listed: 'No need to close file manually', 'No need to clean', and 'Safe and clean'. The instructor explains that the `with` statement ensures the file is automatically closed, even if an error occurs. He then demonstrates the syntax by writing `with open('data.txt', 'r') as f:` on the screen, followed by `print(f.read())`, illustrating a clean and safe way to read a file.

  3. 5:00 – 5:42 05:00-05:42

    The final segment covers writing data to a file. The slide is titled 'Writing Data to a Text File Using write()'. The instructor shows a code example: `f = open('info.txt', 'w')`, followed by `f.write('Name: Amit ')` and `f.write('Age: 20')`, and concludes with `f.close()`. He then introduces the `writelines()` method with a new slide titled 'Writing Multiple Lines', showing a list `lines = ['Apple\n', 'Banana\n', 'Mango\n']` and the code `f.writelines(lines)` to write multiple lines at once.

The video provides a structured progression on Python file handling. It starts with the fundamental concept of manually closing files and the risks of not doing so. It then introduces the `with` clause as a superior, more reliable method that automates the closing process, emphasizing safety and code cleanliness. The lesson concludes by demonstrating the practical application of writing data to a file using both the `write()` and `writelines()` methods, covering both single and multiple line inputs. The overall teaching style is clear and methodical, using on-screen code and bullet points to reinforce key concepts.

Loading lesson…