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Revision Notes

File Handling in Python

Haryana Board · Class 12 · Computer Science

Quick revision notes for File Handling in Python — Haryana Board Class 12 Computer Science. Key concepts, formulas, and definitions for last-minute revision.

44 questions96 flashcards5 concepts

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Illustrates why file handling is necessary, showing the difference between temporary data in RAM (variables) and permanent data storage on secondary devices (files).
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Key Topics to Revise

1

1. Basics of Files and Types of Files

  • Files are used to store data permanently instead of only keeping it in memory during program execution.
  • There are mainly two types of data files: text file and binary file.
  • Text files contain only the ASCII equivalent of the contents and are human readable.
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2. Opening and Closing Files

  • open() creates a new empty file if the file does not exist.
  • The default access mode for open() is read mode.
  • By default, files are opened in text mode; binary mode requires b.
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3. File Access Modes

  • r means read only and the file object starts at the beginning of the file.
  • rb means binary read only and the file object starts at the beginning of the file.
  • r+ or +r means read and write and the file object starts at the beginning of the file.
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4. Writing to Text Files

  • To write to a file, it must be opened in write or append mode.
  • write() is for writing a single string.
  • writelines() is for writing a sequence of strings.

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Full Notes

Key Concepts

A file is a named locationA text file contains only textualA binary file stores actual contentopen() creates a file objectclose() closes the file using file_object

Frequently Asked Questions

What are the important topics in File Handling in Python for Haryana Board Class 12 Computer Science?
File Handling in Python covers several key topics that are frequently asked in Haryana Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in File Handling in Python — Haryana Board Class 12 Computer Science?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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