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Introduction to Python Programming

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File I/O
Description

This lesson outline focuses on explaining the concepts and importance of file I/O without delving into coding syntax. It provides a foundation for students to understand the fundamentals before diving into the actual coding aspects in subsequent lessons.

Objective

Students will be able to:

  • Define and explain file I/O.
  • Differentiate file types (e.g., text, binary).
  • Identify input sources and output destinations in computing.
  • Understand the purpose and significance of file input.
  • Understand the purpose and significance of file output.
  • Discuss real-world applications of file I/O.
Description

In this lesson, students learn how to read all or a given number of characters from a file using Python.

Objective

Students will be able to

  • Understand the importance of reading files and the role it plays in file handling tasks.
  • Use the open() function to open a file in read mode and the close() method to close the file properly.
  • Read the entire contents of a file using the read() method and store them in a variable
  • Handle common file exceptions, such as FileNotFoundError, when attempting to read a file.
Description

In this lesson, students learn how to use the readline() method to read lines from a file.

Objective

Students will be able to:

  • Understand the purpose and usage of the readline() method in Python for reading lines from a file.
  • Demonstrate how to open a file and use readline() to read a single line at a time.
  • Implement a loop to read and process multiple lines from a file using readline().
  • Handle end-of-file (EOF) situations by checking for an empty string returned by readline().
  • Adapt the readline() method to solve practical problems and perform operations on each line read from a file.
Description

In this lesson, students learn how to use the readlines() method in Python to read multiple lines from a file, and practice performing various operations and manipulations on the line

Objective

Students will be able to:

  • Understand the purpose and usage of the readlines() method in Python.
  • Read and retrieve multiple lines from a file using readlines().
  • Iterate through the lines obtained from readlines() and perform operations on each line.
  • Apply different manipulations and processing techniques to the lines read from a file.
  • Recognize the advantages and use cases of using readlines() in file handling scenarios.
Description

In this lesson, students learn how to write to existing files. They will explore two modes: “w” for overwriting a file and “a” for appending to a file.

Objective

Students will be able to:

  • Understand the purpose and importance of writing to files in programming.
  • Use the “w” mode to overwrite the contents of a file.
  • Use the “a” mode to append new data to the end of a file.
  • Demonstrate the ability to write text and data to a file using appropriate file handling techniques.
Description

In this lesson, students learn how to manipulate the file pointer position using the seek() method in Python. They will explore how seek() can be used to move the pointer to a specific location within a file, enabling reading and writing operations at desired positions.

Objective

Students will be able to:

  • Understand the concept of a file pointer and its role in reading and writing data.
  • Use the seek() method to move the file pointer to a specific position within a file.
  • Perform reading operations at a desired file pointer position.
  • Perform writing operations at a specific location within a file.
  • Identify and handle potential errors or exceptions related to seek() operations.

1.7 File I/O Quiz