Problems on Files & Exception
🧩 Problem 1: Read and Display File Content
Description:
Write a Python program to open a text file named info.txt and display its contents on the screen.
If the file does not exist, display a custom message like “File not found.”
Concepts Covered:
- File reading using
open() - Handling
FileNotFoundError
Example:
File content:
Hello, Python learners!
Welcome to file handling.
🧩 Problem 2: Write User Input to a File
Description:
Ask the user to input a few lines of text and write them to a file called user_notes.txt.
Each input line should be written on a new line.
Concepts Covered:
- Writing files with
"w"mode - Taking user input and writing multiple lines
🧩 Problem 3: Append Data to a File
Description:
Write a program that appends a new line "New data added successfully." to an existing file log.txt.
If the file doesn’t exist, create it.
Concepts Covered:
- Using
"a"mode for appending - Creating file if it doesn’t exist
🧩 Problem 4: Count Number of Lines in a File
Description:
Write a Python script to count and display the total number of lines in data.txt.
Concepts Covered:
- Iterating over file lines
- Counting items using loops
Example:
If data.txt contains:
Line 1
Line 2
Line 3
Output: 3 lines
🧩 Problem 5: Copy Content from One File to Another
Description:
Create a program that copies all content from source.txt to destination.txt.
If source.txt doesn’t exist, handle the error properly.
Concepts Covered:
- Reading and writing files
- Using
try...exceptfor file handling
🧩 Problem 6: Count Words in a File
Description:
Write a program to count the number of words in story.txt.
Display the total word count to the user.
Concepts Covered:
- File reading
- String splitting and counting
Example:
File content: "Python makes file handling easy."
Output: 5 words
🧩 Problem 7: Read File Using with Statement
Description:
Open a file example.txt using the with statement and display its contents line by line.
Demonstrate how Python automatically closes the file afterward.
Concepts Covered:
with open()context manager- Automatic file closing
🧩 Problem 8: Handle Division Error from File Input
Description:
You have a file numbers.txt containing two numbers (one per line).
Read the numbers and divide the first by the second.
If the second number is zero, display “Cannot divide by zero.”
Concepts Covered:
- Reading numbers from a file
- Handling
ZeroDivisionError