Page 304 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

with open(“sample_file.txt”, “r”) as fileptr:
# Step 8: Read and print the updated file content
updated_content = fileptr.read()
print(“\nUpdated File Content (Read Mode):\n”, updated_content)

Explanation:
1 Opening File for Writing (“w”):
• with open(“sample_file.txt”, “w”) as fileptr: opens the file “sample_file.txt” in write mode.
• write method is used to write content to the file.
2 Reading File Content (“r”):

• with open(“sample_file.txt”, “r”) as fileptr: opens the file in read mode to read its content.
• read method is used to read and print the file content.
3 Appending to the File (“a”):
• with open(“sample_file.txt”, “a”) as fileptr: opens the file in append mode.
• write method is used to append content to the file.

4 Reading Updated File Content (“r”):
• with open(“sample_file.txt”, “r”) as fileptr: opens the file again in read mode.
• read method is used to read and print the updated file content.
After running this code, you should see the content of “sample_file.txt” displayed, including the appended line.

Output:

Related Exercises:
1 File Reading:
• Write a Python program to read the contents of a file and display them.
• Modify the program to read only the first N lines of the file.

2 File Writing:
• Create a Python program to write a list of strings to a file.
• Allow the user to input multiple lines of text and save them to a file.
3 Appending to a File:

• Write a program to append new data to an existing file.
• Allow the user to input additional lines and append them to the file.

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CITS : IT & ITES - Computer Software Application - Exercise 133