Page 302 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

TASK 1: Program code for read mode
It is a read operation in Python. We open an existing file with the given code and then read it. The code
is given below –
# Open the file in read mode
with open(“file.txt”, “r”) as fileptr:
# Read the contents of the file
file_content = fileptr.read()

# Print the content
print(file_content)
Explanation:
with open(“file.txt”, “r”) as fileptr:

• with: The with statement is used to wrap the execution of a block with methods defined by a context manager.
It ensures that the file is properly closed after the block execution, even if an exception occurs.
• open(“file.txt”, “r”): The open function is used to open a file. The first argument is the filename (“file.txt” in this
case), and the second argument is the mode (“r” for read mode).
• as fileptr: It assigns the file object returned by open to the variable fileptr. This variable is used to interact with
the file.

file_content = fileptr.read():
• fileptr.read(): The read method is called on the file object (fileptr). It reads the entire content of the file and
returns it as a string, which is then assigned to the variable file_content.
print(file_content):

• print(file_content): This line prints the contents of the file, which were stored in the file_content variable.
• The use of the with statement is good practice because it automatically takes care of closing the file when the
indented block is exited, ensuring proper resource management.

Output:

TASK 2: Open the file in write mode
# Open the file in write mode
with open(“file.txt”, “w”) as fileptr:
# Write content to the file
fileptr.write(“Hello, this is a sample line.\n”)

fileptr.write(“Writing another line to the file.\n”)
print(“Content has been written to the file.”)
Explanation:
1 with open(“file.txt”, “w”) as fileptr::
• This line opens the file named “file.txt” in write mode (“w”).

• The with statement ensures that the file is properly closed after writing.

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