Exploring File Handling in Python

What is the purpose of the 'open' function in Python?

• To close a file after reading or writing.

• To open a file and return a file object for reading or writing.

• To create a new file in the current directory.

• To delete a file from the system.

How do you read a text file line by line in Python?

• Use 'open("filename.txt") as file: read(file)'

• Use 'with open("filename.txt") as file: for line in file: print(line)'.

• Use 'file.read_lines("filename.txt")'

• Use 'open("filename.txt") and file.readlines()'

What method would you use to write data to a text file?

• Use file handling methods such as 'write()' or 'writelines()' after opening the file in write mode.

• Use the 'append()' method to add data to the file.

• Write data directly to the console instead of a file.

• Use 'read()' method to write data to a file.

Explain the difference between 'read()' and 'readlines()' methods.

• The 'read()' method returns a single string, whereas 'readlines()' returns a list of strings.

• Both 'read()' and 'readlines()' return the same type of data.

• 'read()' reads multiple lines at once, while 'readlines()' reads a single line.

• 'read()' is used for writing files, and 'readlines()' is for reading files.

How can you append data to an existing text file?

• Delete the existing file and create a new one with the data.

• Open the file in write mode and overwrite the data.

• Open the file in append mode and write the data.

• Open the file in read mode and write the data.

What is a CSV file and how is it different from a text file?

• A CSV file is a database format that requires special software to read.

• A CSV file is a structured text file that organizes data in rows and columns using commas as delimiters, while a text file is an unstructured file that can contain any text.

• A CSV file is a type of image file used for graphics.

• A CSV file is a binary file that cannot be opened in a text editor.

Which Python module is commonly used for handling CSV files?

• csv

• json

• txt

• xml

How do you read a CSV file using the 'csv' module?

• Use 'csv.load("file.csv")' to load the CSV data.

• Use 'import csv', then 'with open("file.csv", "r") as file: reader = csv.reader(file); for row in reader: print(row)'.

• Open the file with 'open("file.csv")' and read it line by line.

• Use 'import pandas as pd' to read the CSV file.

What is the purpose of the 'with' statement when handling files?

• The 'with' statement is a method for encrypting file contents.

• The 'with' statement is used to read files line by line.

• The 'with' statement ensures proper management of file resources by automatically closing the file after its block of code is executed.

• The 'with' statement allows multiple files to be opened simultaneously.

How do you write data to a CSV file in Python?

• Use the 'json' module to write data to a CSV file.

• Use the 'pickle' module to serialize data into a CSV format.

• Use the 'csv' module to write data to a CSV file by creating a writer object and using 'writerow()' or 'writerows()' methods.

• Write data to a CSV file using the 'open' function only.