Reading And Writing Files

Exercise: Reading And Writing Files

How can you read and print the lines containing the word "Python" in a case-insensitive manner from a file named "code.txt"?

with open("code.txt", "r") as file:
    lines = file.readlines()
    for line in lines:
        if "Python" in line.lower():
            print(line)

print_python_lines("code.txt")

with open("code.txt", "r") as file:
    print(file.read("Python"))

with open("code.txt", "r") as file:
    for line in file:
        if "Python".casefold() in line:
            print(line)

Answer: A

Using line.lower() to make the comparison case-insensitive.

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What is the purpose of the file.readable() method?

Checks if the file is open for reading

Reads the file content

Checks if the file is a readable text file

Reads the file in binary mode

Answer: A

file.readable() checks if the file is open for reading.

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How can you check if a file named "data.csv" is a valid CSV file?

if is_valid_csv("data.csv"):

if is_csv_file("data.csv"):

if validate_csv("data.csv"):

if os.path.iscsv("data.csv"):

Answer: B

Checking if a file has a CSV extension to determine if it's a valid CSV file.

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How can you create a new text file named "new_file.txt" and write the text "Hello, World!" to it?

new_file("new_file.txt", "Hello, World!")

with open("new_file.txt", "w") as file:
    write_text(file, "Hello, World!")

text.write("new_file.txt", "Hello, World!")

with open("new_file.txt", "w") as file:
    file.write("Hello, World!")

Answer: D

Using a context manager to open the file and writing the text to it.

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What is the purpose of the file.writelines() method?

Writes a list of strings to a file

Writes the buffered data to the file

Writes a list of dictionaries to a file

Writes a list of numbers to a file

Answer: A

file.writelines() writes a list of strings to a file.

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