How to Delete Specific Lines from a Text File in Python?

Deleting Specific Lines from a Text File in Python

When working with text files, tasks like removing specific lines may arise. In Python, it's possible to delete a particular line from a text file by utilizing a simple technique. Let's dive into a step-by-step solution.

Step 1: Read the File and Obtain its Lines

Begin by opening the text file using the "r" mode (read mode). Read each line into a list called "lines" using the "readlines()" method. This gives you access to all the lines in the file.

with open("yourfile.txt", "r") as f:
    lines = f.readlines()

Step 2: Reopen the File for Writing

Next, reopen the same text file in "w" mode (write mode). This allows you to make changes to the file's contents.

with open("yourfile.txt", "w") as f:

Step 3: Iteratively Write Back Lines

Now, iterate through each line in the "lines" list. Compare each line with the nickname you wish to delete using the "strip('n')" method. This removes any newline characters to ensure an accurate comparison.

    for line in lines:
        if line.strip("\n") != "nickname_to_delete":
            f.write(line)

Step 4: Save the Changes

By excluding the line you want to delete from the write operation, you effectively remove it from the file. Close the file to save the changes.

# Implicitly closes the file

Additional Note:

Remember, if your file does not end with a newline character, it's crucial to strip the newline character from your comparison. This ensures that the last line is correctly processed and deleted.

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