How Can I Write a Python List to a File with Newlines Between Each Item?

Writing a List to a File with Python, Including Newlines

When writing a list to a file using Python, it's common to encounter the issue of not inserting newline characters. The writelines() method can be used to write a list of items to a file, but it does not automatically add newlines between them. To resolve this issue, a more elaborate approach is required.

One method involves using a loop to iterate over each line in the list and writing it to the file along with a newline character:

with open('your_file.txt', 'w') as f:
    for line in lines:
        f.write(f"{line}\n")

Prior to Python 3.6, the following syntax was used:

with open('your_file.txt', 'w') as f:
    for line in lines:
        f.write("%s\n" % line)

Additionally, for Python 2, the following syntax was also available:

with open('your_file.txt', 'w') as f:
    for line in lines:
        print >> f, line

If you prefer a single function call, you can optimize it by removing square brackets from the list, allowing for the individual strings to be written one at a time:

with open('your_file.txt', 'w') as f:
    f.writelines(f"{line}\n" for line in lines)

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