How Can I Write a Python List to a File with Newlines?-Python Tutorial-php.cn

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

Mary-Kate Olsen

Release： 2024-12-09 06:46:10

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

Writing a List to a File with Python, Including Newlines

To write a list to a file while inserting newlines, there are several approaches to consider.

Using a Loop:

This method involves iterating through the list and writing each line to the file with a newline character added.

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

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For Python <3.6:

In earlier versions of Python, use the following syntax:

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

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For Python 2:

For Python 2, this approach is also viable:

with open('your_file.txt', 'w') as f:
    for line in lines:
        print >> f, line<p><strong>Using a List Comprehension (Efficient):</strong></p>
<p>To avoid creating an unnecessary intermediate list, remove the square brackets [] in the list comprehension. This produces a generator expression instead, which is more memory-efficient.</p>
<pre class="brush:php;toolbar:false">with open('your_file.txt', 'w') as f:
    f.writelines(f"{line}\n" for line in lines)

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