What Does the readlines() Method Do in Python? Explained
Discover how Python's readlines() method reads file lines into a list, preserving newline characters for easy text processing.
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In Python, `readlines()` is a file method used to read all the lines in a file and return them as a list. Each line in the list is an item in the list, and the newline characters (`\n`) are kept intact. This method is particularly useful for iterating over a file line by line or when working with files in a list context. For instance, `with open('file.txt') as f: lines = f.readlines()` will read 'file.txt' into `lines`, allowing for easy manipulation or iteration over each line.
FAQs & Answers
- What is the difference between readlines() and readline() in Python? readlines() reads all lines of a file and returns them as a list, whereas readline() reads the file one line at a time, returning a single line with each call.
- Does readlines() include newline characters at the end of each line? Yes, the readlines() method preserves newline characters (\n) at the end of each line in the returned list.
- How can I use readlines() to iterate over a file line by line? You can call readlines() to get all lines as a list, then loop through the list to process each line individually.