Jan 17, 2010 · There is a more elegant solution for extracting many lines: linecache (courtesy of "python: how to jump to a particular line in a huge text file?", a previous stackoverflow.com question). Quoting the python documentation linked above: Change the 4 to your desired line number, and you're on.

If you want to use Regex to get the line number of a specific word/phrase, use if re.match(r'chars of Interest', line) instead of if "chars of Interest" in line. Don't forget to add import re. –

Mar 21, 2024 · By default, the line numbers begin with the 0th index. There are various ways to read specific lines from a text file in python, this article is aimed at discussing them. Method 1: fileobject.readlines()

Feb 12, 2012 · # line of a file is line 1. line = next(islice(f, line_number - 1, line_number)) A very straightforward solution is. f.readlines()[line_number - 1] There's two ways: Use f.readlines() which will read the entire file into memory, and return it as a …

Jan 2, 2025 · With the help of fileinput.lineno() method, we can get the line number for every line on line read from input file by using fileinput.lineno() method. Syntax : fileinput.lineno() Return : Return the line number.

Feb 12, 2024 · In this article, we will learn how to get a line number and the filename of the Python script using the __file__ and __line__ attributes, the __file__ attribute and __LINE__ variable, the traceback module, and the inspect module.

Feb 14, 2025 · Learn how to read a specific line from a text file in Python using `readlines()`, `linecache.getline()`, and efficient looping techniques for quick access!

Jul 3, 2021 · You can use an index number as a line number to extract a set of lines from it. This is the most straightforward way to read a specific line from a file in Python. We read the entire file using this way and then pick specific lines from it as per our requirement. Use readlines()[start:end] to read range of lines. the start is the starting line ...

Aug 4, 2023 · Here we can obtain the line number in which a given word is present in a file using Python by reading the file line by line and keeping track of the line number where the word is found and below is an example code for that.

Sep 13, 2021 · In this article, I will go over the open() function, the read(), readline(), readlines(), close() methods, and the with keyword. What is the open () function in Python? If you want to read a text file in Python, you first have to open it. This is the basic syntax for Python's open() function: