Dec 30, 2022 · How to remove blank lines from a .txt file in Python using the str.strip() Method. The str.strip() method in python removes all the spaces around the input string and returns the resulting string. We are going to use the following approach to carry out our desired task: Open the input and output .txt files in read and write mode(r,w).

Feb 13, 2018 · lines = (line.rstrip() for line in f_in) # All lines including the blank ones. lines = (line for line in lines if line) # Non-blank lines. Now, lines is all of the non-blank lines. This will save you from having to call strip on the line twice. If you want a list of lines, then you can just do: lines = (line.rstrip() for line in f_in) .

Nov 5, 2020 · If you want to remove blank lines from an existing file without writing to a new one, you can use random access instead.

Oct 17, 2023 · You can combine map and strip to remove spaces and use filter(None, iterable) to remove empty elements: string = "a\n \n\nb" list_of_str = string.split("\n") list_of_str = filter(None, map(str.strip, list_of_str)) list(list_of_str)

To remove blank lines from a file in Python, you can read the file line by line, check for empty or whitespace-only lines, and write the non-blank lines back to another file (or overwrite the original file).

Sep 5, 2024 · In this article, we are going to see how to delete the specific lines from a file using Python. Throughout this program, as an example, we will use a text file named months.txt on which various deletion operations would be performed. Method 1: Deleting a …

Oct 24, 2016 · One solution is to read all of the text into a list, then rewind to the start of the file and write out the desired lines. def remove_empty_lines(filename): """Overwrite the file, removing empty lines and lines that contain only whitespace.""" with open(filename, 'r+') as f: lines = f.readlines() f.seek(0) f.writelines(line for line in lines if ...

May 31, 2024 · In this article, we will explore different methods to remove empty lines in Python 3. In this method, we first read the file and store each line in a list. We then use list comprehension to filter out the empty lines by checking if the stripped line is not empty. Finally, we write the non-empty lines back to the file.

You can use below way to delete all blank lines: with open("new_file","r") as f: for i in f.readlines(): if not i.strip(): continue if i: print i, We can also write the output to file using below way:

Jul 3, 2021 · This article lets you know how to delete specific lines from a file in Python. For example, you want to delete lines #5 and #12. After reading this article, you’ll learn: How to remove specific lines from a file by line numbers; How to delete lines that match or contain the given text/string; How to delete the first and last line from a text ...