["python","file","list","file-io","newline"]
Writing a list to a file with Python, with newlines

How do I write a list to a file? writelines() doesn't insert newline characters, so I need to do: f.writelines([f"{line}\n" for line in lines])
Use a loop: with open('your_file.txt', 'w') as f: for line in lines: f.write(f"{line}\n") For Python <3.6: with open('your_file.txt', 'w') as f: for line in lines: f.write("%s\n" % line) For Python 2, one may also use: with open('your_file.txt', 'w') as f: for line in lines: print >> f, line If you're keen on a single function call, at least remove the square brackets [], so that the strings to be printed get made one at a time (a genexp rather than a listcomp) -- no reason to take up all the memory required to materialize the whole list of strings.