Writing string to a file on a new line every time

Question

I want to append a newline to my string every time I call file write    What s the easiest way to do this in Python

User · Answer

Another solution that writes from a list using fstring

lines = ['hello','world']
with open('filename.txt', "w") as fhandle:
  for line in lines:
    fhandle.write(f'{line}\n')

And as a function

def write_list(fname, lines):
    with open(fname, "w") as fhandle:
      for line in lines:
        fhandle.write(f'{line}\n')

write_list('filename.txt', ['hello','world'])

User · Answer

I really didn t want to type  n every single time and  matthause s answer didn t seem to work for me  so I created my own class class File         def   init   self  name  mode  w            self f   open name  mode  buffering 1               def write self  string  newline True           if newline              self f write string     n           else              self f write string   And here it is implemented f   File  console log    f write  This is on the first line   f write  This is on the second line   newline False  f write  This is still on the second line   f write  This is on the third line    This should show in the log file as This is on the first line This is on the second lineThis is still on the second line This is on the third line

User · Answer

file path     path to yourfile txt  with open file path   a   as file      file write  This will be added to the next line n     or  log file   open  log txt    a   log file write  This will be added to the next line n

User · Answer

Use   n    file write  My String n     See the Python manual for reference

User · Answer

You can use    file write your string     n

User · Answer

Unless write to binary files  use print  Below example good for formatting csv files   def write row file    columns       print  columns  sep   t   end   n   file file     Usage   PHI   45 with open  file csv    a    as f      write row f   header    phi    PHI   serie no  2       write row f     newline     write row f  data 0   data 1     Notes    print documentation          format 1   the second   - https   pyformat info   PEP-3101   t  - tab character  columns in function definition - dispatches any number of arguments to list - see question on  args  amp    kwargs

User · Answer

If you use it extensively  a lot of written lines   you can subclass  file    class cfile file        subclass file to have a more convienient use of writeline     def   init   self  name  mode    r            self   file   init   self  name  mode       def wl self  string           self writelines string     n     Now it offers an additional function wl that does what you want   fid   cfile  filename txt    w   fid wl  appends newline charachter   fid wl  is written on a new line   fid close     Maybe I am missing something like different newline characters   n   r       or that the last line is also terminated with a newline  but it works for me

User · Answer

This is the solution that I came up with trying to solve this problem for myself in order to systematically produce  n s as separators  It writes using a list of strings where each string is one line of the file  however it seems that it may work for you as well   Python 3      Takes a list of strings and prints it to a file  def writeFile file  strList       line   0     lines          while line  lt  len strList           lines append cheekyNew line    strList line           line    1     file   open file   w       file writelines lines      file close     Returns   n  if the int entered isn t zero  otherwise     def cheekyNew line       if line    0          return   n      return

User · Answer

Ok  here is a safe way of doing it  with open  example txt    w   as f   for i in range 10     f write str i 1     f write   n      This writes 1 to 10 each number on a new line

User · Answer

Just a note  file isn t supported in Python 3 and was removed  You can do the same with the open built-in function   f   open  test txt    w   f write  test n

User · Answer

You can do this in two ways   f write  text to write n     or  depending on your Python version  2 or 3    print  gt  gt f   text to write            Python 2 x print  text to write   file f        Python 3 x

User · Answer

you could do   file write your string     n     as suggested by another answer  but why using string concatenation  slow  error-prone  when you can call file write twice   file write your string  file write   n     note that writes are buffered so it amounts to the same thing

[python] Writing string to a file on a new line every time

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