How do I specify new lines on Python when writing on files

Question

In comparison to Java  in a string   you would do something like  First Line r nSecond Line    So how would you do that in Python  for purposes of writing multiple lines to a regular file

User · Answer

Most escape characters in string literals from Java are also valid in Python  such as   r  and   n

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It depends on how correct you want to be   n will usually do the job  If you really want to get it right  you look up the newline character in the os package   It s actually called linesep    Note  when writing to files using the Python API  do not use the os linesep  Just use  n  Python automatically translates that to the proper newline character for your platform

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The new line character is  n  It is used inside a string   Example        print  First line  n Second line      where  n is the newline character   This would yield the result   First line  Second line   If you use Python 2  you do not use the parentheses on the print function

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The same way with   n   though you d probably not need the   r   Is there a reason you have it in your Java version  If you do need want it  you can use it in the same way in Python too

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In Python you can just use the new-line character  i e   n

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If you are entering several lines of text at once  I find this to be the most readable format   file write    Life s but a walking shadow  a poor player n  That struts and frets his hour upon the stage n  And then is heard no more  it is a tale n  Told by an idiot  full of sound and fury  n  Signifying nothing  n       The   at the end of each line escapes the new line  which would cause an error

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Worth noting that when you inspect a string using the interactive python shell or a Jupyter notebook  the  n and other backslashed strings like  t are rendered literally    gt  gt  gt  gotcha    Here is some random message      gt  gt  gt  gotcha      nAdditional content  n t    format  Yet even more great stuff     gt  gt  gt  gotcha  Here is some random message    nAdditional content  n tYet even more great stuff     The newlines  tabs  and other special non-printed characters are rendered as whitespace only when printed  or written to a file    gt  gt  gt  print      format gotcha   Here is some random message    Additional content      Yet even more great stuff

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n  separates the lines of a string  In the following example  I keep writing the records in a loop  Each record is separated by  n   f   open  jsonFile txt    w    for row index in range 2  sheet nrows      mydict1          PowerMeterId    row index   1       Service    Electricity        Building    JTC FoodHub        Floor   str Floor        Location   Location       ReportType    Electricity        System   System       SubSystem            Incomer            Category            DisplayName   DisplayName       Description   Description       Tag   tag       IsActive   1       DataProviderType   int 0        DataTable            mydict1 pop   id   None    f write str mydict1      n    f close

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n - simple newline character insertion works     Here s the test example - string with newline char  In  36   test line    Hi    n testing first line    n testing second line    n and third line          Output  In  37   print test line   Hi     testing first line    testing second line    and third line

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As mentioned in other answers   quot The new line character is  n  It is used inside a string quot   I found the most simple and readable way is to use the  quot format quot  function  using nl as the name for a new line  and break the string you want to print to the exact format you going to print it  python2  print  quot line1 nl  quot         quot line2 nl  quot         quot line3 quot  format nl  quot  n quot     python3  nl    quot  n quot  print f quot line1 nl  quot        f quot line2 nl  quot        f quot line3 quot    That will output  line1 line2 line3  This way it performs the task  and also gives high readability of the code

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Platform independent line breaker  Linux windows  amp  IOS  import os keyword    physical   os linesep    distancing  print keyword    Output   physical distancing

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Simplest solution  If you only call print without any arguments  it will output a blank line   print   You can pipe the output to a file like this  considering your example    f   open  out txt    w   print  First line   gt  gt  f print  gt  gt  f print  Second line   gt  gt  f f close     Not only is it OS-agnostic  without even having to use the os package   it s also more readable than putting  n within strings   Explanation  The print   function has an optional keyword argument for the end of the string  called end  which defaults to the OS s newline character  for eg   n  So  when you re calling print  hello    Python is actually printing  hello      n   Which means that when you re calling just print without any arguments  it s actually printing        n   which results in a newline   Alternative  Use multi-line strings   s      First line     Second line     Third line    f   open  out txt    w   print s  gt  gt  f f close

User · Answer

You can either write in the new lines separately or within a single string  which is easier   Example 1  Input  line1    hello how are you  line2    I am testing the new line escape sequence  line3    this seems to work    You can write the   n  separately   file write line1  file write   n   file write line2  file write   n   file write line3  file write   n     Output  hello how are you I am testing the new line escape sequence this seems to work   Example 2  Input  As others have pointed out in the previous answers  place the  n at the relevant points in your string   line    hello how are you nI am testing the new line escape sequence nthis seems to work   file write line    Output  hello how are you I am testing the new line escape sequence this seems to work

[python] How do I specify new lines on Python, when writing on files?

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