how to output every line in a file python

Question

if data find   masters      -1           f   open  masters txt            lines   f readline            for line in lines                 print lines                sck send  PRIVMSG     chan         str lines      r n                  f close     masters txt has a list of nicknames  how can I print every line from the file at once   The code I have only prints the first nickname  Your help will be appreciate it  Thanks

User · Answer

You could try this   It doesn t read all of f into memory at once  using the file object s iterator  and it closes the file when the code leaves the with block   if data find   masters      -1      with open  masters txt    r   as f          for line in f              print line             sck send  PRIVMSG     chan         line     r n     If you re using an older version of python  pre 2 6  you ll have to have  from   future   import with statement

User · Answer

Firstly  as  l33tnerd said  f close should be outside the for loop   Secondly  you are only calling readline once  before the loop  That only reads the first line  The trick is that in Python  files act as iterators  so you can iterate over the file without having to call any methods on it  and that will give you one line per iteration    if data find   masters      -1       f   open  masters txt        for line in f             print line             sck send  PRIVMSG     chan         line       f close     Finally  you were referring to the variable lines inside the loop  I assume you meant to refer to line   Edit  Oh and you need to indent the contents of the if statement

User · Answer

Did you try  for line in open  masters    r   readlines    print line      readline      only reads  a line   on the other hand  readlines     reads whole lines and gives you a list of all lines

User · Answer

Loop through the file   f   open  masters txt   lines   f readlines   for line in lines      print line

User · Answer

You probably want something like    if data find   masters      -1       f   open  masters txt        lines   f read   splitlines        f close        for line in lines           print line          sck send  PRIVMSG     chan         str line      r n     Don t close it every iteration of the loop and print line instead of lines   Also use readlines to get all the lines   EDIT removed my other answer - the other one in this discussion is a better alternative than what I had  so there s no reason to copy it   Also stripped off the  n with read   splitlines

[python] how to output every line in a file python

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