Best method for reading newline delimited files and discarding the newlines

Question

I am trying to determine the best way to handle getting rid of newlines when reading in newline delimited files in Python   What I ve come up with is the following code  include throwaway code to test   import os  def getfile filename results      f   open filename     filecontents   f readlines      for line in filecontents       foo   line strip   n        results append foo     return results  blahblah       getfile   tmp foo  blahblah   for x in blahblah      print x   Suggestions

User · Answer

I d do it like this   f   open  test txt   l    l for l in f readlines   if l strip    f close   print l

User · Answer

Just use generator expressions   blahblah    l rstrip   for l in open filename   for x in blahblah      print x   Also I want to advise you against reading whole file in memory -- looping over generators is much more efficient on big datasets

User · Answer

I use this  def cleaned  aFile        for line in aFile          yield line strip     Then I can do things like this   lines   list  cleaned  open  file   r         Or  I can extend cleaned with extra functions to  for example  drop blank lines or skip comment lines or whatever

User · Answer

for line in file   tmp foo        print line strip   n

User · Answer

lines   open filename  read   splitlines

User · Answer

What do you think about this approach   with open filename  as data      datalines    line rstrip   r n   for line in data      for line in datalines             do something awesome      Generator expression avoids loading whole file into memory and with ensures closing the file

User · Answer

Here s a generator that does what you requested  In this case  using rstrip is sufficient and slightly faster than strip   lines    line rstrip   n   for line in open filename     However  you ll most likely want to use this to get rid of trailing whitespaces too   lines    line rstrip   for line in open filename

[python] Best method for reading newline delimited files and discarding the newlines?

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