How to remove empty lines with or without whitespace in Python

Question

I have large string which I split by newlines  How can I remove all lines that are empty   whitespace only    pseudo code   for stuff in largestring     remove stuff that is blank

User · Answer

Try list comprehension and string strip      gt  gt  gt  mystr    L1 nL2 n nL3 nL4 n   n nL5   gt  gt  gt  mystr split   n     L1    L2        L3    L4              L5    gt  gt  gt   line for line in mystr split   n   if line strip            L1    L2    L3    L4    L5

User · Answer

If you are not willing to try regex  which you should   you can use this   s replace   n n    n     Repeat this several times to make sure there is no blank line left  Or chaining the commands    s replace   n n    n   replace   n n    n       Just to encourage you to use regex  here are two introductory videos that I find intuitive      Regular Expressions  Regex  Tutorial     Python Tutorial  re Module

User · Answer

I use this solution to delete empty lines and join everything together as one line  match p   re sub r  s 2        my txt    my txt is text above

User · Answer

Surprised a multiline re sub has not been suggested  Oh  because you ve already split your string    But why      gt  gt  gt  import re  gt  gt  gt  a    Foo n  nBar nBaz n n   Garply n   n   gt  gt  gt  print a Foo  Bar Baz          Garply    gt  gt  gt  print re sub r  n s  n    n  a re MULTILINE   Foo Bar Baz         Garply   gt  gt  gt

User · Answer

My version   while    in all lines      all lines pop all lines index

User · Answer

you can simply use rstrip       for stuff in largestring          print stuff rstrip   n

User · Answer

Same as what  NullUserException said  this is how I write it   removedWhitespce   re sub r   s         line

User · Answer

lines   bigstring split   n   lines    line for line in lines if line strip

User · Answer

Using regex   if re match r   s     line         line is empty  has only the following   t n r and whitespace    Using regex   filter     filtered   filter lambda x  not re match r   s     x   original    As seen on codepad

User · Answer

I also tried regexp and list solutions  and list one is faster   Here is my solution  by previous answers    text     n  join  ll rstrip   for ll in original text splitlines   if ll strip

[python] How to remove empty lines with or without whitespace in Python

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