Wednesday, March 26, 2008

Remove leading and trailing whitespace

To remove leading and trailing whitespace(or any trailing char):

  • Regular Expression :
    • s/^\s+//;
    • s/\s+$//;
  • Perl :
    • Chomp();
  • Python:
    • strip();

Monday, March 24, 2008

How to read and write text file in python

list1=file("filename.txt").readlines() #don't forget the parenthesis
set1=set(liste1) #cast it to a set

set1=[elem.strip() for elem in set1] #strip all the elements of the set by removing trailing characters such us /t or /n

To find the differences with another set :

To save into a file'filename.log','w')

First I add line return to each elem of the set
set4=[elem+"\n" for elem in set3]

Then I write the whole set into the file:


Sunday, March 23, 2008

top list of processes

command : top -u
OS : Linux & Mac OS
list the top running processes