Writelines() a bit confusing

[Gre7g Luterman]

"aiwarrior" <zubeido at yahoo.com.br> wrote in message 
news:1179578195.565952.244110 at u30g2000hsc.googlegroups.com...
> If file.WriteLines( seq ) accepts a list and it says it writes lines,
> why does it write the whole list in a single line. Be cause of that
> the reverse of file.writelines(seq) is not file.readlines().
> Are the assumptions i made correct? If yes why is this so?

readlines() and writelines() are complimentary.  readlines() leaves the line 
terminators intact. It does not strip them off. writelines() does not add in 
carriage returns for the same reason.  For example:

>>> D=open("temp.txt").readlines()
>>> D
['the quick\n', 'brown fox\n', 'jumps over\n', 'the lazy dog.']
>>> open("temp2.txt","w").writelines(D)

will create temp2.txt to be identical to temp.txt.