blank lines representation in python

[micklee74@hotmail.com]

hi
what is the correct way to represent blank lines in python (while
iterating a file) without regexp? I know one way is to use
re.search((line ,r'^$') to grab a blank line, but i wanna try not to use
regexp...
is it
1) if line == ''": dosomething() (this also means EOF right? )
2) if line is None: dosomething()
3) if not line: dosomething()
thanks

[Fredrik Lundh]

Re: blank lines representation in python

micklee74@hotma il.com wrote:
[color=blue]
> what is the correct way to represent blank lines in python (while
> iterating a file) without regexp? I know one way is to use
> re.search((line ,r'^$') to grab a blank line, but i wanna try not to use
> regexp...
> is it
> 1) if line == ''": dosomething() (this also means EOF right? )
> 2) if line is None: dosomething()
> 3) if not line: dosomething()
> thanks[/color]

if line == "\n": # look for a single newline
dosomething()

or

if not line:
... end of file ...
elif not line.strip(): # look for lines with nothing but whitespace
dosomething()

</F>