[Tutor] Tweaking list comprehensions

[Liam Clarke]

Hello, 

I am fine tuning list comprehensions (at least my understandng
thereof), and I'm not near a Python interpreter at the moment, so I
was wondering if someone could tell me if I did OK -

def approachA(files):

	isHTML = []
	for filename in files:
		if filename.endswith('.htm') or filename.endswith('.html'):
			isHTML.append(filename)
	return isHTML

def approachB(files):

	isHTML = [filename if filename.endswith('.htm') or\
 		  filename.endswith(.html') for filename in files] 
	return isHTML

I wanted approachB to be the list comprehension verstion of approachA.
Did I get the syntax right? All seems somewhat back to front to me,
although when read the comprehension does sorta make sense in a
twisted way.

Feels almost.. Perlesque in it's perverse compactness. That said,
saving myself from the cascading sequential conditionals/loops of
approach A is good, I feel. When it's 2am in the morning, and I've run
out of coffee, 90% of my bugs have been due to the 'cascades' and one
misplaced tab.

Regards, 


Liam Clarke





-- 
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.