I've been trying to use more list comprehensions recently.
I was just fleshing something out which brought on my post. On Fri, 29 Oct 2010 09:15:47 -0400, Henry Olders wrote: When dealing with lists, list comprehensions are shorter and easier to work with: l=['red','green','orange','blue','red','white'] [x for x in l if x in ['red','blue']] Henry On 2010-10-28, at 10:21 , Dan Ross wrote: I don't think this is Mac specific, but I wonder if someone could explain why these two groups of code behave differently: [code] colors = ['red', 'green', 'blue', 'orange', 'fuscia', 'black', 'white'] list_of_matches = [] for x in colors: if x == 'red' or 'green' or 'blue': list_of_matches.append(x) print list_of_matches list_of_matches2 = [] for x in colors: if x == 'red': list_of_matches2.append(x) elif x == 'green': list_of_matches2.append(x) elif x == 'blue': list_of_matches2.append(x) else: pass print list_of_matches2 [/code] list_of_matches contains every item in colors. list_of_matches2 only contains the matches, as I would expect. I don't get it...... Thanks, Dan
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