Thank you so much guys. Just out of curiosity: can I do something like this to "square all even numbers in the range 1-10"? print [x^2 for x in range (1,11) if x % 2 == 0]
Or is there a better way of doing it? Thanks for the help, and I am really appreciate your help. Kit. On 1月19日, 上午12時30分, Steven D'Aprano <st...@remove-this- cybersource.com.au> wrote: > On Mon, 18 Jan 2010 08:07:41 -0800, Kit wrote: > > Hello Everyone, I am not sure if I have posted this question in a > > correct board. Can anyone please teach me: > > > What is a list compression in Python? > > Google "python list comprehension". > > If Google is broken for you, try Yahoo, or any other search engine. > > > Would you mind give me some list compression examples? > > Instead of this: > > L = [] > for x in range(10): > L.append(x**2) > > you can write: > > L = [x**2 for x in range(10)] > > Instead of this example: > > L = [] > for x in range(10): > if x % 2 == 0: > L.append(x**2) > > you can write: > > L = [x**2 for x in range(10) if x % 2 == 0] > > -- > Steven -- http://mail.python.org/mailman/listinfo/python-list