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python ±Ê¼Ç for loop and extend, append

list.append(item)
list.extend(sequence)
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python howto
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list.append(x)Add an item to the end of the list; equivalent to a[len(a):] = [x].a[len(a):] ÊÇÒ»¸ölist£¬sliceµÃµ½µÄÒ»¸ölist£¬Ï൱ÓÚ°ÑÕâÒ»¶Î½ØÈ¡³öÀ´µÄlist£¬ÒªÊǵÈÓÚÒ»¸ölist b£¬Ï൱ÓÚÔÚaµÄĩβÌí¼ÓÁËb,µ«ÊÇbÕû¸öÊÇÒ»¸öÔªËØ¡£>>> c.append([1,2,3])>>> c[1, 2, 3, 4, [1, 2, 3]]list.extend(L)Extend the list by appending all the items in the given list; equivalent to a[len(a):] = L.
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For loop, for(i=0; i<n; i++) in python is for i in range(0, n)
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print 'these items are:'
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print item,
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print 'my shopping list is now', shoplist
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