hollowspook wrote: > Hi, there > > a = range(100) > > if I want to use No 7, 11, 56,90 in a, then the only way I do is [a[7], > a[11], a[56], a[90]]. > Is there any other way? >
I presume a = range(100) is just an indication that a is a list -- the literal answer to your question as asked is simply [7, 11, 56, 90] In the general case that a is *any* list (or anything else that supports the index protocol, e.g. a string, a tuple, an array.array instance, or some instance of a so-written class), you can use a "list comprehension". Example: | >>> a = 'qwertyuiopasdfghjklzxcvbnm' | >>> [a[x] for x in [25, 0, 13, 1]] | ['m', 'q', 'f', 'w'] Do try and find "list comprehension" in the manual and in your book or tutorial. It's useful for much more than the above. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
