> Hi all, >> >> One thing I have never much liked about Python is its need for >> >> specifically sized arrays and lack of a dynamic, array-like data >> >> structure. For example, the following fails with a "list assignment >> >> index out of range" error: a=[] i=0 for l in open("file.txt", "r"): a[i]=l i+=1
>> >> > A python list and a python array are one and the same to my knowledge. Actually I looked it up, there is an array module. I've never used it. Lists are built in data type that act like what people mean when they say arrays -- an ordered list of values accessible by a positional index. The reason you get the exception is that you are trying to put something in a[0], and you defined a as empty, so it has no a[0] yet. len(a) == 0 initially. When you append a value to a, your first value is stored, in a[0], etc. Read about slices. They're fun, and informative to understand indexing concepts in python -- Joel Goldstick _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor