[Tutor] Python equivalent of Java Vecor?

[Daniel Yoo]

> "Does Python have something equivalent to Java's Vector?  For instance,
> most of the time if you want to use an array you have to declare the
> size up front.  Java has a Vector class which is an array of objects
> which grows as you add things to it.

Sure --- Python has as a basic type the list.  Here's how to construct an
empty list:

    mylist = []

Getting the length it easy too:

    print len(mylist)

Appending to it is similar to Java:

    mylist.append(42)
    mylist.append("Hello")

Getting at an arbitrary element is like an array operator:

###
>>> mylist = ['this', 'is', 'a', 'test']
>>> mylist[1]
'is'
###

Doing an iteraton over a list uses a simple 'for' loop:

    for element in mylist:
        print element

I'm not sure what the consensus is on making a presizing array --- I use
this:

    mylist = [0] * 10

to get a zeroed list of 10 elements.


Good luck!