setitem -- set elements of mutable python sequences

Synopsis

Usage:

setitem(x, y, e)

x_y = e
Inputs:
- x, a python object,
- y, a thing,
- e, a thing,

Description

You may set elements of mutable python sequences using setitem or the shortcut _. This is equivalent to square brackets ([]) in Python. For example, this works for lists.

i1 : x = pythonValue "[1,2,3,4]"

o1 = [1, 2, 3, 4]

o1 : PythonObject of class list

i2 : setitem(x, 0, 5)

i3 : x

o3 = [5, 2, 3, 4]

o3 : PythonObject of class list

It also works for dictionaries.

i4 : x = pythonValue "{'spam':1,'eggs':2}"

o4 = {'spam': 1, 'eggs': 2}

o4 : PythonObject of class dict

i5 : x_"ham" = 3

i6 : x

o6 = {'spam': 1, 'eggs': 2, 'ham': 3}

o6 : PythonObject of class dict

Ways to use setitem :

setitem(PythonObject,Thing,Thing)

For the programmer

The object setitem is a method function.