getattr -- get an attribute of a python object

Synopsis

Usage:

getattr(x, y)

x@@y
Inputs:
- x, a python object,
- y, a string,
Outputs:
- a python object,

Description

This is equivalent to the Python getattr function.

i1 : foo = pythonValue "'Hello, world!'"

o1 = Hello, world!

o1 : PythonObject of class str

i2 : (getattr(foo, "upper"))()

o2 = HELLO, WORLD!

o2 : PythonObject of class str

In Python, "." is generally used as a shortcut for this function, but it is not easily overloadable in Macaulay2. Instead, @@ may be used for this purpose, as its precedence is similar to "." In this case, y need not be a string.

i3 : foo@@lower()

o3 = hello, world!

o3 : PythonObject of class str

Ways to use getattr :

getattr(PythonObject,String)

For the programmer

The object getattr is a method function.