Append is broken.

[rtohid]

from phylanx import Phylanx

@Phylanx(debug=1)
def test_append():
    a = []
    append(a, 1)

    return a

print(test_append())

expecting [1], getting []:

define(
    test_append,
    lambda(
        block(
            define(
                a,
                list()
            ),
            append(a, 1),
            a
        )
    )
)
[]

[hkaiser]

@rtohid I think the problem is that PhySL objects are never changed in-place. The following should work as expected:

from phylanx import Phylanx

@Phylanx
def test_append():
    a = []
    a = append(a, 1)
    return a

print(test_append())

I'm not sure whether we should do the corresponding transformations in the frontend (i.e. transforming append(a, 1) into a = append(a, 1)). What do you say?