Example of adding and updating a sequence in Arvados, with required remove/save step to avoid certificate error

arvados_add_update.py

def simple_add_update():
    """Test adding and updating a collection to reproduce certificate error.
    """
    project_uuid = "pirca-j7d0g-h13mew3i5ya8cqq"
    name = "save_new_test"
    fname = "seqs.fa"
    avoid_an_error = True
    arvados_conn = get_connection_config()
    c = arvados.collection.Collection(apiconfig=arvados_conn)
    with c.open(fname, "wb") as writer:
        writer.write(">aseq\nGATC\n")
    c.save_new(name=name, owner_uuid=project_uuid)

    c2 = arvados.collection.Collection(c.manifest_locator(), apiconfig=arvados_conn)
    c2.remove(fname)
    if avoid_an_error:
        c2.save()
    with c2.open(fname, "wb") as writer:
        writer.write(">aseq\nGATTACA\n")
    c2.save()