<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def shell(ctx):
 """ open an engineer shell """


    shell = code.InteractiveConsole({"engineer": getattr(ctx.parent, "widget", None)})
    shell.interact("\n".join([
        "Engineer connected to %s" % ctx.parent.params["host"],
        "Dispatch available through the 'engineer' object"
    ]))