#!/usr/bin/python

import mrproject
import os

DURATION_OF_ONE_DAY = 60*24

app = mrproject.Application()
project = mrproject.Project(app)
project.load ("test.mrproject")
task = None
for task in project.get_all_tasks ():
    if task.get_property ("name") == "Logistics":
        break

duration = task.get_property ("duration")
duration = duration + DURATION_OF_ONE_DAY
task.set_property("duration", duration)

os.system ("mv test.mrproject test.mrproject~")
project.save_as ("test.mrproject", 0)