py.path模块

# https://py.readthedocs.io/en/latest/path.html
import os
dir_path = "/home/lw/"
os.path.join("/home/lw/", "view.py")

更推荐使用
from py.path import local
local(dir_path).join("view.py")  # 会将传递进来的路径变为本地绝对路径