import os

def mkfile(filename, body=None):

with open(filename, "wt") as f:

f.write(body or filename)

def make_example_dir(top):

if not os.path.exists(top):

os.mkdir(top)

curdir = os.getcwd()

os.chdir(top)

os.mkdir("dir1")

os.mkdir("dir2")

mkfile("dir1/file_only_in_dir1")

mkfile("dir2/file_only_in_dir2")

os.mkdir("dir1/dir_only_in_dir1")

os.mkdir("dir2/dir_only_in_dir2")

os.mkdir("dir1/common_dir")

os.mkdir("dir2/common_dir")

mkfile("dir1/common_file", "this file is the same")

os.link("dir1/common_file", "dir2/common_file")

mkfile("dir1/contents_differ")

mkfile("dir2/contents_differ")

# update the access and modification times so most of the stat results will match.

st = os.stat("dir1/contents_differ")

os.utime("dir2/contents_differ", (st.st_atime, st.st_mtime))

mkfile("dir1/file_in_dir1", "This is a file in dir1")

os.mkdir("dir2/file_in_dir1")

os.chdir(curdir)

if __name__ == "__main__":

os.chdir(os.path.dirname(__file__) or os.getcwd())

make_example_dir("example")

make_example_dir("example/dir1/common_dir")

make_example_dir("example/dir2/common_dir")