import os
import shutil
import sys

# print out python version info
print('\n' + '-' * 50)
print('Python version info:')
print(sys.version)
print('-' * 50 + '\n')

# clean up existing files
for pth in ['demo_files', 'demo_files2', 'demo_files3', '/tmp/demo_files']:
    if os.path.exists(pth):
        shutil.rmtree(pth)

# create a directory tree for copying
os.mkdir('demo_files')
with open('demo_files/example.txt', 'w') as fh:
    fh.write('example')

# copy files across filesystems
print('Copying NFS --> /tmp')
shutil.copytree('demo_files', '/tmp/demo_files')
print('Copying /tmp --> NFS')
shutil.copytree('/tmp/demo_files', 'demo_files2')
print('Copying NFS --> NFS')
shutil.copytree('demo_files', 'demo_files3')