Not tested

files_dirs

import os
import shutil
from distutils import dir_util

class DirAlreadyExists(Exception):
	pass

class FileAlreadyExists(Exception):
	pass

class FilesAndDirsService(object)
	
	@classmethod
	def create_a_dir(cls, path, dir_name):
		dir_to_create = '{}/{}'.format(path, dir_name)	
		if os.path.exists(dir_to_create):
			raise DirAlreadyExists('Could not create the dir {} because already exists'.format(dir_to_create))
		os.makedirs(dir_to_create)

	@classmethod
	def move_a_file(cls, path, new_path, file_name)
		current_file_path = '{}/{}'.format(path, file_name)
		new_file_path = '{}/{}'.format(new_path, file_name)
		if os.path.isfile(new_file_path):
			raise FileAlreadyExists('Could not create the file {} because already exists'.format(new_file_path))
		os.rename(current_file_path, new_file_path)

	@classmethod
	def move_a_dir(cls, path, new_path, dir_name)
		current_dir_path = '{}/{}'.format(path, dir_name)
		new_dir_path = '{}/{}'.format(new_path, dir_name)
		if os.path.exists(new_dir_path):
			raise DirAlreadyExists('Could not create the dir {} because already exists'.format(new_dir_path))
		os.rename(dir_path, new_dir_path)

	@classmethod
	def copy_a_file(cls, path, copy_path, file_name)
		file_path = '{}/{}'.format(path, file_name)
		copy_file_path = '{}/{}'.format(copy_path, file_name)
		if os.path.isfile(copy_file_path):
			raise FileAlreadyExists('Could not create the file {} because already exists'.format(copy_file_path))
		shutil.copyfile(file_path, copy_file_path)

	@classmethod
	def copy_a_dir(cls, path, new_path, dir_name)
		current_dir_path = '{}/{}'.format(path, dir_name)
		copy_dir_path = '{}/{}'.format(copy_path, dir_name)
		if os.path.exists(copy_dir_path):
			raise DirAlreadyExists('Could not create the dir {} because already exists'.format(copy_dir_path))
		os.makedirs(copy_dir_path)
		dir_util.copy_tree(current_dir_path, copy_dir_path)
		

	@classmethod
	def remove_a_file(cls, path, file_name)
		file_path = '{}/{}'.format(path, file_name)
		os.remove(file_path)