.. invisible-code-block: python # change to the temp directory import os original_dir = os.getcwd() os.chdir(tempdir.path) To construct a configuration file using the :mod:`ConfigParser` module, you would do the following: .. code-block:: python from configparser import ConfigParser config = ConfigParser() config.add_section('A Section') config.set('A Section', 'dir', 'frob') f = open('example.cfg','w') config.write(f) f.close() The generated configuration file will be as follows: .. topic:: example.cfg :class: read-file :: [A Section] dir = frob .. config parser writes whitespace at the end, be careful when testing! .. invisible-code-block: python # change out again import os os.chdir(original_dir)