<p>
                Constructs a docstring_options object which controls the appearance
                of function and member-function docstrings defined in the code that
                follows. If show_all is true, both the user-defined docstrings and
                the automatically generated Python and C++ signatures are shown.
                If show_all is false the <code class="computeroutput"><span class="identifier">__doc__</span></code>
                attributes are <code class="computeroutput"