ual and return 1D array. It is faster than loading  whole file into memory. This single function could be used to parse EIGENVAL, PROCAR, DOCAR and similar files with just a combination of <cite>exclude, include,start,stop,step</cite> arguments.</p></li>
<li><dl>
<dt><strong>Parameters</strong></dt><dd><ul class="simple">
<li><p>path_or_islice: Path/to/file or <cite>itertools.islice(file_object)</cite>. islice is interesting when you want to read different slices of an opened file and do not want to open it