I tried it, and there is a funny thing. I was wondering, how this factory yields articles with more than 3 digits in title. I modified your expression first:<br>gen = RegexFilterPageGenerator(PrefixingPageGenerator(&quot;kkStB&quot;), r&quot;kkStB [0-9]&quot;)<br>
and after it:<br>gen = RegexFilterPageGenerator(PrefixingPageGenerator(&quot;kkStB&quot;), r&quot;kk&quot;)<br>and the same list was generated in every case, as your one.<br>So the outer generator seems useless.<br><br><div class="gmail_quote">
2010/8/10 Merlijn van Deen <span dir="ltr">&lt;<a href="mailto:valhallasw@arctus.nl">valhallasw@arctus.nl</a>&gt;</span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="gmail_quote"><br><div><div><div>&gt;&gt;&gt; gen = RegexFilterPageGenerator(PrefixingPageGenerator(&quot;kkStB&quot;), r&quot;kkStB [0-9][0-9]?[0-9]?&quot;)</div><div>&gt;&gt;&gt; for page in gen:</div><div>...   print page</div>


<div>...</div><div>[[KkStB 1]]</div><div>[[KkStB 10]]</div><div>[[KkStB 105]]</div><div>[[KkStB 106]]</div><div>[[KkStB 108]]</div><div>[[KkStB 110]]</div><div>[[KkStB 110.500]]</div><div>[[KkStB 129]]</div><div>[[KkStB 14]]</div>


<div>[[KkStB 151]]</div><div>[[KkStB 166]]</div><div>[[KkStB 17]]</div><div>[[KkStB 179]]</div><div>[[KkStB 180]]</div><div>[[KkStB 180.500]]</div><div>[[KkStB 205]]</div><div>[[KkStB 206]]</div><div>[[KkStB 207]]</div><div>


[[KkStB 210]]</div><div>[[KkStB 211]]</div><div>[[KkStB 229]]</div><div>[[KkStB 231]]</div><div>[[KkStB 27]]</div><div>[[KkStB 270]]</div><div>[[KkStB 306]]</div><div>[[KkStB 31.01–11]]</div><div>[[KkStB 310]]</div><div>

[[KkStB 310.300]]</div>
<div>[[KkStB 32]]</div><div>[[KkStB 329]]</div><div>[[KkStB 378]]</div><div>[[KkStB 393]]</div><div>[[KkStB 4]]</div><div>[[KkStB 406]]</div><div>[[KkStB 46]]</div><div>[[KkStB 5]]</div><div>[[KkStB 506]]</div><div>[[KkStB 571]]</div>


<div>[[KkStB 6]]</div><div>[[KkStB 60]]</div><div>[[KkStB 7]]</div><div>[[KkStB 76 sorozatú szerkocsi]]</div></div></div><div><br></div><div><br><br></div></div></blockquote></div><br>-- <br>Bináris<br>