Hello all, I've found a simple fix that restores search functionality.
In the file /usr/share/doc/python-numpy-doc/html/search.html simply insert the line <script type="text/javascript" src="_static/searchtools.js"></script> below line the line that reads <script type="text/javascript" src="_static/doctools.js"></script> (that is line 27, I think). Then try searching something like 'arange'. The same fix works for the corresponding SciPy documentation issue at /usr/share/doc/python-scipy-doc/html/search.html . Yours t2
