sudo emerge PyQt4
Calculating dependencies... done!
>>> Verifying ebuild Manifests...

>>> Emerging (1 of 1) dev-python/PyQt4-4.3.1 to /
 * PyQt-x11-gpl-4.3.1.tar.gz RMD160 ;-) ...                                                                                                           [ ok ]
 * PyQt-x11-gpl-4.3.1.tar.gz SHA1 ;-) ...                                                                                                             [ ok ]
 * PyQt-x11-gpl-4.3.1.tar.gz SHA256 ;-) ...                                                                                                           [ ok ]
 * PyQt-x11-gpl-4.3.1.tar.gz size ;-) ...                                                                                                             [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                                  [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                                 [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                                [ ok ]
 * checking PyQt-x11-gpl-4.3.1.tar.gz ;-) ...                                                                                                         [ ok ]
>>> Unpacking source...
>>> Unpacking PyQt-x11-gpl-4.3.1.tar.gz to /var/tmp/portage/dev-python/PyQt4-4.3.1/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/dev-python/PyQt4-4.3.1/work/PyQt-x11-gpl-4.3.1 ...
Traceback (most recent call last):
  File "configure.py", line 30, in <module>
    import sipconfig
ImportError: No module named sipconfig
make: *** No targets specified and no makefile found.  Stop.
 *
 * ERROR: dev-python/PyQt4-4.3.1 failed.
 * Call stack:
 *            ebuild.sh, line 1695:  Called dyn_compile
 *            ebuild.sh, line 1033:  Called qa_call 'src_compile'
 *            ebuild.sh, line   44:  Called src_compile
 *   PyQt4-4.3.1.ebuild, line   42:  Called die
 * The specific snippet of code:
 *      emake || die "emake failed"
 *  The die message:
 *   emake failed
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-python/PyQt4-4.3.1/temp/build.log'.
 *

 * Messages for package dev-python/PyQt4-4.3.1:

 *
 * ERROR: dev-python/PyQt4-4.3.1 failed.
 * Call stack:
 *            ebuild.sh, line 1695:  Called dyn_compile
 *            ebuild.sh, line 1033:  Called qa_call 'src_compile'
 *            ebuild.sh, line   44:  Called src_compile
 *   PyQt4-4.3.1.ebuild, line   42:  Called die
 * The specific snippet of code:
 *      emake || die "emake failed"
 *  The die message:
 *   emake failed
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-python/PyQt4-4.3.1/temp/build.log'.