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/var/lib/dpkg/info/ibus.prerm: 20: /var/lib/dpkg/info/ibus.prerm: pyclean: not found
dpkg: warning: subprocess old pre-removal script returned error exit status 127
dpkg: trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 20: /var/lib/dpkg/tmp.ci/prerm: pyclean: not found
dpkg: error processing archive /var/cache/apt/archives/ibus_1.5.5-1ubuntu3.2_amd64.deb (--unpack):
 subprocess new pre-removal script returned error exit status 127