Removing dh-php (0.28+ubuntu16.04.1+deb.sury.org+1) ...
Removing mercurial (3.7.3-1ubuntu1) ...
Removing mercurial-common (3.7.3-1ubuntu1) ...
/var/lib/dpkg/info/mercurial-common.prerm: 9: /var/lib/dpkg/info/mercurial-common.prerm: pyclean: not found
dpkg: error processing package mercurial-common (--remove):
 subprocess installed pre-removal script returned error exit status 127