complete-c pydf -l mounts -r-d'file to get mount information from. On normal Linux systems only /etc/mtab or /proc/mounts make sense. Some other Unices use /etc/mnttab. Use /proc/mounts when /etc/mtab is corrupted or inaccessible (the output looks a bit weird in this case).'
complete-c pydf -s B -l show-binds -d'show \'mount --bind\' mounts'
complete-c pydf -s i -l inodes -d'show inode instead of block usage'