In order to get completions for this module, one would have to either manually type to run the completion function again, or delete and then re-insert the period. The correct solution is, of course, to fix the Python omnicompletion module. However, this 'feature' is present in all default installations of Vim. imap pumvisible() ? "=(col('.')-1&&match(getline(line('.')), '\\.', \ col('.')-2) == col('.')-2)?\"\C-X>\C-O>\":\"\"" \ : ""