ncm2-neoinclude is source for NCM2, it depends on Shougo/neoinclude.vim
neoinclude provides include completion for neocomplete, deoplete, and ncm1
For C, when you type #include <, it will show the header file candidates.
For Python, when you type import xx, it will show the import candidates.
neoinclude also supports some other languages.
This plugin is a wrap for neoinclude to support ncm2.
Assuming that you are using vim-plug
Plug 'ncm2/ncm2-neoinclude' | Plug 'Shougo/neoinclude.vim'