First working version

autoload/ncm2_khard.vim

@@ -12,7 +12,7 @@ let g:ncm2_khard#source = extend(get(g:, 'ncm2_khard#source', {}), {
             \ 'name': 'khard',
             \ 'ready': 0,
             \ 'priority': 5,
-            \ 'mark': 'b',
+            \ 'mark': 'email',
             \ 'scope': ['mail'],
             \ 'complete_pattern': ['^To: ', '^Cc: ', '^Bcc: '],
             \ 'on_complete': 'ncm2_khard#on_complete',
@@ -24,10 +24,13 @@ func! ncm2_khard#init()
 endfunc
 
 func! ncm2_khard#on_warmup(ctx)
-    call g:ncm2_khard#proc.jobstart()
+    call g:ncm2_khard#proc.try_notify('on_warmup', a:ctx)
 endfunc
 
 func! ncm2_khard#on_complete(ctx)
     call g:ncm2_khard#proc.try_notify('on_complete', a:ctx)
 endfunc
 
+func! ncm2_khard#on_event(event)
+    call g:ncm2_khard#proc.try_notify('on_event', a:event, bufnr('%'))
+  endfunc

pythonx/ncm2_khard.py

@@ -3,8 +3,6 @@
 import vim
 import subprocess
 from ncm2 import Ncm2Source, getLogger
-import re
-from copy import deepcopy
 
 logger = getLogger(__name__)
 
@@ -12,18 +10,15 @@ logger = getLogger(__name__)
 class Source(Ncm2Source):
 
     def on_warmup(self, ctx):
-        shell_command = 'khard email --parsable | cut -f 1,2'
-        self.dictionary = subprocess.run(shell_command, shell = True, capture_output = True).stdout.decode('utf8').split('\n')
+        bufnr = ctx['bufnr']
+        shell_cmd = "khard email --parsable | cut -f 1,2 | sed -r 's/(.*)\t(.*)/\\2 <\\1>/'"
+        self.matches = subprocess.run(shell_cmd, shell = True, capture_output = True).stdout.decode('utf8').split('\n')
 
     def on_complete(self, ctx):
-        base = ctx['base']
-        # matcher = self.matcher_get(ctx)
-        # matches = []
-
-
-        self.complete(ctx, ctx['startccol'], self.dictionary)
+        self.complete(ctx, ctx['startccol'], self.matches)
 
 
 source = Source(vim)
 
+on_warmup = source.on_warmup
 on_complete = source.on_complete