test omnifunc implementation

README.md

@@ -52,3 +52,5 @@ Most useful is `IPyRun("string of code"[, silent])` which can be called to progr
     nnoremap <Leader>c :call IPyRun('close("all")',1)<cr>
 
 `IPyConnect(args...)` can likewise be used to connect with vimscript generated arguments.
+
+`IPyOmniFunc` can be used as `&completefunc`/`&omnifunc` for use with a completer framework. Note that unlike `<Plug><IPy-Complete)` this is synchronous and waits for the kernel, so if the kernel hangs this might hang nvim! For use with async completion like Deoplete it would be better to create a dedicated source.

rplugin/python/nvim_ipy.py

@@ -255,7 +255,7 @@ def ipy_run(self, args):
     @neovim.function("IPyComplete")
     def ipy_complete(self,args):
         line = self.vim.current.line
-        #FIXME: (upstream) this sometimes get wrong if 
+        #FIXME: (upstream) this sometimes get wrong if
         #completing just after entering insert mode:
         #pos = self.vim.current.buffer.mark(".")[1]+1
         pos = self.vim.funcs.col('.')-1
@@ -266,6 +266,23 @@ def ipy_complete(self,args):
         start = content["cursor_start"]+1
         self.vim.funcs.complete(start, content['matches'])
 
+    @neovim.function("IPyOmniFunc", sync=True)
+    def ipy_omnifunc(self,args):
+        findstart, base = args
+        if findstart:
+            if not self.has_connection:
+                return False
+            line = self.vim.current.line
+            pos = self.vim.funcs.col('.')-1
+
+            reply = self.waitfor(self.kc.complete(line, pos))
+            content = reply["content"]
+            start = content["cursor_start"]
+            self._matches = content['matches']
+            return start
+        else:
+            return self._matches
+
     @neovim.function("IPyObjInfo")
     def ipy_objinfo(self, args):
         word, level = args