create a helpers module to push some api functions into it (make the api code easier to read.

jedi/api/helpers.py

@@ -0,0 +1,17 @@
+"""
+Helpers for the API
+"""
+
+from jedi import debug
+from jedi.evaluate import helpers
+from jedi.parser import representation as pr
+
+
+def func_call_and_param_index(user_stmt, position):
+    debug.speed('func_call start')
+    call, index = None, 0
+    if call is None:
+        if user_stmt is not None and isinstance(user_stmt, pr.Statement):
+            call, index, _ = helpers.search_call_signatures(user_stmt, position)
+    debug.speed('func_call parsed')
+    return call, index