Add a completion cache for numpy/tensorflow, fixes #1116

jedi/api/completion_cache.py

@@ -0,0 +1,25 @@
+_cache = {}
+
+
+def save_entry(module_name, name, cache):
+    try:
+        module_cache = _cache[module_name]
+    except KeyError:
+        module_cache = _cache[module_name] = {}
+    module_cache[name] = cache
+
+
+def _create_get_from_cache(number):
+    def _get_from_cache(module_name, name, get_cache_values):
+        try:
+            return _cache[module_name][name][number]
+        except KeyError:
+            v = get_cache_values()
+            save_entry(module_name, name, v)
+            return v[number]
+    return _get_from_cache
+
+
+get_type = _create_get_from_cache(0)
+get_docstring_signature = _create_get_from_cache(1)
+get_docstring = _create_get_from_cache(2)