use types.SimpleNamespace instead of custom NS class

mitmproxy/addons/script.py

@@ -4,6 +4,7 @@ import shlex
 import sys
 import threading
 import traceback
+import types
 
 from mitmproxy import exceptions
 from mitmproxy import ctx
@@ -14,19 +15,6 @@ import watchdog.events
 from watchdog.observers import polling
 
 
-class NS:
-    def __init__(self, ns):
-        self.__dict__["ns"] = ns
-
-    def __getattr__(self, key):
-        if key not in self.ns:
-            raise AttributeError("No such element: %s", key)
-        return self.ns[key]
-
-    def __setattr__(self, key, value):
-        self.__dict__["ns"][key] = value
-
-
 def parse_command(command):
     """
         Returns a (path, args) tuple.
@@ -113,8 +101,8 @@ def load_script(path, args):
             return
     ns = {'__file__': os.path.abspath(path)}
     with scriptenv(path, args):
-        exec(code, ns, ns)
-    return NS(ns)
+        exec(code, ns)
+    return types.SimpleNamespace(**ns)
 
 
 class ReloadHandler(watchdog.events.FileSystemEventHandler):

test/mitmproxy/addons/test_script.py

@@ -18,13 +18,6 @@ import watchdog.events
 from .. import tutils as ttutils
 
 
-def test_ns():
-    n = script.NS({})
-    n.one = "one"
-    assert n.one == "one"
-    assert n.__dict__["ns"]["one"] == "one"
-
-
 def test_scriptenv():
     with taddons.context() as tctx:
         with script.scriptenv("path", []):

test/mitmproxy/test_examples.py

@@ -150,7 +150,7 @@ class TestHARDump:
 
     def test_format_cookies(self):
         m, sc = tscript("complex/har_dump.py", "-")
-        format_cookies = sc.ns.ns["format_cookies"]
+        format_cookies = sc.ns.format_cookies
 
         CA = cookies.CookieAttrs