python · terryjreedy · Mar 23, 2019 · Mar 22, 2019 · Mar 23, 2019 · Mar 23, 2019
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,8 @@ Released on 2019-10-20?
 ======================================


+bpo-36405: Use dict unpacking in idlelib and remove unneeded __main__ imports.
+
 bpo-36396: Remove fgBg param of idlelib.config.GetHighlight().
 This param was only used twice and changed the return type.


diff --git a/Lib/idlelib/autocomplete.py b/Lib/idlelib/autocomplete.py
@@ -14,7 +14,6 @@
 from idlelib import autocomplete_w
 from idlelib.config import idleConf
 from idlelib.hyperparser import HyperParser
-import __main__

 # This string includes all chars that may be in an identifier.
 # TODO Update this here and elsewhere.
@@ -182,8 +181,7 @@ def fetch_completions(self, what, mode):
        else:
            if mode == COMPLETE_ATTRIBUTES:
                if what == "":
-                    namespace = __main__.__dict__.copy()
-                    namespace.update(__main__.__builtins__.__dict__)
+                    namespace = {**__builtins__.__dict__, **globals()}
                    bigl = eval("dir()", namespace)
                    bigl.sort()
                    if "__all__" in bigl:
@@ -218,10 +216,8 @@ def fetch_completions(self, what, mode):
            return smalll, bigl

    def get_entity(self, name):
-        """Lookup name in a namespace spanning sys.modules and __main.dict__"""
-        namespace = sys.modules.copy()
-        namespace.update(__main__.__dict__)
-        return eval(name, namespace)
+        "Lookup name in a namespace spanning sys.modules and globals()."
+        return eval(name, {**sys.modules, **globals()})


 AutoComplete.reload()

diff --git a/Lib/idlelib/calltip.py b/Lib/idlelib/calltip.py
@@ -12,7 +12,6 @@

 from idlelib import calltip_w
 from idlelib.hyperparser import HyperParser
-import __main__


 class Calltip:
@@ -100,13 +99,12 @@ def fetch_tip(self, expression):

 def get_entity(expression):
    """Return the object corresponding to expression evaluated
-    in a namespace spanning sys.modules and __main.dict__.
+    in a namespace spanning sys.modules and globals().
    """
    if expression:
-        namespace = sys.modules.copy()
-        namespace.update(__main__.__dict__)
+        namespace = {**sys.modules, **globals()}
        try:
-            return eval(expression, namespace)
+            return eval(expression, namespace)  # Only protect user code.
        except BaseException:
            # An uncaught exception closes idle, and eval can raise any
            # exception, especially if user classes are involved.

diff --git a/Misc/NEWS.d/next/IDLE/2019-03-23-01-45-56.bpo-36405.m7Wv1F.rst b/Misc/NEWS.d/next/IDLE/2019-03-23-01-45-56.bpo-36405.m7Wv1F.rst
@@ -0,0 +1 @@
+Use dict unpacking in idlelib and remove unneeded __main__ imports.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Use dict unpacking in idlelib and remove unneeded __main__ imports.