bpo-22057: Clarify eval() documentation (GH-8812)
If a globals dictionary without a '__builtins__' key is passed to
eval(), a '__builtins__' key will be inserted to the dictionary:
>>> eval("print('__builtins__' in globals())", {})
True
(As a result of this behavior, we can use the builtins
print() and globals() even if we passed a dictionary without a
'__builtins__' key to eval().)
(cherry picked from commit 225b05548027d55aafb11b65f6a4a2bef2f5196f)
Co-authored-by: Berker Peksag <berker.peksag@gmail.com>diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index f642f59..949a54d 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -434,8 +434,10 @@
The *expression* argument is parsed and evaluated as a Python expression
(technically speaking, a condition list) using the *globals* and *locals*
dictionaries as global and local namespace. If the *globals* dictionary is
- present and lacks '__builtins__', the current globals are copied into *globals*
- before *expression* is parsed. This means that *expression* normally has full
+ present and does not contain a value for the key ``__builtins__``, a
+ reference to the dictionary of the built-in module :mod:`builtins` is
+ inserted under that key before *expression* is parsed.
+ This means that *expression* normally has full
access to the standard :mod:`builtins` module and restricted environments are
propagated. If the *locals* dictionary is omitted it defaults to the *globals*
dictionary. If both dictionaries are omitted, the expression is executed in the