dictionaries as global and local namespace. If the *globals* dictionary is

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

environment where :func:`eval` is called. The return value is the result of

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 with the *globals* and

*locals* in the environment where :func:`eval` is called. Note, *eval()*

does not have access to the :term:`nested scope`\s (non-locals) in the

enclosing environment.

The return value is the result of

the evaluated expression. Syntax errors are reported as exceptions. Example:

>>> x = 1