Emanuele D'Arrigo schrieb:
Greetings everybody,
I don't quite understand why if I do this:
d = {}
exec("dir()", d)
1) d is no longer empty
2) the content of d now looks like __builtins__.__dict__ but isn't
quite it d == __builtins__.__dict__ returns false.
Can anybody shed some light?
RTFM helps ;) http://docs.python.org/reference/simple_stmts.html#exec
As a side effect, an implementation may insert additional keys into the
dictionaries given besides those corresponding to variable names set by
the executed code. For example, the current implementation may add a
reference to the dictionary of the built-in module __builtin__ under the
key __builtins__ (!).
Christian
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