Terry J. Reedy <tjre...@udel.edu> added the comment:
To me, the failure of dir() in message 1 is surprising and possibly a bug. I
always though of a module globals = locals = dict() instance as continuous
across statements, whether in batch or interactive move. In batch mode
import sys
mod = sys.modules[__name__]
sys.modules[__name__]
print(dir())
works. Adding '-i' to the command line is supposed to allow one to enter
interactive statements to be executed in the same namespace.
In IDLE's Shell, dir() in msg 1 executes normally. This is because
idlelib.run.Executive() initializes the instance by caching globals().
self.locals = __main__.__dict__
Then self.runcode(self, code) executes user statements with
exec(code, self.locals)
With exec in the old statement form of 'exec code in self.locals', this pair
predates the first patch git has access to, on 5/26/2002 (GvR, committed by
Chui Tey).
Could and should, python do similarly, and keep a reference to the module
namespace? What did Python do in 2002? What do other implementations and
simulated Shells do now?
----------
nosy: +terry.reedy
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<https://bugs.python.org/issue36665>
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