koranth...@gmail.com wrote:
Module database:
^^^^^^^^^^^^^^^^^^^
Session = None
'Initializing' names is not necessary. Delete this. Without it, your
error would be more obvious.
def init(dbname):
engine = create_engine('sqlite:///%s' %dbname)
...
global Session
Session = sessionmaker(bind=engine)
This **rebinds* the module name 'Session' to a new object, making the
initial bindin irrelevant and misleading.
[snip]
I guessed as much. But, I was under the impression that if the
original value is modified, the variables value also will change.
Python has names and slots bound to objects. Some objects are mutable
and some not. None is not mutable. You replaced it.
If you had done something like
Session = sessionmaker()
def init(dbname):
Session.engine = create_engine('sqlite:///%s' %dbname)
...
then you would have *modified* the original object (value) bound to
'Session' and would have seen the behavior you expected.
Terry Jan Reedy
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