[ZODB-Dev] 'None' transaction ids?

[Chris Withers]

Toby Dickenson wrote:
> 
> Ive seen something similar before where TmpStorage (the store used in
> subtransactions) wasnt expecting None as a transaction id. In that
> case the None was generated as part of an import from a .zexp file. Im
> not sure if that relevant to you, but it might be a clue.

What generates transaction ids?

There's a lot of transactions in this Data.fs that have been generated by me
calling get_transaction().begin() and get_transaction.commit() in a python
script, could this result in 'None' transaction ids?

cheers,

Chris