Python module for parsing and writing BAI2 Files
The library is not production ready at the moment as we don’t have enough data to test against, please help us improve it.
Only Python 2.7 and Python 3.3+ are supported.
pip install bai2
To use bai2 in a project
>>> from bai2 import bai2 >>> # parse from a file >>> with open(<file-path>) as f: >>> bai2_file = bai2.parse_from_file(f) >>> # parse from a string >>> bai2_file = bai2.parse_from_string(<bai2_as_string>) >>> # parse from lines >>> bai2_file = bai2.parse_from_lines(<bai2_as_lines>)
The parse_from_* methods return a bai2.models.Bai2File object which can be used to inspect the parsed data.
To write a BAI2 file:
>>> from bai2 import bai2 >>> from bai2 import models >>> bai2_file = models.Bai2File() >>> bai2_file.header.sender_id = 'EGBANK' >>> bai2_file.children.append(models.Group()) >>> transactions = [models.TransactionDetail(amount=100)] >>> bai2_file.children.children.append(models.Account(children=transactions)) >>> # write to string >>> output = bai2.write(bai2_file)
Bai2File Bai2FileHeader Group GroupHeader Account AccountIdentifier TransactionDetail AccountTrailer GroupTrailer Bai2FileTrailer
Section models define a header, a trailer and a list of children whilst single models define properties matching the bai2 fields.
Each Model has a rows property with the original rows from the BAI2 file.
The parse method might raise 3 exceptions:
- ParsingException: when the file contains an error and the library can’t interpret the data
- NotSupportedYetException: when the library doesn’t support the feature yet
- IntegrityException: when the control totals or the number of objects reported in the trailers don’t match the ones in the file.
We’ve noticed that different banks implement the specs in slightly different ways and the parse method might therefore raise an ParsingException. It is expected to work correctly with files produced by NatWest, RBS, and JP Morgan.
We don’t know yet how to deal with these cases as we don’t have access to many bai2 files so we can’t test it as we would like.
Please let me know if this happens to you.
Copyright © 2015 HM Government (Ministry of Justice Digital Services). See LICENSE for further details.
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