Please add example data.sta file

Thanks for the quick hack. Does a good job.

my only issue is with the field 86 subtags: they actually allow any character to be used as payload, and having a ":" in a custom bank statement communication happens often, but that breaks your field detection regexp.

Could you please update your script to allow ':' in the 86 payload ? eg:

:86:020?00Authen. PSD2 : M
?20FRANK D : Rechnung 2020-11
?21/EREF/WB0H230590006489/
?30BGLLLULL
?31LU3900390039003900
?60Compte Optiflex

I got error:
...mt940.py", line 39, in
match_dict = match.groupdict()
AttributeError: 'NoneType' object has no attribute 'groupdict'

When I solve than I got error:
...mt940-1.py", line 54, in
date = match_dict['valuta']
NameError: name 'match_dict' is not defined

It looks like there is missing definition of match_dict for field 86.