Could you post an example on how to extract the BIC from the IBAN number in belgium? Is thi BIC part of the IBAN?
In spain the BIC is not part of the IBAN but there is a national bank code which is part of the IBAN. The BIC can be deducted from the Bank code.
In some countries (at least in Belgium), it is possible to extract the BIC from the IBAN number. So we could have a check that ensure such number is linked to the bank.
Normally, the same could be done for French bank but python-stdnum does not have yet the methods.