Handelsregister number length

The minimum length for German trade register numbers should be 1, so the regex should look like:

_number_re = r'(?P<nr>[1-9][0-9]{0,5})(\s*(?P<x>[A-Z]{2}))?'

Furthermore, you can assume that the first number can't be a 0.

I would also adjust the suffix length which can be of length 2 only. I looked through all register numbers and found only the one's with length 2. You can access all data here: https://offeneregister.de/

Here is a count

Counter({'FL': 25271,
         'HU': 4880,
         'SL': 3288,
         'NI': 4299,
         'PI': 22153,
         'EL': 4753,
         'ME': 5285,
         'IZ': 5327,
         'NM': 4887,
         'KI': 36513,
         'NO': 6705,
         'PL': 3391,
         'RD': 5495,
         'HL': 31010,
         'OL': 3159,
         'OD': 2096,
         'RE': 4481,
         'GE': 1392,
         'BS': 2929,
         'RZ': 1160,
         'SB': 2937,
         'AH': 5515,
         'KA': 1425,
         'SE': 3438,
         'EC': 2720,
         'BB': 2227,
         'EU': 2138,
         'MÖ': 1219})

Here are some examples for numbers with length 1:

https://expertoshop.de/impressum/ (München HRB 1)

https://www.vreg-immo.de/impressum.xhtml (Pinneberg GNR 1 IZ) From the register data:

{'_registerArt': 'HRA', '_registerNummer': '1', 'federal_state': 'Bavaria', 'registered_office': 'Augsburg', 'registrar': 'Augsburg', 'native_company_number': 'Augsburg HRA 1'}
{'_registerArt': 'HRB', '_registerNummer': '1', 'federal_state': 'North Rhine-Westphalia', 'registered_office': 'Bochum', 'registrar': 'Bochum', 'native_company_number': 'Bochum HRB 1'}
{'_registerArt': 'PR', '_registerNummer': '1', 'federal_state': 'Bavaria', 'registered_office': 'Krumbach', 'registrar': 'Memmingen', 'native_company_number': 'Memmingen PR 1'}
{'_registerArt': 'HRB', '_registerNummer': '9', 'federal_state': 'North Rhine-Westphalia', 'registered_office': 'Höxter-Godelheim', 'registrar': 'Paderborn', 'native_company_number': 'Paderborn früher Höxter HRB 9'}
{'_registerArt': 'GnR', '_registerNummer': '1', 'federal_state': 'Bavaria', 'registered_office': 'Bad Reichenhall', 'registrar': 'Traunstein', 'native_company_number': 'Traunstein GnR 1'}
{'_registerArt': 'PR', '_registerNummer': '8', 'federal_state': 'Bavaria', 'registered_office': 'Straubing', 'registrar': 'Straubing', 'native_company_number': 'Straubing PR 8'}
[...]

Distribution of number lengths:

Counter({6: 1299503, 5: 1819592, 3: 354028, 4: 1793487, 2: 35271, 1: 3846})

Let me know if you need additional resources.

arthurdejong / python-stdnum

Handelsregister number length #143