request_oab.py

import requests


data = {
    'pagina': '0',
    'tipo_consulta': '0',
    'nr_inscricao': '123123',
    'cbxadv': '1',
    'id_tipoinscricao': '1',
    'nome_advogado': '',
    'parte_nome': '1',
    'nr_cpf': '',
    'idCidade': '0',
}

params = []
for key, value in data.items():
    params.append('='.join((key, value)))

response = requests.post(
    'https://www2.oabsp.org.br/asp/consultaInscritos/consulta_nr_advogado.asp',
    headers={
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36', 
        'Referer': 'https://www2.oabsp.org.br/asp/consultaInscritos/consulta01.asp', 
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    },
    data='&'.join(params),
)
print(response.text)