import re

with open(r'D:\Evolução categorias\sistema_dfe.html', 'r', encoding='utf-8') as f:
    html = f.read()

# Extract page-dre section
m = re.search(r'id="page-dre".*?(?=id="page-fixas")', html, re.DOTALL)
if m:
    print(m.group()[:3000])
else:
    print('NOT FOUND')