findcep_search_cep.py

#!/usr/bin/env python
import requests

def validate_field(field):
    cep = "".join(field.replace("-"," ").split())
    if cep.isdigit() and len(cep) == 8:
       return cep
    raise Exception('CEP "{field}" Format Invalid'.format(field=field))

CEP_SEARCH = validate_field('01001001')
API_CEP_BASE_URL = 'https://api.findcep.com/v1/cep/{cep}.json'
headers = {'Referer': 'https://your-site.com'}

cep_request = requests.get(API_CEP_BASE_URL.format(cep=CEP_SEARCH) , headers=headers)

print(cep_request.json())