api.py

from urllib.parse import quote_plus, urlencode
import requests
from urllib.request import urlopen, Request

session = requests.Session

url = 'http://apis.data.go.kr/1160100/service/GetStocDiviInfoService/getDiviInfo'
queryParams = '?' + urlencode({
    quote_plus('ServiceKey') : 'gJzlDCS7IS9dZXyGkrtszUr0x5BophBoSedp7A6TEATYpeG9rzLVB8sOyNKf8kRUWl7cc50has2ogGw9KWGICw%3D%3D',
    quote_plus('pageNo') : '1',
    quote_plus('numOfRows') : '10',
    quote_plus('resultType') : 'xml',
    quote_plus('basDt') : '',
    quote_plus('crno') : '1101110057012',
    quote_plus('stckIssuCmpyNm') : '동남합성'
})

req = Request(url + queryParams)
req.get_method = lambda: 'GET'
response_body = urlopen(req).read().decode('utf-8')
print(response_body)