from typing import Dict, Union
from urllib.response import addinfourl

# Stubs for urllib.error

class URLError(IOError):
    reason: Union[str, BaseException]
class HTTPError(URLError, addinfourl):
    code: int
    headers: Dict[str, str]
    def __init__(self, url, code, msg, hdrs, fp) -> None: ...
class ContentTooShortError(URLError): ...