from __future__ import annotations
import base64
import re
import uuid
from typing import Any, Iterable, List, Optional, Type, TypeVar, cast
[docs]def short_uuid_str() -> str:
"""This is being used as a condensed uuid."""
return base64.b64encode(uuid.uuid4().bytes[:6]).decode("utf-8")
def _lower_snake_case(s: str):
return s.lower().replace(" ", "_")
[docs]def check_type(obj: Any, type_: Optional[Type[Any]]) -> None:
if not does_type_match(obj, type_):
raise TypeError(f"Expected {type_}, got {type(obj)}")
[docs]def does_type_match(obj: Any, type_: Optional[Type[Any]]) -> bool:
return True if type_ is None else isinstance(obj, type_)
T = TypeVar("T")
[docs]def checked_cast(obj: Any, type_: Optional[Type[T]]) -> T:
check_type(obj, type_)
return cast(T, obj)
[docs]def filter_by_type(objects: Iterable[Any], type_: Optional[Type[T]]) -> List[T]:
return [object_ for object_ in objects if does_type_match(object_, type_)]
[docs]def is_valid_email(email: str) -> bool:
"""
Validate that an email is a valid one
"""
regex = r"[^@]+@[^@]+\.[^@]+"
return bool(re.match(regex, email))
[docs]def check_email(email: str) -> None:
if not is_valid_email(email):
raise ValueError("Invalid email address")