from enum import Enum
from typing import Optional

class LaunchMode(Enum):
    WINDOW = "new_window"
    TAB = "new_tab"

    @classmethod
    def from_name(cls, name: str) -> Optional["LaunchMode"]:
        for member in cls:
            if member.name == name:
                return member
        return None

    @classmethod
    def from_value(cls, value: str) -> Optional["LaunchMode"]:
        try:
            return cls(value)
        except ValueError:
            return None


print(LaunchMode.from_name("TAB"))
print(LaunchMode.from_name("random"))

print(LaunchMode.from_value("new_window"))
print(LaunchMode.from_value("random"))