returns_library_result_container_success_failure_quickstart.py

1from typing import Any
2from returns.result import Result, Success, Failure
3
4def divide(number: int, divisor: int) -> Result[float, str]:
5    if divisor == 0:
6        return Failure('Division by zero')
7    return Success(number / divisor)
8
9# Usage:
10result = divide(10, 2)
11# Success(5.0)
12
13result = divide(10, 0)
14# Failure('Division by zero')
15
16# You can also use railway oriented programming:
17result = divide(10, 2).bind(
18    lambda inner: divide(inner, 2),
19)
20# Success(2.5)