funtypes 0.2.1

FUNctional types for Python. (Backport to 0.2.1)

fntypes

Functional typing in Python!

See examples

See documentation

fntypes is based on the belief that raising exceptions should be avoided. Therefore, it offers a set of functional types needed to write better code. This type strategy grants your project with higher control over type system - improves control flow

Contributions are welcome

@unwrapping
def send_funds(
    sender_id: int, 
    receiver_id: int, 
    amount: decimal.Decimal,
) -> Result[TransactionID, str]:
    sender = get_user(sender_id).expect("Sender is undefined")
    receiver = get_user(receiver_id).expect("Receiver is undefined")
    if sender.get_balance().unwrap() < amount:
        return Error("Sender has not enough funds to complete transaction")
    
    return Ok(
        create_transaction(sender, receiver, amount)
        .unwrap()
        .transaction_id
    )