from typing import Callable, TypeVar

T = TypeVar("T")

def pipe(value: T, *functions: Callable) -> T:
    """מריץ pipeline של transformations."""
    result = value
    for func in functions:
        result = func(result)
    return result

# Pipeline לטיפול בdata ממשתמש
def validate_required(data: dict) -> dict:
    required = ["email", "name"]
    missing = [f for f in required if not data.get(f)]
    if missing:
        raise ValueError(f"Missing fields: {missing}")
    return data

def normalize_email(data: dict) -> dict:
    return {**data, "email": data["email"].strip().lower()}

def normalize_name(data: dict) -> dict:
    name = " ".join(data["name"].strip().split())
    return {**data, "name": name}

def add_defaults(data: dict) -> dict:
    return {"is_active": True, "role": "user", **data}

# שימוש - כל שלב עושה דבר אחד
raw_input = {"email": "  DANA@GMAIL.COM  ", "name": "  Dana   Cohen  "}

processed = pipe(
    raw_input,
    validate_required,
    normalize_email,
    normalize_name,
    add_defaults,
)

# {"email": "dana@gmail.com", "name": "Dana Cohen", "is_active": True, "role": "user"}
Functional Python — lambda, map, filter, functools

Functional Python — lambda, map, filter, functools
