Decorators & Context Managers

import time, functools

def timed(fn):
    @functools.wraps(fn)
    def wrapper(*a, **kw):
        t = time.perf_counter()
        out = fn(*a, **kw)
        print(f"{fn.__name__}: {time.perf_counter()-t:.3f}s")
        return out
    return wrapper

@functools.lru_cache(maxsize=None)
def embed(text): ...

with open("data.txt") as f:
    lines = f.readlines()