import sys
import time


class timed_import:
    """Context manager for timing imports."""

    def __init__(self, name):
        self.name = name
        self.start = None

    def __enter__(self):
        sys.stdout.write(f"{self.name} ")
        sys.stdout.flush()
        self.start = time.time()
        return self

    def __exit__(self, *args):
        elapsed = time.time() - self.start
        sys.stdout.write(f"in {elapsed:.1f}s\n")
        sys.stdout.flush()