data.txt

열기: data.txt
닫기: data.txt

class FileManager:
    def __init__(self, name): self.name=name
    def __enter__(self): print(f'열기: {self.name}'); return self
    def __exit__(self, *args): print(f'닫기: {self.name}')
name=input().strip()
with FileManager(name): pass