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class Logger: def log(self, msg): print(f"[LOG] {msg}") class TimestampLogger(Logger): def log(self, msg): from datetime import datetime ts = datetime.now().strftime("%H:%M:%S") super().log(f"{ts} - {msg}") class PrefixLogger(TimestampLogger): def __init__(self, prefix): self.prefix = prefix def log(self, msg): super().log(f"[{self.prefix}] {msg}") pl = PrefixLogger("APP") pl.log("Server started") pl.log("User logged in")
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