Python实现打印机状态反馈

class Printer:
    def __init__(self, is_on=False, paper_level=100, ink_level=100):
        self.is_on = is_on
        self.paper_level = paper_level
        self.ink_level = ink_level
    
    def turn_on(self):
        self.is_on = True
        print("Printer is turned on.")
    
    def turn_off(self):
        self.is_on = False
        print("Printer is turned off.")
    
    def print_document(self, document):
        if not self.is_on:
            print("Printer is turned off. Cannot print document.")
            return
        
        if self.paper_level <= 0:
            print("Out of paper. Cannot print document.")
            return
        
        if self.ink_level <= 0:
            print("Out of ink. Cannot print document.")
            return
        
        print("Printing document:", document)
        self.paper_level -= 1
        self.ink_level -= 1
    
    def check_status(self):
        print(f"Printer is on: {self.is_on}")
        print(f"Paper level: {self.paper_level}%")
        print(f"Ink level: {self.ink_level}%")
        

# Usage
printer = Printer()
printer.check_status()
printer.turn_on()
printer.check_status()
printer.print_document("Sample document")
printer.check_status()
printer.print_document("Another document")
printer.turn_off()
printer.check_status()