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摘要： import winsound frequency = 37 while frequency<32768: winsound.Beep(frequency,100) print(frequency) frequency += 100 阅读全文

摘要： f = open('a.txt', 'w+') data = f.read() data = f.readline() w、w+、wb、wb+ 模式都会默认清空文件 file = open("0.txt",'w') file.close() 打开后文件指针在开头，即使不执行写操作，也会清空原内容 阅读全文