#f = open("yesterday2.py",'r+',encoding="utf-8",) #文件句柄 读写 #f = open("yesterday2.py",'w+',encoding="utf-8",) #文件句柄pr 写读 #f = open("yesterday2.py",'a+',encoding="utf-8",) #文件句柄pr 追加 f = open("yesterday2.py",'rb') #文件句柄pr 二进制文件 print(f.readline()) print(f.readline()) print(f.readline())