python 几种读取文件方法

obj = open("C:\\Users\c\Desktop\Atest.py","r",encoding='UTF-8') #被读文件总含中文需加
strings = obj.readline()
print(strings)
position = obj.tell()
print(position)
print("-----------------------------------")
obj.seek(0,0)   #返回第一行第一字符
while True:
strings = obj.readline()
if strings == '':#用 ''来判断文件尾
break

line = of.readline()
while line != '':
print(line)
line = of.readline()

outfi = open('C:/Users/c/Desktop/Atest.ttt','w')for line in open('C:/Users/c/Desktop/Atest.py','r',encoding='UTF-8'):    outfi.write(line)    outfi.flush()    print(line)