f = open('data', 'r', encoding='utf-8')
print(f.tell())
print(f.readline())
print(f.tell())
print(f.readline())
seek默认相对于开始位置
f = open('data', 'r', encoding='utf-8')
f.seek(3)
print(f.read())
seek(num, 1)相对于上次的光标位置,需要用二进制进行操作
f = open('data', 'rb')
f.seek(6)
print(f.tell()) # 6
f.seek(3, 1)
print(f.tell()) # 9
seek(num, 2)从文件末尾开始读
f = open('data', 'rb')
f.seek(-3, 2)
print(f.read())
使用seek读取文件的最后一行,思路读取最后两行,再取最后一行
f = open('data', 'rb')
offs = -10
while 1:
f.seek(offs, 2)
data = f.readlines()
if len(data) > 1:
print(data[1].decode())
break
offs*=2