python读取文件内容并获得读取位置

下面的python代码演示了如何读取文件、获取读取指针的位置、从指定的位置开始读取文件

#!/usr/bin/python

# Open a file
fo = open("/tmp/foo.txt", "r+")
str = fo.read(10);
print "Read String is : ", str

# Check current position
position = fo.tell();
print "Current file position : ", position

# Reposition pointer at the beginning once again
position = fo.seek(0, 0);
str = fo.read(10);
print "Again read String is : ", str
# Close opend file
fo.close()