问为什么这是Python中意想不到的缩进？

EN

#!/usr/bin/python

try:
    f = open("/home/masi/r.raw", "r+")
    aBuf = f.seek(4) 
except:
    print "Error at position : ", position

events = []
for i in range(100):
    aBuf = f.seek(4);

    try:
        if aBuf[:4] == b'\xFA\xFA\xFA\xFA':
            print("E")

    except:
    #   print "\0"

f.close()

    f.close()
    ^
IndentationError: expected an indented block