f = open('/tmp/workfile', 'r+')
f.write('0123456789abcdef')
f.seek(5)     # Go to the 6th byte in the file
f.read(1)
f.seek(-3, 2) # Go to the 3rd byte before the end
f.read(1)
f.readline()
f.close()
		

for line in open("myfile.txt"):
    print line

with open("myfile.txt") as f:
    for line in f:
        print line
		

with open('beak', 'rb+') as f:
    content = f.read()
    f.seek(0)
    f.write(content.replace(b'\r', b''))
    f.truncate()		
		

原文出处：Netkiller 系列 手札
本文作者：陈景峯
转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。