python读写二进制文件

#!/usr/bin/env python
import os

f1 = open("wxPython4.jpg", "w")
#f1.write(data)

count = os.path.getsize('wxPython.jpg')
data = ""
f = open('wxPython.jpg', 'rb')

while count > 0:
if count < 1024:
data = f.read(count)
count = count - count
else:
data = f.read(1024)
count = count -1024
f1.write(data)

#if count == 0:
#	break
f.close()
f1.close()