print 输出直接到文件里
主要是python版本问题，语法不一样，这里记录一下。
python 3.x
#!/usr/bin/env python3
#coding:utf-8
K = 10
f = open("./output/recard", 'w+')
for i in range(K)
print("第{0}条数据".format(i), file=f)
python 2.x
#!/usr/bin/env python3
#coding:utf-8
K = 10
f = open("./output/recard", 'w+')
for i in range(K)
print>>f,"第{0}条数据".format(i) 