python操作表格添加行

from pandas import *

from random import *

df = DataFrame(columns=('lib', 'qty1', 'qty2'))#生成空的pandas表

for i in range(5):#插入一行<span id="transmark" style="display:none;"></span>

  df.loc[i] = [randint(-1,1) for n in range(3)]

print df