python实现在pandas.DataFrame添加一行

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