之前全是有关于添加操作，现在如果要删除一行或者一列呢，可以使用drop方法。
obj = Series(np.arange(5.), index=['a', 'b', 'c', 'd', 'e'])

a    0.0
b    1.0
c    2.0
d    3.0
e    4.0

obj2=obj.drop('c')

a    0.0
b    1.0
d    3.0
e    4.0

对于DataFrame，可以从任何坐标轴删除索引值：
data = DataFrame(np.arange(16).reshape((4, 4)),index=['Ohio', 'Colorado', 'Utah', 'New York'],columns=['one', 'two', 'three', 'four'])

          one  two  three  four
Ohio        0    1      2     3
Colorado    4    5      6     7
Utah        8    9     10    11
New York   12   13     14    15

data.drop(['Colorado', 'Ohio'])

          one  two  three  four
Utah        8    9     10    11
New York   12   13     14    15

data.drop('two', axis=1)

          one  three  four
Ohio        0      2     3
Colorado    4      6     7
Utah        8     10    11
New York   12     14    15

axis=1表示是对列进行操作，axis=0表示是对行
data.drop(['two', 'four'], axis=1)

          one  three
Ohio        0      2
Colorado    4      6
Utah        8     10
New York   12     14