pandas isnull sum与列标题

试试这个:

In [71]: df
Out[71]:
     a    b  c
0  NaN  7.0  0
1  0.0  NaN  4
2  2.0  NaN  4
3  1.0  7.0  0
4  1.0  3.0  9
5  7.0  4.0  9
6  2.0  6.0  9
7  9.0  6.0  4
8  3.0  0.0  9
9  9.0  0.0  1

In [72]: pd.isnull(df).sum()
Out[72]:
a    1
b    2
c    0
dtype: int64

要么:

In [76]: df.isnull().sum()
Out[76]:
a    1
b    2
c    0
dtype: int64

你可以用它创建一个DF:

In [78]: df.isnull().sum().to_frame('nulls')
Out[78]:
   nulls
a      1
b      2
c      0