对Pandas DataFrame缺失值的查找与填充示例讲解

temp = data.isnull().any() #列中是否存在空值
print(type(temp))
print(temp)

<class 'pandas.core.series.Series'>
eventid        False
iyear         False
imonth        False
iday         False
approxdate       True
extended       False
resolution       True
...
Length: 135, dtype: bool

colnull=pd.DataFrame(data={'colname': temp.index,'isnulls':temp.values})
#print(colnull.head())
#不存在空值的列名
print(colnull.loc[colnull.isnulls==False,'colname'])

0       eventid
1        iyear
2        imonth
3         iday
...
Name: colname, dtype: object

data[data.nkill.isnull()]

data['doubtterr'].fillna(0, inplace=True)
data['propvalue'].fillna(data['propvalue'].median(),inplace=True)