Groupby fillna ffill

df['three'] = df.groupby(['one','two'], sort=False)['three']
                .apply(lambda x: x.ffill().bfill())
print (df)
   one  two  three
0    1    1   10.0
1    1    1   10.0
2    1    1   10.0
3    1    2   20.0
4    1    2   20.0
5    1    2   20.0
6    1    3    NaN
7    1    3    NaN

Source: stackoverflow.com

Groupby fillna ffill

print (df)
   one  two  three
0    1    1   10.0
1    1    1   40.0
2    1    1    NaN
3    1    2    NaN
4    1    2   20.0
5    1    2    NaN
6    1    3    NaN
7    1    3    NaN

df['three'] = df.groupby(['one','two'], sort=False)['three']
                .apply(lambda x: x.fillna(x.mean()))
print (df)
   one  two  three
0    1    1   10.0
1    1    1   40.0
2    1    1   25.0
3    1    2   20.0
4    1    2   20.0
5    1    2   20.0
6    1    3    NaN
7    1    3    NaN

Source: stackoverflow.com

Similar codes

4 votes294 views1 answer
How to loop the length of an array pytoh
Python
0 vote276 views1 answer
Python close database connection
Python
0 vote272 views1 answer
Python mongodump
Python
0 vote226 views1 answer
A chef has a large container full of olive oil. In one night, after he used 252525 quarts of olive oil, 35.9\%35.9%35, point, 9, percent of the full container of olive oil remained. How many quarts of olive oil remained in the container?
Python
25 votes287 views2 answers
Python copy to clipboard command
Python
1 vote283 views1 answer
Find absolut vale in python
Python
0 vote297 views1 answer
Transform image to rgb python
Python
0 vote285 views2 answers
Reload class module python
Python
20 votes271 views1 answer
ParserError: Error tokenizing data. C error: Expected 1 fields in line 87, saw 2
Python
0 vote311 views1 answer
Python get duration of wav file
Python