输入数据如下：
id season city date team1 team2 toss_winner toss_decision result dl_applied winner win_by_runs win_by_wickets player_of_match venue umpire1 umpire2 umpire3
1 2017 Hyderabad 2017-04-05 Sunrisers Hyderabad Royal Challengers Bangalore Royal Challengers Bangalore field normal 0 Sunrisers Hyderabad 35 0 Yuvraj Singh Rajiv Gandhi International Stadium, Uppal AY Dandekar NJ Llong
2 2017 Pune 2017-04-06 Mumbai Indians Rising Pune Supergiant Rising Pune Supergiant field normal 0 Rising Pune Supergiant 0 7 SPD Smith Maharashtra Cricket Association Stadium A Nand Kishore S Ravi
3 2017 Rajkot 2017-04-07 Gujarat Lions Kolkata Knight Riders Kolkata Knight Riders field normal 0 Kolkata Knight Riders 0 10 CA Lynn Saurashtra Cricket Association Stadium Nitin Menon CK Nandan
4 2017 Indore 2017-04-08 Rising Pune Supergiant Kings XI Punjab Kings XI Punjab field normal 0 Kings XI Punjab 0 6 GJ Maxwell Holkar Cricket Stadium AK Chaudhary C Shamshuddin
5 2017 Bangalore 2017-04-08 Royal Challengers Bangalore Delhi Daredevils Royal Challengers Bangalore bat normal 0 Royal Challengers Bangalore 15 0 KM Jadhav M Chinnaswamy Stadium
6 2017 Hyderabad 2017-04-09 Gujarat Lions Sunrisers Hyderabad Sunrisers Hyderabad field normal 0 Sunrisers Hyderabad 0 9 Rashid Khan Rajiv Gandhi International Stadium, Uppal A Deshmukh NJ Llong
7 2017 Mumbai 2017-04-09 Kolkata Knight Riders Mumbai Indians Mumbai Indians field normal 0 Mumbai Indians 0 4 N Rana Wankhede Stadium Nitin Menon CK Nandan
8 2017 Indore 2017-04-10 Royal Challengers Bangalore Kings XI Punjab Royal Challengers Bangalore bat normal 0 Kings XI Punjab 0 8 AR Patel Holkar Cricket Stadium AK Chaudhary C Shamshuddin
9 2017 Pune 2017-04-11 Delhi Daredevils Rising Pune Supergiant Rising Pune Supergiant field normal 0 Delhi Daredevils 97 0 SV Samson Maharashtra Cricket Association Stadium AY Dandekar S Ravi
10 2017 Mumbai 2017-04-12 Sunrisers Hyderabad Mumbai Indians Mumbai Indians field normal 0 Mumbai Indians 0 4 JJ Bumrah Wankhede Stadium Nitin Menon CK Nandan
11 2017 Kolkata 2017-04-13 Kings XI Punjab Kolkata Knight Riders Kolkata Knight Riders field normal 0 Kolkata Knight Riders 0 8 SP Narine Eden Gardens A Deshmukh NJ Llong
12 2017 Bangalore 2017-04-14 Royal Challengers Bangalore Mumbai Indians Mumbai Indians field normal 0 Mumbai Indians 0 4 KA Pollard M Chinnaswamy Stadium KN Ananthapadmanabhan AK Chaudhary
13 2017 Rajkot 2017-04-14 Rising Pune Supergiant Gujarat Lions Gujarat Lions field normal 0 Gujarat Lions 0 7 AJ Tye Saurashtra Cricket Association Stadium A Nand Kishore S Ravi
14 2017 Kolkata 2017-04-15 Kolkata Knight Riders Sunrisers Hyderabad Sunrisers Hyderabad field normal 0 Kolkata Knight Riders 17 0 RV Uthappa Eden Gardens AY Dandekar NJ Llong
15 2017 Delhi 2017-04-15 Delhi Daredevils Kings XI Punjab Delhi Daredevils bat normal 0 Delhi Daredevils 51 0 CJ Anderson Feroz Shah Kotla YC Barde Nitin Menon
以下是数据帧的默认输出：
>>> df
id season city date team1 ... player_of_match venue umpire1 umpire2 umpire3
0 1 2017 Hyderabad 2017-04-05 Sunrisers Hyderabad ... Yuvraj Singh Rajiv Gandhi International Stadium, Uppal AY Dandekar NJ Llong NaN
1 2 2017 Pune 2017-04-06 Mumbai Indians ... SPD Smith Maharashtra Cricket Association Stadium A Nand Kishore S Ravi NaN
2 3 2017 Rajkot 2017-04-07 Gujarat Lions ... CA Lynn Saurashtra Cricket Association Stadium Nitin Menon CK Nandan NaN
3 4 2017 Indore 2017-04-08 Rising Pune Supergiant ... GJ Maxwell Holkar Cricket Stadium AK Chaudhary C Shamshuddin NaN
4 5 2017 Bangalore 2017-04-08 Royal Challengers Bangalore ... KM Jadhav M Chinnaswamy Stadium NaN NaN NaN
.. ... ... ... ... ... ... ... ... ... ... ...
631 632 2016 Raipur 2016-05-22 Delhi Daredevils ... V Kohli Shaheed Veer Narayan Singh International Stadium A Nand Kishore BNJ Oxenford NaN
632 633 2016 Bangalore 2016-05-24 Gujarat Lions ... AB de Villiers M Chinnaswamy Stadium AK Chaudhary HDPK Dharmasena NaN
633 634 2016 Delhi 2016-05-25 Sunrisers Hyderabad ... MC Henriques Feroz Shah Kotla M Erasmus C Shamshuddin NaN
634 635 2016 Delhi 2016-05-27 Gujarat Lions ... DA Warner Feroz Shah Kotla M Erasmus CK Nandan NaN
635 636 2016 Bangalore 2016-05-29 Sunrisers Hyderabad ... BCJ Cutting M Chinnaswamy Stadium HDPK Dharmasena BNJ Oxenford NaN
通过点击python pandas命令：
df.groupby（['season'，'toss_winner']）['toss_winner']。count（）
输出：
season toss_winner
2008 Chennai Super Kings 5
Deccan Chargers 9
Delhi Daredevils 6
Kings XI Punjab 8
Kolkata Knight Riders 6
..
2017 Kolkata Knight Riders 9
Mumbai Indians 11
Rising Pune Supergiant 6
Royal Challengers Bangalore 9
Sunrisers Hyderabad 5
Name: toss_winner, Length: 84, dtype: int64
但是我只想将此系列转换为计数最高的数据框。例如，2017年最高的是孟买印第安人
我需要如下输出：
season toss_winner
2008 Deccan Chargers 9
..
2017 Mumbai Indians 11
任何人都可以帮助完成此命令吗？
答案 0 :(得分：1)
使用：
df.groupby('season').agg(mode=('toss_winner',lambda x: x.mode()))
或：
df_count=df.groupby(['season','toss_winner'])['toss_winner'].count().rename('count').reset_index()
df_count_mode=df_count[df_count['count'].eq(df_count['count'].max())]
print(df_count_mode)
season toss_winner count
4 2017 Mumbai_Indians 3
答案 1 :(得分：0)
您可以使用.transform(max)
尝试一下：
df = df.groupby(['season','toss_winner'])['toss_winner'].count().reset_index(name='count')
result_df = df[df['count'] == df.groupby(['season'])['count'].transform(max)]
参考：
Get the Row(s) which have the max value in groups using groupby