Python 熊猫在数据帧之间交换行
我有篮球队,每个队都在一个数据框中。我想交换球员。球员的顺序很重要,所以如果一名球员从第二个位置出来,我希望他能进入同一个位置Python 熊猫在数据帧之间交换行,python,pandas,dataframe,Python,Pandas,Dataframe,我有篮球队,每个队都在一个数据框中。我想交换球员。球员的顺序很重要,所以如果一名球员从第二个位置出来,我希望他能进入同一个位置 import pandas as pd data = {'Name': [ 'Dwight_Howard ', 'Kobe_Bryant', 'Jameer_Nelson', 'Trevor_Ariza', 'Dirk_Nowitzki','Jordan_Hill', 'Eric_Gordon', 'Jeremy_Lin', 'Chandler_Parsons', '
import pandas as pd
data = {'Name': [ 'Dwight_Howard ', 'Kobe_Bryant', 'Jameer_Nelson', 'Trevor_Ariza', 'Dirk_Nowitzki','Jordan_Hill', 'Eric_Gordon', 'Jeremy_Lin', 'Chandler_Parsons', 'Tim_Duncan'],
'Pos': ['C','G','G','F','F','C','G','G','F','F'],
'Value': [11, 8, 10, 15, 11,14, 7, 12, 13, 8]}
league = pd.DataFrame(data)
team1 = league[0:5:2]
team2 = league[1:6:2]
print team1
print team2
Name Pos Value
0 Dwight_Howard C 11
2 Jameer_Nelson G 10
4 Dirk_Nowitzki F 11
Name Pos Value
1 Kobe_Bryant G 8
3 Trevor_Ariza F 15
5 Jordan_Hill C 14
如果我用霍华德换希尔,我希望球队看起来像这样:
Name Pos Value
5 Jordan_Hill C 14
2 Jameer_Nelson G 10
4 Dirk_Nowitzki F 11
Name Pos Value
1 Kobe_Bryant G 8
3 Trevor_Ariza F 15
0 Dwight_Howard C 11
我的解决方案通过索引标签交换
df
的值,玩家的名字是什么
import pandas as pd
data = {'Name': [ 'Dwight_Howard', 'Kobe_Bryant', 'Jameer_Nelson', 'Trevor_Ariza', 'Dirk_Nowitzki','Jordan_Hill', 'Eric_Gordon', 'Jeremy_Lin', 'Chandler_Parsons', 'Tim_Duncan'],
'Pos': ['C','G','G','F','F','C','G','G','F','F'],
'Value': [11, 8, 10, 15, 11,14, 7, 12, 13, 8]}
player1 = 'Dwight_Howard'
player2 = 'Jordan_Hill'
league = pd.DataFrame(data)
team1 = league[0:5:2]
team2 = league[1:6:2]
print team1
print team2
# Name Pos Value
#0 Dwight_Howard C 11
#2 Jameer_Nelson G 10
#4 Dirk_Nowitzki F 11
# Name Pos Value
#1 Kobe_Bryant G 8
#3 Trevor_Ariza F 15
#5 Jordan_Hill C 14
#set new columns from index and columns name
league['Nameindex'] = league['Name']
league['idx'] = league.index
#set index from column Nameindex
league = league.set_index('Nameindex')
#swap values of dataframes by labels
league.loc[[player1,player2],:] = league.loc[[player2,player1],:].values
#set index from original index
league = league.set_index('idx')
#remove index name
del league.index.name
team1 = league[0:5:2]
team2 = league[1:6:2]
print team1
print team2
# Name Pos Value
#5 Jordan_Hill C 14
#2 Jameer_Nelson G 10
#4 Dirk_Nowitzki F 11
# Name Pos Value
#1 Kobe_Bryant G 8
#3 Trevor_Ariza F 15
#0 Dwight_Howard C 11
感谢@jezrael提供的非常有用的帖子。我能够把它提炼成简单的得到两名联盟球员的指数值,然后在联盟中交换他们。由于球队只是联赛的指针,这就是所有需要做的事情。这是解决办法。再次感谢你的指点
player1 = league[league.Name=='Dwight_Howard'].index.get_values()[0]
player2 = league[league.Name=='Jordan_Hill'].index.get_values()[0]
league.loc[[player1,player2],:] = league.loc[[player2,player1],:].values