我阅读了CSV文件，将其转换为数据框，然后删除了重复的行，然后，当我将数据框转换为csv时，它为我返回了相同的csv文件，但没有重复行。
这是我的代码：
import pandas as pd
import csv
df = pd.read_csv('output_res.csv')
df.loc[~df.NameOfClass.duplicated(keep='last')]
df.to_csv("test.csv")
这是我的CSV文件：
NameOfClass,LazyClass,ComplexClass,LongParameterList,FeatureEnvy,LongMethod,BlobClass,MessageChain,RefusedBequest,SpaghettiCode,SpeculativeGenerality
com.nirhart.shortrain.MainActivity,NaN,NaN,NaN,NaN,NaN,NaN,1,NaN,NaN,NaN
com.nirhart.shortrain.path.PathParser,NaN,1,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathParser,NaN,1,NaN,1,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathParser,NaN,1,1,1,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathParser,NaN,1,2,1,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathParser,NaN,1,2,1,1,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathPoint,1,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.PathPoint,1,NaN,1,NaN,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.path.TrainPath,NaN,NaN,NaN,1,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.rail.RailActionActivity,NaN,NaN,NaN,1,NaN,NaN,NaN,NaN,NaN,NaN
com.nirhart.shortrain.rail.RailActionActivity,NaN,NaN,NaN,1,1,NaN,NaN,NaN,NaN,NaN
这就是它的返回结果：
,NameOfClass,LazyClass,ComplexClass,LongParameterList,FeatureEnvy,LongMethod,BlobClass,MessageChain,RefusedBequest,SpaghettiCode,SpeculativeGenerality
0,com.nirhart.shortrain.MainActivity,,,,,,,1.0,,,
1,com.nirhart.shortrain.path.PathParser,,1.0,,,,,,,,
2,com.nirhart.shortrain.path.PathParser,,1.0,,1.0,,,,,,
3,com.nirhart.shortrain.path.PathParser,,1.0,1.0,1.0,,,,,,
4,com.nirhart.shortrain.path.PathParser,,1.0,2.0,1.0,,,,,,
5,com.nirhart.shortrain.path.PathParser,,1.0,2.0,1.0,1.0,,,,,
6,com.nirhart.shortrain.path.PathPoint,1.0,,,,,,,,,
7,com.nirhart.shortrain.path.PathPoint,1.0,,1.0,,,,,,,
8,com.nirhart.shortrain.path.TrainPath,,,,1.0,,,,,,
9,com.nirhart.shortrain.rail.RailActionActivity,,,,1.0,,,,,,
10,com.nirhart.shortrain.rail.RailActionActivity,,,,1.0,1.0,,,,,