动态:pandas dataframe drop函数介绍
来源:脚本之家    时间:2022-09-14 18:48:45


(相关资料图)

使用drop函数删除dataframe的某列或某行数据:

drop(labels, axis=0, level=None, inplace=False, errors="raise")
         --  axis为0时表示删除行,axis为1时表示删除列

常用参数如下:

import pandas as pd
import numpy as np
 
data = {"Country":["China","US","Japan","EU","UK/Australia", "UK/Netherland"],
"Number":[100, 150, 120, 90, 30, 2],
"Value": [1, 2, 3, 4, 5, 6],
"label": list("abcdef")}
 
df = pd.DataFrame(data)
print("df原数据:\n", df, "\n")
out:
df原数据:
          Country  Number  Value label
0          China     100      1     a
1             US     150      2     b
2          Japan     120      3     c
3             EU      90      4     d
4   UK/Australia      30      5     e
5  UK/Netherland       2      6     f

删除单列:

print(df.drop("Country", axis = 1))
 
out:
   Number  Value label
0     100      1     a
1     150      2     b
2     120      3     c
3      90      4     d
4      30      5     e
5       2      6     f

删除多列:

print(df.drop(["Country","Number"], axis = 1))
 
out:
   Value label
0      1     a
1      2     b
2      3     c
3      4     d
4      5     e
5      6     f

删除单行:

print(df.drop(labels = 1, axis = 0))
 
out:
         Country  Number  Value label
0          China     100      1     a
2          Japan     120      3     c
3             EU      90      4     d
4   UK/Australia      30      5     e
5  UK/Netherland       2      6     f

删除多行:

print(df.drop(labels = [1,2], axis = 0))
 
out:
         Country  Number  Value label
0          China     100      1     a
3             EU      90      4     d
4   UK/Australia      30      5     e
5  UK/Netherland       2      6     f

使用range函数删除连续多行:

print(df.drop(labels = range(1,3), axis = 0))
 
out:
         Country  Number  Value label
0          China     100      1     a
3             EU      90      4     d
4   UK/Australia      30      5     e
5  UK/Netherland       2      6     f

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