df.explode() 函数在 python 中不起作用

Question

我遇到了一个奇怪的问题，我在数据框中有一个列名 'window'，它有一个值列表，即 [3,9,45,78]。我正在尝试使用 df.explode('window') 展开此列，但这没有任何作用。 'window' 列的数据类型是对象。我检查了我的 pandas 版本 - 1.3.4

dataframe example

Answer 1

请记住，df.explode 并没有就地完成它的工作。它 RETURNS 一个新的数据框，其中包含以下更改：

import pandas as pd

data = [
    [ 0, [1,2,3], [4,5,6], 7 ],
    [ 0, [1,2,3], [4,5,6], 7 ],
    [ 0, [1,2,3], [4,5,6], 7 ],
    [ 0, [1,2,3], [4,5,6], 7 ],
    [ 0, [1,2,3], [4,5,6], 7 ]
]

df = pd.DataFrame( data, columns=['one', 'two','three','four'] )
print(df)
df2 = df.explode('two')
print(df2)

输出：

   one        two      three  four
0    0  [1, 2, 3]  [4, 5, 6]     7
1    0  [1, 2, 3]  [4, 5, 6]     7
2    0  [1, 2, 3]  [4, 5, 6]     7
3    0  [1, 2, 3]  [4, 5, 6]     7
4    0  [1, 2, 3]  [4, 5, 6]     7
   one two      three  four
0    0   1  [4, 5, 6]     7
0    0   2  [4, 5, 6]     7
0    0   3  [4, 5, 6]     7
1    0   1  [4, 5, 6]     7
1    0   2  [4, 5, 6]     7
1    0   3  [4, 5, 6]     7
2    0   1  [4, 5, 6]     7
2    0   2  [4, 5, 6]     7
2    0   3  [4, 5, 6]     7
3    0   1  [4, 5, 6]     7
3    0   2  [4, 5, 6]     7
3    0   3  [4, 5, 6]     7
4    0   1  [4, 5, 6]     7
4    0   2  [4, 5, 6]     7
4    0   3  [4, 5, 6]     7

df.explode() 函数在 python 中不起作用

df.explode() function not working in python

python

pandas

dataframe

explode