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[英]How to create nested array of array inside a pandas dataframe column
[英]How to create column inside a column in a pandas dataframe?
以下是用于创建 DataFrame 的代码。
import pandas as pd
cols = ['Col 1', 'Col 2', 'Col 3']
data = [['Row 1', '1.0', '{"tag1" : {0: \" \", 1: \" \"}, "tag2": {2: \" \", 3: \" \"}}'], ['Row 2', '2.0', '{"tag1" : {0: \" \", 1: \" \"}, "tag2": {2: \" \", 3: \" \"}}']]
df = pd.DataFrame(columns = cols, data = data)
下面是 DataFrame df
的 output
Col 1 Col 2 Col 3
0 Row 1 1.0 {"tag1" : {0: " ", 1: " "}, "tag2": {2: " ", 3: " "}}
1 Row 2 2.0 {"tag1" : {0: " ", 1: " "}, "tag2": {2: " ", 3: " "}}
如何将上述 DataFrame 转换为如下所示的任何表格格式?
您可以使用eval
创建每一列,将string
转换为dictionary
,然后访问所需的值,例如col 0
:
df[0] = df['Col 3'].apply(lambda x: eval(x)['tag1'][0])
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