Python - 如何从 Pandas DataFrame 中选择一列
要从DataFrame中选择一列，只需使用方括号获取它。在括号中提到要选择的列，就是这样，例如
dataFrame[‘ColumnName’]
首先，导入所需的库-
import pandas as pd
现在，创建一个DataFrame。我们有两列-
dataFrame = pd.DataFrame(
{
"Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'],
"Units": [100, 150, 110, 80, 110, 90]
}
)要仅选择单个列，请使用方括号提及列名称，如下所示。在这里，我们的列名称是“汽车”-
dataFrame ['Car']
示例
以下是代码-
import pandas as pd
#CreateDataFrame
dataFrame = pd.DataFrame(
{
"Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'],
"Units": [100, 150, 110, 80, 110, 90]
}
)
print"DataFrame ...\n",dataFrame
#selectingacolumn
print"\nSelecting and displaying only a single column = \n",dataFrame ['Car']输出结果这将产生以下输出-
DataFrame ...
Car Units
0 BMW 100
1 Lexus 150
2 Audi 110
3 Mustang 80
4 Bentley 110
5 Jaguar 90
Selecting and displaying only a single column =
0 BMW
1 Lexus
2 Audi
3 Mustang
4 Bentley
5 Jaguar
Name: Car, dtype: object