Python - 向 Pandas DataFrame 添加零列
pythonserver side programmingprogramming更新于 2025/11/9 12:28:17
要向 Pandas DataFrame 添加零列，请使用方括号并将其设置为 0。首先，导入所需的库 −
import pandas as pd
创建一个包含 3 列的 DataFrame −
dataFrame = pd.DataFrame(
{
"Student": ['Jack', 'Robin', 'Ted', 'Marc', 'Scarlett', 'Kat', 'John'],"Result": ['Pass', 'Fail', 'Pass', 'Fail', 'Pass', 'Pass', 'Pass'],"Roll Number": [ 5, 10, 3, 8, 2, 9, 6]
}
)
创建一个包含零个条目的新列 −
dataFrame['ZeroColumn'] = 0
示例
以下是代码 −
import pandas as pd
# 创建 DataFrame
dataFrame = pd.DataFrame(
{
"Student": ['Jack', 'Robin', 'Ted', 'Marc', 'Scarlett', 'Kat', 'John'],"Result": ['Pass', 'Fail', 'Pass', 'Fail', 'Pass', 'Pass', 'Pass'],"Roll Number": [ 5, 10, 3, 8, 2, 9, 6]
}
)
print"DataFrame ...\n",dataFrame
dataFrame['ZeroColumn'] = 0
print"\nUpdated DataFrame ...\n",dataFrame
输出
这将产生以下输出 −
DataFrame ... Result Roll Number Student 0 Pass 5 Jack 1 Fail 10 Robin 2 Pass 3 Ted 3 Fail 8 Marc 4 Pass 2 Scarlett 5 Pass 9 Kat 6 Pass 6 John Updated DataFrame ... Result Roll Number Student ZeroColumn 0 Pass 5 Jack 0 1 Fail 10 Robin 0 2 Pass 3 Ted 0 3 Fail 8 Marc 0 4 Pass 2 Scarlett 0 5 Pass 9 Kat 0 6 Pass 6 John 0
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有用资源
python 参考教程 - 该教程包含有关 python 的更多信息:https://www.cainiaomax.com/python/
