Python Pandas - 通过从基于索引的列中选择特定值来创建子集
要通过从基于索引的列中选择特定值来创建子集，请使用iloc()方法。让我们先导入pandas库
import pandas as pd
创建一个包含产品记录的PandasDataFrame。我们有3列
dataFrame = pd.DataFrame({"Product": ["SmartTV", "ChromeCast", "Speaker", "Earphone"],
"Opening_Stock": [300, 700, 1200, 1500],"Closing_Stock": [200, 500, 1000, 900]})使用iloc(
print"\nDisplaying a subset using iloc() = \n",dataFrame.iloc[0:2, 0:2]
示例
以下是完整代码
import pandas as pd
dataFrame = pd.DataFrame({"Product": ["SmartTV", "ChromeCast", "Speaker", "Earphone"],
"Opening_Stock": [300, 700, 1200, 1500],"Closing_Stock": [200, 500, 1000, 900]})
print"DataFrame...\n",dataFrame
print"\nDisplaying a subset:\n",dataFrame['Product']
#使用iloc()创建具有2列和1st2行的子集
print"\nDisplaying a subset using iloc() = \n",dataFrame.iloc[0:2, 0:2]输出结果这将产生以下输出
DataFrame... Closing_Stock Opening_Stock Product 0 200 300 SmartTV 1 500 700 ChromeCast 2 1000 1200 Speaker 3 900 1500 Earphone Displaying a subset: 0 SmartTV 1 ChromeCast 2 Speaker 3 Earphone Name: Product, dtype: object Displaying a subset using iloc() = Closing_Stock Opening_Stock 0 200 300 1 500 700
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