python dataframe两列相减

要在Python中使用DataFrame进行两列的相减操作，可以使用以下代码示例：

import pandas as pd

# 创建一个示例DataFrame
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6})

# 使用列名进行相减操作
df['C'] = df['A'] - df['B']

# 打印结果
print(df)

这段代码中，首先创建了一个示例的DataFrame，其中包含两列'A'和'B'。接着，使用列名进行相减操作，将相减的结果存储在新的列'C'中。最后，通过打印DataFrame来查看结果。这样就完成了DataFrame两列的相减操作。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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