我希望将新列添加到现有的DataFrame中，并根据df.TaxStatus（1 | 2）的值将df.Public设置为True或False。我看到其他人使用Numpy.where()创建了一个新列，但出现了ValueError。
df['TaxStatus'] = np.where(df.Public == 1, True, np.where(df.Public == 2, False))
这似乎可行，除了ValueError：either both or neither of x and y should be given
答案 0 :(得分：0)
您可以简单地说：
df.Public == 1表达式np.where()返回可以分配给新列的一系列True / False值。无需 {
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