获取num列中，值在num_with_fault中的值对应的index

    1. num_with_fault=[1,2,4]
    2. df['num']=[3,4,2,55,6]
    4. index_with_fault = df[df.loc[:, 'num'].isin(num_with_fault)].index
    5. print(index_with_fault)
    7. [1, 2]