python声明变量的快速方法（将Dataframe转换为numpy数组）

有没有办法减少下面的代码？此代码用于根据

number\u输入声明变量

if number_inputs == 1:
    data_input = data[['t-1']].values
elif number_inputs == 2:
    data_input = data[['t-2', 't-1']].values
elif number_inputs == 3:
    data_input = data[['t-3', 't-2', 't-1']].values
elif number_inputs == 4:
    data_input = data[['t-4', 't-3', 't-2', 't-1']].values
elif number_inputs == 5:
    data_input = data[['t-5', 't-4', 't-3', 't-2', 't-1']].values
elif number_inputs == 6:
    data_input = data[['t-6', 't-5', 't-4', 't-3', 't-2', 't-1']].values
elif number_inputs == 7:
    data_input = data[['t-7', 't-6', 't-5', 't-4', 't-3', 't-2', 't-1']].values
elif number_inputs == 8:
    data_input = data[['t-8','t-7', 't-6', 't-5', 't-4', 't-3', 't-2', 't-1']].values
elif number_inputs == 9:
    data_input = data[['t-9','t-7', 't-6', 't-5', 't-4', 't-3', 't-2', 't-1']].values

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你是说熊猫，不是努比？我正在努力理解这段代码是如何工作的

x = ['t-'+str(i) for i in range(1, 10)]    
for i in range(1, 10):
    if number == i: 
        data_input=data[x[i-1::-1]].values