list 如何在python列表中附加行？
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How to append rows in a python list?
提问by dSb
I want to append a row in a python list.
我想在 python 列表中附加一行。
Below is what I am trying,
下面是我正在尝试的，
# Create an empty array
arr=[]
values1 = [32, 748, 125, 458, 987, 361]
arr = np.append(arr, values1)
print arr
[ 32. 748. 125. 458. 987. 361.]
[ 32. 748. 125. 458. 987. 361. ]
I want to append second row in the list, so that I will get an array like
我想在列表中附加第二行，这样我就会得到一个数组
[ [32. 748. 125. 458. 987. 361.], [42. 344. 145. 448. 187. 304.]]
[ [32. 748. 125. 458. 987. 361.], [42. 344. 145. 448. 187. 304.]]
I am getting error when I try to add second row
当我尝试添加第二行时出现错误
values2 = [42, 344, 145, 448, 187, 304]
arr = np.append(arr, values2)
How to do that?
怎么做？
回答by Hugo
Just append directly to your original list:
只需直接附加到您的原始列表中：
# Create an empty list
my_list = []
values1 = [32, 748, 125, 458, 987, 361]
my_list.append(values1)
print(my_list)
values2 = [42, 344, 145, 448, 187, 304]
my_list.append(values2)
print(my_list)
And this will be your output:
这将是您的输出：
[[32, 748, 125, 458, 987, 361]]
[[32, 748, 125, 458, 987, 361], [42, 344, 145, 448, 187, 304]]
Hope that helps!
希望有帮助！
