在 python 中附加重复列表

Question

I have a list here:

x = [['a', 'b']]

y = ['c', 'd', 'e']

I want to append the list y to make x in the form

x = [['a', 'b'], ['c', 'd', 'e'], ['c', 'd', 'e'], ['c', 'd', 'e']]

x.append(y*3) makes x = [['a', 'b'], ['c', 'd', 'e', 'c', 'd', 'e', 'c', 'd', 'e']]

x.append([y]*3) makes x = [['a', 'b'], [['c', 'd', 'e'], ['c', 'd', 'e'], ['c', 'd', 'e']]]

How can I make the list [['a', 'b'], ['c', 'd', 'e'], ['c', 'd', 'e'], ['c', 'd', 'e']] from x and y ?

Answer 1

try this:

x = [['a', 'b']]

y = ['c', 'd', 'e']

x += [y] * 3

print(x)

This will output:

[['a', 'b'], ['c', 'd', 'e'], ['c', 'd', 'e'], ['c', 'd', 'e']]

Answer 2

x = [['a', 'b']]
y = ['c', 'd', 'e']
x=x+[y]+[y]+[y]
print(x)

output:
[['a', 'b'], ['c', 'd', 'e'], ['c', 'd', 'e'], ['c', 'd', 'e']]