利用推导式
old = [[1, 2], [3, 4], [5, 6]]
# 从old中一个一个取出值,对取出的值(i)再进行一次遍历取值操作(也可以进行判断或者运算)
new = [j for i in old for j in i]
print(new)
old = [[1, 2], [3, 4], [5, 6]]
# 从old中一个一个取出值,对取出的值(i)再进行一次遍历取值操作(也可以进行判断或者运算)
new = [j for i in old for j in i]
print(new)