將lst?= [ [1, 2, 3], [2, 1, 3], [8, 4, 3] ],變為[1, 2, 3, 2, 1, 3, 8, 4, 3]
方法
1. myList = [x for j in lst for x in j]
2.?
mylist = []
for i in L:
mylist += i
print(mylist)
3. 使用標準庫中的itertools(循環器)
from itertools import chain
mylist = list(chain(*lst))
print(mylist)