如何从一组坐标中获取列表？

Question

如何把坐标拉平？

For input  :[(1,2),(5,6),(7,8)]

期望输出为 [1,2,5,6,7,8]

Answer 1

这样试试：

mylist = [(1,2),(5,6),(7,8)]
newlist = []
for x in mylist:
  newlist += x
 
print(newlist)

Answer 2

来自 itertools 文档页面

from itertools import chain
def flatten(listOfLists):
    "Flatten one level of nesting"
    return chain.from_iterable(listOfLists)