Python简单处理坐标排序问题示例

# -*- coding:utf-8 -*-
#! python2
a=[(4,5),(2,4),(3,4),(1,1),(2,5)]
print a
def zuobiaopaixu(a):
  b=[]
  l=len(a)
  for i in range(l):
    j=i
    for j in range(l):
      if (a[i][0]<a[j][0]):
        a[i],a[j]=a[j],a[i]
      if (a[i][1]>a[j][1]):
        a[i],a[j]=a[j],a[i]
  for k in range(len(a)):
    b.append(a[k])
  return b
b=zuobiaopaixu(a)
print b