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#coding=utf-8
l = [(73, 2), (73, 3), (73, 4), (77, 2), (77, 3), (77, 4), (77, 5), (77, 6), (77, 7), (84, 2), (84, 3), (84, 4), (88, 2), (88, 3)]
#字典推导式https://www.jianshu.com/p/65f4bebc1061
a = {k: v for k, v in l}
print a
b = []
for keys in a:
b.append((keys,a[keys]))
b.sort()
print b