1.
def num_sum(a, b, c):
return a + b + c
def num_avg(num_sum):
return num_sum /3
a, b, c = map(int, input('please input 3 numbers,a b c:').split())
print(num_avg(num_sum(a, b, c)))
2.
l = ["jack",("tom",23),"rose",(14,55,67)]
def f(l):
for i in l:
if isinstance(i,tuple):
f(i)
else:
print(i)
f(l)
3.
infors = [{'name': 'qianan', 'age': 28}, {'name': 'an', 'age': 20}, {'name': 'james', 'age': 25}]
print(sorted(infors, key=lambda k: k['name']))
#infor.sort(key=lambda k: k['name'])
#print(infor)