推导式相关

mcase = {'a':10,'b':34,'A':7,'Z':3}
mcase_new = {k.lower():mcase.get(k.lower(),0)+mcase.get(k.upper(),0) for k in mcase}
#print(mcase_new)

def add(n,i):
    return n+i

def test():
    for i in range(4):
        yield i

g=test()
for n in [1,10,5]:
    g=(add(n,i) for i in g)

# n = 1
# g=(add(n,i) for i in g)
# n = 10
# g = (radd(n,i) fo i in g)
# n = 5
# g = (add(n,i) for i in radd(n,i) for i in add(n,i) for i in g)

print(list(g))#到最后才开始运算