###字母首写大写
L1 = ['AdmIn','anny','LUCY','sandY','wILl']
def normallize(name):
    return name.capitalize()

L2=map(normallize,L1)
# L2 = list(map(normallize,L1))
print(type(L2))

运行结果：['Admin', 'Anny', 'Lucy', 'Sandy', 'Will']

　　

L1 = ['AdmIn','anny','LUCY','sandY','wILl']
L2=[]
for i in L1:
    L2.append(i.capitalize())
print(L2)

　　

def square(x) :         # 计算平方数
    return x ** 2
print(map(square,[2,3,4,5]))
print(list(map(square,[2,3,4,5])))