python foundation - built-in functions map

num_1=[1,2,10,5,3,7]

# num_2=[]
# for i in num_1:
#     num_2.append(i**2)
# print(num_2)


# def map_test(array):
#     num_2=[]
#     for i in num_1:
#         num_2.append(i**2)
#     return num_2
#
# ret=map_test(num_1)
# print(ret)


num_1=[1,2,10,5,3,7]

#lambda x:x+1
#def add_one(x):
    #return x+1

#lambda x:x-1
def reduce_one(x):
    return x-1

#lambda x:x**2
def pf(x):
    return x**2



#最终结果
def map_test(func,array):#num_1=[1,2,10,5,3,7]
    num_2=[]
    for i in array:
        res=func(i)#lambda匿名函数
        num_2.append(res)
    return num_2

#print(map_test(add_one,num_1))
print(map_test(lambda x:x+1,num_1))
# print(map_test(lambda x:x-1,num_1))
# print(map_test(lambda x:x**2,num_1))
#Print (map_test (reduce_one, NUM_1)) 
# Print (map_test (PF, NUM_1)) 



# the Map built-in function 
NUM = the Map ( the lambda the X-: the X-+ 1, NUM_1) # pass an anonymous function, map function default will be iterative parameter iterative operations, and operation parameters used for each of the foregoing functions, and returns a map iterable 
Print (type (NUM))
 # for I in NUM: 
#      Print (I) 

Print (List (NUM)) 

# pass a custom function 
Print (List (the Map (reduce_one, NUM_1))) # parameters First, the function expression parameter 2 is iterables 

msg = " linhaifeng " 
MEA = List (the Map ( the lambda the X-: x.upper ( ), msg))
 Print (MEA)