Map_Filter_Reduce.py

# Map
# itenms = [1, 2, 3, 4, 5]
# squared = []
# for i in itenms:
#     squared.append(i**2)
# print(squared)
# print("-------------------------------------------------------")
# itenms = [1, 2, 3, 4, 5]
# squared = list(map(lambda i: i**2, itenms))
# print(squared)



# Filter
# itenms = range(-5, 5)
# less_number = list(filter(lambda i: i<0, itenms))
# """
# filter 相当于for循环
# """
# print(less_number)
# print("-------------------------------------------------------")
# itenms = range(-5, 5)
# less_number = list(map(lambda i: i<0, itenms))
# print(less_number)



# Reduce

# from functools import reduce
# product = reduce((lambda x,y: x * y), [1, 2, 3, 4])
# print(product)