Python函数式编程：从入门到走火入魔

一行代码显示“爱心”

>>> print'\n'.join([''.join([('AndyLove'[(x-y)%]if((x*0.05)**+(y*0.1)**-)**-(x*0.05)***(y*0.1)**<= else' ')for x in range(-,)])for y in range(,-,-)])

Python函数式编程：从入门到走火入魔

# @file: data.py
import random
from collections import namedtuple

Student = namedtuple('Student', ['id', 'ans'])

N_Questions =
N_Students = 

def gen_random_list(opts, n):
    return [random.choice(opts) for i in range(n)]

# 问题答案 'ABCD' 随机
ANS   = gen_random_list('ABCD', N_Questions)
# 题目分值 ~ 分
SCORE = gen_random_list(range(,), N_Questions)

QUIZE = zip(ANS, SCORE)
students = [
    # 学生答案为 'ABCD*' 随机，'*' 代表未作答
    Student(_id, gen_random_list('ABCD*', N_Questions))
    for _id in range(, N_Students+)
]

print(QUIZE)
# [('A', ), ('B', ), ('D', ), ...
print(students)
# [Student(id=, ans=['C', 'B', 'A', ...

正常方法：

mport data
def normal(students, quize):
    for student in students:
        sid = student.id
        score =
        for i in range(len(quize)):
            if quize[i][] == student.ans[i]:
                score += quize[i][]
        print(sid, '\t', score)

print('ID\tScore\n==================')
normal(data.students, data.quize)
"""
ID    Score
==================

...
"""

函数式

def cal(quize):
    def inner(student):
        filtered = filter(lambda x: x[] == x[][], zip(student.ans, quize))
        reduced = reduce(lambda x, y: x + y[][], filtered, )
        print(student.id, '\t', reduced)
    return inner
map(cal(QUIZE), students)  

其他好玩的东东