学习Python

# 一行代码实现求阶乘函数
fac = lambda x: __import__('functools').reduce(int.__mul__, range(1, x + 1), 1)

# 一行代码实现求最大公约数函数
gcd = lambda x, y: y % x and gcd(y % x, x) or x

# 一行代码实现判断素数的函数
is_prime = lambda x: x > 1 and not [f for f in range(2, int(x ** 0.5) + 1) if x % f == 0]

# 一行代码实现快速排序
quick_sort = lambda items: len(items) and quick_sort([x for x in items[1:] if x < items[0]]) + [items[0]] + quick_sort([x for x in items[1:] if x > items[0]]) or items

# 生成FizzBuzz列表
['Fizz'[x % 3 * 4:] + 'Buzz'[x % 5 * 4:] or x for x in range(1, 101)]

def fib(num):
    if num in (1, 2):
        return 1
    return fib(num - 1) + fib(num - 2)

from functools import lru_cache


@lru_cache()
def fib(num):
    if num in (1, 2):
        return 1
    return fib(num - 1) + fib(num - 2)


for n in range(1, 121):
    print(f'{n}: {fib(n)}')

temp = a
a = b
b = temp

a = a ^ b
b = a ^ b
a = a ^ b

a, b = b, a

chars = ['j', 'a', 'c', 'k', 'f', 'r', 'u', 'e', 'd']
name = ''
for char in chars:
    name += char

chars = ['j', 'a', 'c', 'k', 'f', 'r', 'u', 'e', 'd']
name = ''.join(chars)

data = [7, 20, 3, 15, 11]
result = []
for i in data:
    if i > 10:
        result.append(i * 3)

data = [7, 20, 3, 15, 11]
result = [num * 3 for num in data if num > 10]

fruits = ['orange', 'grape', 'pitaya', 'blueberry']
index = 0
for fruit in fruits:
    print(index, ':', fruit)
    index += 1

fruits = ['orange', 'grape', 'pitaya', 'blueberry']
for index, fruit in enumerate(fruits):
    print(index, ':', fruit)

data = {'x': '5'}
if 'x' in data and isinstance(data['x'], (str, int, float)) \
        and data['x'].isdigit():
    value = int(data['x'])
    print(value)
else:
    value = None

data = {'x': '5'}
try:
    value = int(data['x'])
    print(value)
except (KeyError, TypeError, ValueError):
    value = None

from enum import *

@unique
class Suite (Enum):
    SPADE, HEART, CLUB, DIAMOND = range(4)

class Card(object):
    def __init__(self,suite,face ):
        self.suite = suite
        self.face = face


    def __repr__(self):
        suites='♠♥♣♦'
        faces=['','A','2','3','4','5','6','7','8','9','10','J','Q','K']
        return f'{suites[self.suite.value]}{faces[self.face]}'

import random

class Poker(object):
    def __init__(self):
        self.cards =[Card(suite, face) for suite in Suite
            for face in range(1, 14)]
        self.current=0
    def shuffle (self):
        self.current=0
        random.shuffle(self.cards)
    def deal (self):
        card = self.cards[self.current]
        self.current+=1
        return card
    def has_next (self):
        if self.current<len(self.cards): return True
        return False

p = Poker()
p.shuffle()
print(p.cards)