3月14日 我用Python几十行代码为女朋友画了一个爱心

今天是个特殊的日子，圆周率日，哈哈！来对你爱的人表达爱吧！
女朋友就是我爱人啦！

# -*- coding:utf-8 -*-
# @Python Version: 3.7
# @Time: 2020/3/14 13:14
# @Author: Michael Ming
# @Website: https://michael.blog.csdn.net/
# @File: Valentine'sDay.py
# @Reference: 
import matplotlib.pyplot as plt
import numpy as np
from decimal import Decimal
from decimal import getcontext
import time


def heartfunc(x, y):
    return (x ** 2 + y ** 2 - 1) ** 3 - x ** 2 * y ** 3 <= 0


def cal_pi(precision):
    getcontext().prec = precision
    return sum(1 / Decimal(16) ** k *
               (Decimal(4) / (8 * k + 1) -
                Decimal(2) / (8 * k + 4) -
                Decimal(1) / (8 * k + 5) -
                Decimal(1) / (8 * k + 6)) for k in range(precision))


def printer(text, delay=0.1314):
    """打字机效果"""
    for ch in text:
        print(ch, end='', flush=True)
        time.sleep(delay)


if __name__ == '__main__':
    n = 1314
    x = np.linspace(-2, 2, n)
    y = np.linspace(-2, 2, n)
    X, Y = np.meshgrid(x, y)
    plt.contourf(X, Y, heartfunc(X, Y), cmap=plt.cm.autumn)
    # 颜色查询 https://matplotlib.org/examples/color/colormaps_reference.html
    plt.title("5201314")
    plt.show()

    loveInPi = str(cal_pi(1314))
    heart = ['5', '2', '0', '1', '3', '1', '4']
    iloveyou = "5201314"
    love = ""
    i, j = 0, 0
    while love != iloveyou:
        if loveInPi[i] == heart[j]:
            love += loveInPi[i]
            j += 1
        i += 1
    printer("Michael在圆周率中找到了爱的誓言：" + love + " to my love!")

Michael在圆周率中找到了爱的誓言：5201314 to my love!

爱是恒久忍耐，又有恩慈；爱是不嫉妒；爱是不自夸，不张狂，
Love is patient, love is kind. It does not envy, it does not boast, it is not proud.
不做害羞的事，不求自己的益处，不轻易发怒，不计算人的恶，
It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs.
不喜欢不义，只喜欢真理；
Love does not delight in evil but rejoices with the truth.
凡事包容，凡事相信，凡事盼望，凡事忍耐。
It always protects, always trusts, always hopes, always perseveres.
爱是永不止息。 (哥林多前书 13:4-8 )
Love never fails. (Corinthians 13:4-8 NIV)

本文参考：

Python 必杀技:用 print() 函数实现的三个特效
一个神奇的公式计算Pi的任意位数