Although 2.14 Valentine's Day has passed, there will be White Valentine's Day, Black Valentine's Day, Rose Valentine's Day...
If you have someone in mind, hurry up and seize the opportunity to express your love!
Python romantic confession!
Python has a super powerful drawing function, which can give you a helping hand when you are ready to confess your love.
Python import package
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib import cm
from mpl_toolkits.mplot3d import Axes3Dsend a rose
fig = plt.figure(figsize=(12, 10))
ax = fig.gca(projection='3d')
[x, t] = np.meshgrid(np.array(range(25)) / 24.0,
np.arange(0, 575.5, 0.5) / 575 * 30 * np.pi - 4*np.pi
)
p = (np.pi / 2) * np.exp(-t / (8 * np.pi))
change = np.sin(20*t)/50
u = 1 - (1 - np.mod(3.3 * t, 2 * np.pi) / np.pi) ** 4 / 2 + change
y = 2 * (x ** 2 - x) ** 2 * np.sin(p)
r = u * (x * np.sin(p) + y * np.cos(p)) * 1.5
h = u * (x * np.cos(p) - y * np.sin(p))
c = plt.get_cmap('magma')
surf = ax.plot_surface(r * np.cos(t), r * np.sin(t), h, rstride=1, cstride=1,
cmap= c, linewidth=0, antialiased=True)
plt.show()
What! The color is too monotonous? How about a colorful one?
fig = plt.figure(figsize=(12, 10))
ax = fig.gca(projection='3d')
[x, t] = np.meshgrid(np.array(range(25)) / 24.0,
np.arange(0, 575.5, 0.5) / 575 * 17 * np.pi - 2 * np.pi)
p = (np.pi / 2) * np.exp(-t / (8 * np.pi))
u = 1 - (1 - np.mod(3.6 * t, 2 * np.pi) / np.pi) ** 4 / 2
y = 2 * (x ** 2 - x) ** 2 * np.sin(p)
r = u * (x * np.sin(p) + y * np.cos(p))
h = u * (x * np.cos(p) - y * np.sin(p))
c = cm.gist_rainbow_r
surf = ax.plot_surface(r * np.cos(t), r * np.sin(t), h, rstride=1, cstride=1,
cmap= c, linewidth=0, antialiased=True)
plt.show()
Get rid of the green and keep the red of the rose
fig = plt.figure(figsize=(12, 10))
ax = fig.gca(projection='3d')
[x, t] = np.meshgrid(np.array(range(25)) / 24.0,
np.arange(0, 575.5, 0.5) / 575 * 17 * np.pi - 2 * np.pi)
p = (np.pi / 2) * np.exp(-t / (8 * np.pi))
u = 1 - (1 - np.mod(3.6 * t, 2 * np.pi) / np.pi) ** 4 / 2
y = 2 * (x ** 2 - x) ** 2 * np.sin(p)
r = u * (x * np.sin(p) + y * np.cos(p))
h = u * (x * np.cos(p) - y * np.sin(p))
c= cm.get_cmap('spring_r')
surf = ax.plot_surface(r * np.cos(t), r * np.sin(t), h, rstride=1, cstride=1,
cmap= c, linewidth=0, antialiased=True)
plt.show()
Roses are in full bloom! I wish you a successful confession!
fig = plt.figure(figsize=(12, 10))
ax = fig.gca(projection='3d')
[x, t] = np.meshgrid(np.array(range(25)) / 24.0,
np.arange(0, 575.5, 0.5) / 575 * 6 * np.pi - 4*np.pi)
p = (np.pi / 2) * np.exp(-t / (8 * np.pi))
change = np.sin(10*t)/20
u = 1 - (1 - np.mod(5.2 * t, 2 * np.pi) / np.pi) ** 4 / 2 + change
y = 2 * (x ** 2 - x) ** 2 * np.sin(p)
r = u * (x * np.sin(p) + y * np.cos(p)) * 1.5
h = u * (x * np.cos(p) - y * np.sin(p))
c= plt.get_cmap('spring_r')
surf = ax.plot_surface(r * np.cos(t), r * np.sin(t), h, rstride=1, cstride=1,
cmap= c, linewidth=0, antialiased=True)
plt.show()
Drawing diagrams with Python turtles
import turtle
import random
# 输入你爱人的姓名:
my_love = "刘亦菲"
def love(x, y):
lv = turtle.Turtle()
lv.hideturtle()
lv.up()
lv.goto(x, y) # 定位到(x,y)
def curvemove(): # 画圆弧
for i in range(20):
lv.right(10)
lv.forward(2)
lv.color('red', 'pink')
lv.speed(10000)
lv.pensize(1)
# 开始画爱心
lv.down()
lv.begin_fill()
lv.left(140)
lv.forward(22)
curvemove()
lv.left(120)
curvemove()
lv.forward(22)
lv.write(my_love, font=("Arial", 12, "normal"), align="center")
lv.left(140)
lv.end_fill()
def tree(branchLen, t):
if branchLen > 5:
if branchLen < 20:
t.color("blue")
t.pensize(random.uniform((branchLen + 5) / 4 - 2, (branchLen + 6) / 4 + 5))
t.down()
t.forward(branchLen)
love(t.xcor(), t.ycor())
t.up()
t.backward(branchLen)
t.color("brown")
return
t.pensize(random.uniform((branchLen + 5) / 4 - 2, (branchLen + 6) / 4 + 5))
t.down()
t.forward(branchLen)
# 递归
ang = random.uniform(15, 45)
t.right(ang)
tree(branchLen - random.uniform(12, 16), t)
t.left(2 * ang)
tree(branchLen - random.uniform(12, 16), t)
t.right(ang)
t.up()
t.backward(branchLen)
myWin = turtle.Screen()
t = turtle.Turtle()
t.hideturtle()
t.speed(100)
t.left(90)
t.up()
t.backward(200)
t.down()
t.color("brown")
t.pensize(32)
t.forward(60)
tree(100, t)
myWin.exitonclick()
Above we used Matplotlib drawing and Python drawing
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