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该文算是python版的”Hello world”初探,故作相关的记录。
环境准备:Visual Studio 2017,python
正文
爱心一
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| import numpy as np import matplotlib.pyplot as plt
x_coords = np.linspace(- 100, 100, 500) y_coords = np.linspace(- 100, 100, 500) points = []
for y in y_coords: for x in x_coords: if((x* 0.03)** 2+(y* 0.03)** 2- 1)** 3-(x* 0.03)** 2*(y* 0.03)** 3<= 0: points.append({ "x": x, "y": y})
heart_x = list(map( lambda point: point[ "x"], points)) heart_y = list(map( lambda point: point[ "y"], points))
plt.scatter(heart_x, heart_y, s= 10, alpha= 0.5) plt.show()
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效果如图
爱心二
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import turtle import time
def hart_arc(): for i in range(200): turtle.right(1) turtle.forward(2) def move_pen_position(x, y): turtle.hideturtle() turtle.up() turtle.goto(x, y) turtle.down() turtle.showturtle()
signature= '' love = 'I Love You'
if love == '': love = 'I Love You'
turtle.setup(width=800, height=500) turtle.color('red', 'pink') turtle.pensize(3) turtle.speed(1)
move_pen_position(x=0,y=-180) turtle.left(140) turtle.begin_fill()
turtle.forward(224)
hart_arc() turtle.left(120) hart_arc()
turtle.forward(224) turtle.end_fill()
move_pen_position(0,0) turtle.hideturtle() turtle.color('#CD5C5C', 'pink')
turtle.write(love, font=('Arial', 30, 'bold'), align="center")
if signature != '': turtle.color('red', 'pink') time.sleep(2) move_pen_position(180, -180) turtle.hideturtle() turtle.write(signature, font=('Arial', 20), align="center")
window = turtle.Screen() window.exitonclick()
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效果如下图
爱心三
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| import matplotlib.pyplot as plt from matplotlib.font_manager import FontProperties import numpy as np
x=np.linspace(-2,2,200) y1 =np.sqrt(1-np.square(np.fabs(x)-1)) y2 =np.arccos(1-np.fabs(x))-np.pi
plt.plot(x,y1,'r',x,y2,'r') plt.axis([-2.5,2.5,-3.5,1.5])
plt.title('hello world of python,copy from @andrew',fontsize=16) plt.show()
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效果如下图
遇到问题
在visual studio 2017中命令行执行 pip install numpy 无效
在nuget程序包管理器控制台执行即可
pip install pyinstaller之后生成的exe无法执行
在我电脑上的路径是C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\Scripts,
把run.py拷贝到该目录,执行pyinstaller -F -W p . run.py解决问题
总结
参考资料