更新对应文章代码——轩辕御龙

Author: lierchao1997

xuanyuanyulong/2020-02-29-python-spiro/Spiro.py

@@ -0,0 +1,124 @@
+import turtle
+import math
+import random
+
+import sys
+
+class Spiro:
+    def __init__(self, R, r, l, num, color):
+        """
+        :params R: int. 大圆半径
+        :params r: int. 小圆半径
+        :params l: float. 画笔到小圆圆心的距离与小圆半径之比，在[0,1)区间
+        :params num: int. 要画的完整曲线个数
+        :params color: string, (int, int, int), (float, float, float). 指定曲线颜色
+        """
+        self.R = R
+        self.r = r
+        self.l = l
+        self.num = num
+        self.pen = turtle.Turtle()
+        self.pen.pencolor(color)
+        turtle.colormode(1.0)
+        
+
+    def drawSingleSpiro(self):
+        # 周期数 p
+        p = self.periods()
+
+        for i in range(0, 360*p + 2, 2):
+            if i != 0:
+                self.pen.setpos(*self.cor_x_y_Spiro(i))
+            else:
+                self.pen.up()
+                self.pen.setpos(*self.cor_x_y_Spiro(i))
+                self.pen.down()
+
+
+    def drawWhole(self):
+        for s in range(self.num):
+            if s != 0:
+                self.randomSetting()
+                self.drawSingleSpiro()
+            else:
+                self.drawSingleSpiro()
+
+
+    def randomSetting(self):
+        self.l = random.random()
+
+        # r = int(random.random() * 255)
+        # g = int(random.random() * 255)
+        # b = int(random.random() * 255)
+        r = random.random()
+        g = random.random()
+        b = random.random()
+        self.pen.pencolor((r, g, b))
+
+
+    def hcf(self, x, y):
+        if x == y:
+            result = x
+        elif x > y:
+            result = self.hcf(x-y, y)
+        else:
+            result = self.hcf(x, y-x)
+        return result
+
+
+    def periods(self):
+        div = self.hcf(self.R, self.r)
+        return self.r//div
+    
+
+    def cor_x_y_Spiro(self, theta):
+        k = self.r/self.R
+        ef = 1 - k
+        
+        rad = self.degreeToRadian(theta)
+        x = self.R*(ef*math.cos(rad) + self.l*k*math.cos(ef/k*rad))
+        y = self.R*(ef*math.sin(rad) - self.l*k*math.sin(ef/k*rad))
+    
+        return (x, y)
+    
+
+    def degreeToRadian(self, degree):
+        return degree * math.pi / 180
+
+if __name__ == "__main__":
+    # s = Spiro(100, 40, 0.6, 10, "pink")
+    # s.drawWhole()
+    # turtle.mainloop()
+    if len(sys.argv) == 1:
+        """
+        示例输入：python Spiro.py
+        """
+        s = Spiro(100, 40, 0.6, 10, "pink")
+        s.drawWhole()
+        turtle.mainloop()
+    elif len(sys.argv[5].split(',')) == 1:
+        """
+        示例输入：python Spiro.py 100 40 0.6 10 pink
+        """
+        s = Spiro(int(sys.argv[1]), int(sys.argv[2]), float(sys.argv[3]), 
+                int(sys.argv[4]), sys.argv[5])
+        s.drawWhole()
+        turtle.mainloop()
+    else:
+        """
+        示例输入：python Spiro.py 100 40 0.6 10 "251,165,59"
+        """
+        rgb_list = sys.argv[5].split(',')
+        rgb =[]
+        for color in rgb_list:
+            color = int(color)/255
+            rgb.append(color)
+        
+        rgb = tuple(rgb)
+        s = Spiro(int(sys.argv[1]), int(sys.argv[2]), float(sys.argv[3]), 
+                    int(sys.argv[4]), rgb)
+        s.drawWhole()
+        turtle.mainloop()
+    # print(sys.argv)
+    # # print(sys.argv[1].split(','))
+    # int('25,36,55')

xuanyuanyulong/2020-02-29-python-spiro/__init__.py

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+import PyPDF2
+
+inputName = "input.pdf"
+watermarkName = "watermark.pdf"
+outputName = "output.pdf"
+
+pdfInput = PyPDF2.PdfFileReader(inputName)
+watermark = PyPDF2.PdfFileReader(watermarkName).getPage(0)
+
+pdfWriter = PyPDF2.PdfFileWriter()
+
+# print(pdfInput.numPages)
+# print(pdfInput.getNumPages())
+
+for i in range(pdfInput.numPages):
+    page = pdfInput.getPage(i)
+    page.mergePage(watermark)
+    pdfWriter.addPage(page)
+
+with open(outputName, "wb") as f:
+    pdfWriter.write(f)

xuanyuanyulong/2020-03-27-PDF-watermark/__init__.py

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+# Python 代码实例
+
+Python技术 公众号文章代码库
+
+- [2020-02-29-python-spiro](https://github.com/JustDoPython/python-examples/tree/master/xuanyuanyulong/2020-02-29-python-spiro)
+- [2020-03-27-PDF-watermark](https://github.com/JustDoPython/python-examples/tree/master/xuanyuanyulong/2020-03-27-PDF-watermark)
+
+
+关注公众号：python 技术，回复"python"一起学习交流
+
+![](http://favorites.ren/assets/images/python.jpg)