Read and draw from separated classes

Author: codingEzio

chap01_python101/readfile_multiplelinerecords_usingclass.py

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+import turtle
+from turtlecommands import (
+    GoToCommand,
+    CircleCommand,
+    BeginFillCommand,
+    EndFillCommand,
+    PenUpCommand,
+    PenDownCommand,
+)
+
+
+class PyList:
+    def __init__(self):
+        self.items = []
+
+    def append(self, item):
+        self.items = self.items + [item]
+
+    def __iter__(self):
+        for item in self.items:
+            yield item
+
+
+def main():
+    filename = "./src/turtle_commands_multiplelines.txt"
+    t = turtle.Turtle()
+    screen = t.getscreen()
+    graphic_commands = PyList()
+
+    with open(file=filename, mode="r") as file:
+        command = file.readline().strip()
+
+        while command != "":
+            if command == "goto":
+                x, y = float(file.readline()), float(file.readline())
+                width = float(file.readline())
+                color = file.readline().strip()
+                cmd = GoToCommand(x, y, width, color)
+
+            elif command == "circle":
+                radius, width = float(file.readline()), float(file.readline())
+                color = file.readline().strip()
+                cmd = CircleCommand(radius, width, color)
+
+            elif command == "beginfill":
+                color = file.readline().strip()
+                cmd = BeginFillCommand(color)
+
+            elif command == "endfill":
+                cmd = EndFillCommand()
+
+            elif command == "penup":
+                cmd = PenUpCommand()
+
+            elif command == "pendown":
+                cmd = PenDownCommand()
+
+            else:
+                raise RuntimeError(f"Unknown command: {command}")
+
+            graphic_commands.append(cmd)
+            command = file.readline().strip()
+
+        for cmd in graphic_commands:
+            cmd.draw(t)
+
+        t.hideturtle()
+        screen.exitonclick()
+
+        print("Program execution completed.")
+
+
+if __name__ == "__main__":
+    main()

chap01_python101/turtlecommands.py

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+class GoToCommand:
+    def __init__(self, x: int, y: int, width=1, color="black"):
+        self.x = x
+        self.y = y
+        self.width = width
+        self.color = color
+
+    def draw(self, turtle):
+        turtle.width(self.width)
+        turtle.pencolor(self.color)
+        turtle.goto(self.x, self.y)
+
+
+class CircleCommand:
+    def __init__(self, radius, width=1, color="black"):
+        self.radius = radius
+        self.width = width
+        self.color = color
+
+    def draw(self, turtle):
+        turtle.width(self.width)
+        turtle.pencolor(self.color)
+        turtle.circle(self.radius)
+
+
+class BeginFillCommand:
+    def __init__(self, color):
+        self.color = color
+
+    def draw(self, turtle):
+        turtle.fillcolor(self.color)
+        turtle.begin_fill()
+
+
+class EndFillCommand:
+    def __init__(self):
+        pass
+
+    def draw(self, turtle):
+        turtle.end_fill()
+
+
+class PenUpCommand:
+    def __init__(self):
+        pass
+
+    def draw(self, turtle):
+        turtle.penup()
+
+
+class PenDownCommand:
+    def __init__(self):
+        pass
+
+    def draw(self, turtle):
+        turtle.pendown()