Python Learning (i) Turtle drawing __python

Some common functions:

1) turtle.pensize (): Set the thickness of the line;

2) Turtle.speed (): Set the speed of drawing, 1-10,1 slowest, 10 fastest;

3) Turtle.begin_fill (): Ready to start filling graphics;

4) Turtle.circle (50,steps=3): Circle function used before, is to draw a radius of radius of the circle, here is the extension, steps represents the radius of 50 in the circle of the built-in steps polygon;

5) Turtle.end_fill (): Fill complete;

6) Turtle.write (s,font= ("Font-name", Font_size, "Font_type"): Write text, s for text, font is the parameter of font, which is the font name, size and type respectively;

7) Turtle.hideturtle (): Hidden arrows display;

8) Turtle.backward (d): corresponds to the Forward () function, which draws lines and arrows from the tail to the head;

9) Turtle.left (angle): counterclockwise rotation of the direction of the arrow;

Turtle.undo (): Undo the last turtle action;

One) turtle.screensize (w,h): Set the length and width of the turtle window;

Turtle.clear (): Empty the Turtle window, but turtle position and status will not change;

Turtle.reset (): Clears the window, resets the turtle state to the starting State;

Turtle.showturtle (): Corresponds to the hideturtle () function;

Turtle.filling (): Returns whether the current is in the fill state; True is filling,false to not filling;

Turtle.isvisible (): Returns whether the current turtle is visible.
Turtle.pos ():

Example:

#画太阳花
Import Turtle
import time

turtle.color (' Red ', ' yellow ')
Turtle.begin_fill () while
True:
    Turtle.forward
    turtle.left (170)
    If ABS (Turtle.pos ()) < 1: Break
Turtle.end_fill ()
turtle.done ()
time.sleep (10)

As shown in figure:

Draw the Pentagram:

#绘制五角星
Import Turtle
import time

turtle.fillcolor (' red ')
Turtle.begin_fill () while
True:
    Turtle.forward
    turtle.right (144)
    If ABS (Turtle.pos ()) < 1: Break
Turtle.end_ Fill ()
time.sleep (20)

As shown in figure:

To draw a colored helix:

#绘制彩色螺旋线
Import Turtle
import time
turtle.pensize (2)
Turtle.bgcolor ("black")
colors = ["Red", " Yellow "," purple "," blue "]
turtle.tracer (False) for
x in range ():
    turtle.forward (2*x)
    Turtle.color (colors[x% 4])
    Turtle.left ($)
turtle.tracer (True)
# input ()   can effectively resolve the flicker problem, or the following method
Time.sleep (20)

As shown in figure: