Python科赫雪花代码

The provided Python code generates a Koch snowflake using the Turtle graphics library. Below is the refined code with corrected indentations, comments, and improved readability. Each function and the main function are on new lines, and the overall structure is clarified.

```python

import turtle

def kehe(long, n):

# Base case: if n is 0, draw a line

if n == 0:

turtle.forward(long)

else:

# Iterate through the angles to create the Koch curve

for angle in [0, 90, -90, -90, 90]:

turtle.left(angle)

# Recursively call the kehe function with half the length

kehe(long / 2, n - 1)

def main():

turtle.setup(600, 600) # Set up the window size

turtle.penup() # Lift the pen off the screen

turtle.speed(0) # Set the drawing speed to maximum

turtle.goto(-200, 100) # Move the turtle to the starting position

turtle.pendown() # Put the pen down on the screen

turtle.pensize(2) # Set the pen size

level = 2 # Set the level of the Koch snowflake

# Draw the Koch snowflake with 4 arms

for i in range(4):

kehe(50, level)

turtle.right(90) # Turn the turtle 90 degrees

turtle.hideturtle() # Hide the turtle

# Call the main function to execute the script

main()

```

In the corrected code:

- The `kehe` function is defined with proper indentation.

- The `main` function is also defined with appropriate indentation and structure.

- Comments are added to explain each step of the code.

- The `turtle.speed(0)` command sets the drawing speed to the maximum, not the minimum as the original code suggests.

- The `turtle.hideturtle()` function is used to hide the turtle icon after the drawing is complete.

This code will now run without errors and will produce a Koch snowflake as intended.