Python turtle.setundobuffer()用法及代碼示例

turtle 模塊以麵向對象和麵向過程的方式提供 turtle 圖形基元。由於它使用Tkinter作為基礎圖形，因此需要安裝有Tk支持的Python版本。

turtle .setundobuffer()

該函數用於設置或禁用undobuffer。它采用size參數。如果大小為整數，則會安裝給定大小的空撤銷緩衝區。大小給出了undo()函數可以撤消的最大turtle-actions數。如果大小為無，則不存在撤消緩衝區。

用法:

turtle.setundobuffer(size)

下麵是上述方法的實現和一些示例：

例 1:

Python3

# importing package 
import turtle 
  
# check default value of undobuffer 
print(turtle.undobufferentries()) 
  
# set undo buffer by 10 as value 
turtle.setundobuffer(10) 
  
# loop executes 50 times with 
# turtle.forward(1) statement 
# i.e; undobufferenteries gives 50 
for i in range(50):
      turtle.forward(1) 
      
# but gives 10 as it is set already 
print(turtle.undobufferentries())

輸出：

0
10

範例2：

Python3

# importing package 
import turtle 
  
# print default value 
print(turtle.undobufferentries()) 
  
# loop for motion 
for i in range(50):
    
    # one statement increase the 
    # undobuffer enteries 
    turtle.fd(1) 
      
# print undobuffer enteries ie; 50 
# due to above loop with one statement 
print(turtle.undobufferentries()) 
  
# set undobuffer to None 
turtle.setundobuffer(None) 
  
# print undobuffer enteries 
# i.e; value set by set undobuffer 
print(turtle.undobufferentries())

輸出：

0
50
0

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注：本文由純淨天空篩選整理自deepanshu_rustagi大神的英文原創作品 turtle.setundobuffer() function in Python。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。