Canvasvg模块错误

Question

我在写代码来保存和合并用乌龟模块制作的图像，但是当我去保存图像时，一个错误不断出现;我认为关于Canvasvg模块本身？它可能是安装不正确，如果是的话，我该怎么做才能正确？

错误代码：

Exception in Tkinter callback 
Traceback (most recent call last): 
    File "D:\Python Program\lib\idlelib\run.py", line 137, in main 
    seq, request = rpc.request_queue.get(block=True, timeout=0.05) 
    File "D:\Python Program\lib\queue.py", line 172, in get 
    raise Empty 
queue.Empty 

During handling of the above exception, another exception occurred: 

Traceback (most recent call last): 
    File "D:\Python Program\lib\tkinter\__init__.py", line 1699, in __call__ 
    return self.func(*args) 
    File "D:\Python Program\lib\turtle.py', line 686, in eventfun 
    fun() 
    File "C:\Users\garla\Desktop\tst.py", line 75, in saveImg 
    canvasvg.saveall(ts , namesav) 
    File "D:\Python Program\lib\canvasvg\canvasvg.py', line 337, in saveall 
    for element in convert(doc, canvas, items, tounicode): 
    File "D:\Python Program\lib\canvasvg\canvasvg.py", line 84, in convert 
    tk = canvas.tk 
AttributeError: 'str' object has no attribute 'tk' 

这里是它采用canvasvg代码：

def saveImg() : 
    print("Done.") 
    save = input("Would you like to save this ? Y/N \n") 
    if save.upper() == "Y" : 
     Red.hideturtle() 
     Blue.hideturtle() 
     name = input("File Name :") 
     namesav = name + " .jpg" 
     ts = turtle.getscreen() .getcanvas() 
     canvasvg.saveall(ts , namesav) 
    elif save.upper() == "N" : 
     def runChk() : 
      runAgain = input("Would you like to run again? Y?N (N will Exit)") 
      if runAgain.upper() == "Y" : 
       print("Running") 
       main() 
      elif runAgain.upper() == "N" : 
       print ("Exiting...") 
       exit() 
      else : 
       print("Invalid response.") 
       runChk() 
      runChk() 
    else : 
     print("Invalid Response.") 
     saveImg() 

所有帮助表示赞赏。

Answer 1

我的猜测是你的问题来自于这些行：

namesav = name + ".jpg" 

ts = turtle.getscreen().getcanvas() 

canvasvg.saveall(ts, namesav) 

我看到两个问题。第一个问题是saveall()方法接受它的参数以相反的顺序比你给了他们：

saveall(filename, canvas, items=None, margin=10, tounicode=None) 

的第二个问题是，你所使用的扩展".jpg"当这个代码将会给你回".svg"文件。该canvasvg模块用于Save Tkinter Canvas in SVG file

此外，我相信您的电话runChk()缩进不正确。返工代码：

def saveImg(): 
    print("Done.") 

    save = input("Would you like to save this? Y/N: ") 

    if save.upper() == "Y": 
     Red.hideturtle() 
     Blue.hideturtle() 
     name = input("File Name: ") 
     namesav = name + ".svg" 
     ts = turtle.getscreen().getcanvas() 
     canvasvg.saveall(namesav, ts) 
    elif save.upper() == "N": 
     def runChk(): 
      runAgain = input("Would you like to run again? Y/N (N will Exit): ") 

      if runAgain.upper() == "Y": 
       print("Running") 
       main() 
      elif runAgain.upper() == "N": 
       print("Exiting...") 
       exit() 
      else: 
       print("Invalid response.") 
       runChk() 
     runChk() 
    else: 
     print("Invalid Response.") 
     saveImg() 

我也有一个问题，你的递归错误处理，但是这是编程风格和不影响你的代码的行为的东西。