跨类连接tKinter按钮

Question

所以我对tKinter很陌生，以及在python中使用类来达到我在这里使用它们的程度。我在这个话题上做了大量的研究，但我很难把它放在一起。问题是;我有我的主要类下的def函数，第一个是def class_Window（它创建一个电子表格），另一个是def按钮（实质上是保存我创建的所有按钮）。我正在使用tkintertable.Tables.TableCanvas保存函数来制作保存表按钮的过程，并生成一个pickle文件。对于我的生活，我无法弄清楚如何将按钮链接到定义函数中的表类。

我得到的错误是无效的语法或没有属性。

如何得到这个跨来的任何帮助将是巨大的

class AccuracyAssessmentApp: 
def __init__(self, parent=Tk()): 
    self.mainWindow = (parent) 
    self.mainWindow.title("Accuracy Assessment") 
    self.mainWindow.geometry("1000x700") 
    self.make_txt() 
    self.pos_lbl() 
    self.buttons() 
    self.class_Window() 
    self.title_label() 


def make_txt(self): 
    self.text = Text(self.mainWindow, width = 80, height = 40, background = "#A8A8A8") 
    self.text.pack(expand = TRUE, fill = BOTH) 


def pos_lbl(self): 
    self.pos = Label(self.mainWindow, text = "0,0") 
    self.pos.place(x=0, y=0) 

    self.pos1 = Label(self.mainWindow, text = "0,350") 
    self.pos1.place(x=0, y=350) 

    self.pos2 = Label(self.mainWindow, text = "500,0") 
    self.pos2.place(x=500, y=0) 

def class_Window(self): 
    self.tableFrame = Frame() 
    self.tableFrame.place(x=680,y=200) 
    self.table = TableCanvas(self.tableFrame, rows=30,cols=2, width=240) 
    self.table.createTableFrame() 

def title_label(self): 
    self.titleFrame = Frame(self.mainWindow, bg= '#4A766E', relief="raised", bd=10) 
    self.titleFrame.place(x=385, y=20) 
    self.title = Label(self.titleFrame, text=("""Accuracy Assessment"""), font=LARGE_FONT, bg= '#4A766E', fg="white", justify="center") 
    self.title.pack(pady=10, padx=10) 

def buttons(self): 
    Button(self.mainWindow, text="Quit", command=self.mainWindow.destroy).place(x=10,y=665) 
    Button(self.mainWindow, text="Save", command=self.table.save("AssessmentTable")) 

这是错误我得到：

runfile('I:/Custom_Scripts/Personal/AccuracyAssessment/AccuracyAssessment_v2.py', wdir='I:/Custom_Scripts/Personal/AccuracyAssessment') 
Traceback (most recent call last): 

    File "<ipython-input-1-d9c198c0cd24>", line 1, in <module> 
    runfile('I:/Custom_Scripts/Personal/AccuracyAssessment/AccuracyAssessment_v2.py', wdir='I:/Custom_Scripts/Personal/AccuracyAssessment') 

    File "C:\Users\jpc08005\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 699, in runfile 
    execfile(filename, namespace) 

    File "C:\Users\jpc08005\AppData\Local\Continuum\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 74, in execfile 
    exec(compile(scripttext, filename, 'exec'), glob, loc) 

    File "I:/Custom_Scripts/Personal/AccuracyAssessment/AccuracyAssessment_v2.py", line 79, in <module> 
    app = AccuracyAssessmentApp() 

    File "I:/Custom_Scripts/Personal/AccuracyAssessment/AccuracyAssessment_v2.py", line 41, in __init__ 
    self.buttons() 

    File "I:/Custom_Scripts/Personal/AccuracyAssessment/AccuracyAssessment_v2.py", line 75, in buttons 
    Button(self.mainWindow, text="Save", command=self.table.save("AssessmentTable")) 

AttributeError: AccuracyAssessmentApp instance has no attribute 'table' 

Answer 1

考虑以下代码：

Button(..., command=self.table.save("AssessmentTable")) 

你立即致电self.table.save("AssessmentTable")在该按钮被创建的时间。这在self.table已被创建之前被调用。因此你得到属性错误。

点击按钮时，您只需拨打self.table.save即可。最简单的方法是创建一个保存表格的函数，然后在回调中引用该按钮：

def save_table(self): 
    self.table.save("AssessmentTable") 

def buttons(self): 
    Button(..., command=self.save_table)