用户选择参数值的 Tkinter 小部件，但如何存储这些值？

Question

My objective is to create three variables called 'Number of pipes','Anisotropy ratio', 'Filter depth (in cm)' which values are chosen by the user (through a User interface). I achieved to create the scrollbar of Tkinter and to enter values but these are not stored as variables. Could someone give me a hand solving that? I am new in Python and specially I am struggling with Tkinter. The code is developped in Python 3.7:

root = tk.Tk()

root.geometry('1000x1000') 



#Description show in window
info=tk.Label(root,anchor='e')
info.pack()

#Parameters


parameters = ('Number of pipes','Anisotropy ratio', 'Filter depth (in cm)')

def ask_parameter(entry):

    user_pipes = str (entry['Number of pipes'].get()) 


    user_aniso = str (entry['Anisotropy ratio'].get()) #effective screen length = b

    user_depth = str (entry['Filter depth (in cm)'].get()) 
    print(user_pipes,user_aniso,user_depth)


#if parameters 
#        return True
#    else:
#        tkinter.messagebox.showwarning ('Only numbers', 'Try again')
#        return True
#        


def form(parameters):
    entry = {}
    for parameter in parameters:
        print(parameter)
        row = tk.Frame(root)
        lab = tk.Label(row, width=15, text=parameter+": ", anchor='w')
        ent = tk.Entry(row)      
        row.pack(side=tk.TOP, 
                 fill=tk.X, 
                 padx=2, 
                 pady=2)
        lab.pack(side=tk.LEFT)
        ent.pack(side=tk.RIGHT, expand=tk.YES,fill=tk.X)
        entry[parameter] = ent
    return entry


if __name__ == '__main__':
    ents = form(parameters)


save_button = tk.Button(root)
save_button.configure(text='Save', command=lambda: ask_parameter(ents))
save_button.pack()
root.mainloop()

Any problem is shown with the code but the parameters are not stored as variables with the entered values. Thank you very much for your time.

Answer 1

您的代码将通过 GUI 输入的值存储到变量中，您的问题可能是您的变量不是全局变量，因此您将无法在创建它们的函数之外使用它们。您可以解决这个问题带有return ，或者通过将global varname放在每个变量的定义之上以及每个将使用它的函数的开头来使它们成为全局变量。