我在两个stackoverflow用户的帮助下编写了这段代码。它是应该从GCODE中提取的灯丝值（用于3D打印机的代码来创建对象）的代码。到目前为止，它运行良好，并且值在tkinter窗口中显示，如我所愿。问题是该值表示所用灯丝的体积。现在我想在tkinter窗口中计算并显示另外两个值，1）质量将是volume*1,13，然后是新发现的价格mass*0.175。问题是我无法弄清楚如何使用gcode中的这个值并使其可用于计算。 self.value是从加载的文件中找到的初始变量（这里我附加了可用于测试代码的示例gcode文件：smaple gcode）。我认为问题是这个值是一个字符串，它应该是一个整数来计算代码我试图将它改为整数，但它没有工作，所以我已经评论了它。非常感谢您提供所有可能的提示和帮助。
P.S Additionaly我想在上传文件后更改状态栏，我也遇到了问题。
wholde代码：
from tkinter import *
import re
from tkinter import messagebox
from tkinter import filedialog
# Here, we are creating our class, Window, and inheriting from the Frame
# class. Frame is a class from the tkinter module. (see Lib/tkinter/__init__)
class Window(Frame):
# Define settings upon initialization. Here you can specify
def __init__(self, master=None):
# parameters that you want to send through the Frame class.
Frame.__init__(self, master)
#reference to the master widget, which is the tk window
self.master = master
#with that, we want to then run init_window, which doesn't yet exist
self.init_window()
# Load the gcode file in and extract the filament value
def get_filament_value(self, fileName):
with open(fileName, 'r') as f_gcode:
data = f_gcode.read()
re_value = re.search('filament used = .*? \(([0-9.]+)', data)
if re_value:
value = float(re_value.group(1))
return('Volume of the print is {} cm3'.format(value))
else:
value = 0.0
return('Filament volume was not found in {}'.format(fileName))
return value
def read_gcode(self):
root.fileName = filedialog.askopenfilename(filetypes = (("GCODE files", "*.gcode"), ("All files", "*.*")))
# self.value.set(self.get_filament_value(root.fileName))
volume = self.get_filament_value(root.fileName)
mass = volume * 1.13
price = mass * 0.175
self.volume_text.set('Volume is {}'.format(volume))
self.mass_text.set('Mass is {}'.format(mass))
self.price_text.set('Price is {}'.format(price))
def client_exit(self):
exit()
def about_popup(self):
messagebox.showinfo("About", "Small software created by Bartosz Domagalski to find used filament parameters from Sli3er generated GCODE")
#Creation of init_window
def init_window(self):
# changing the title of our master widget
self.master.title("Filament Data")
# allowing the widget to take the full space of the root window
self.pack(fill=BOTH, expand=1)
# creating a menu instance
menu = Menu(self.master)
self.master.config(menu=menu)
# create the file object)
file = Menu(menu)
help = Menu(menu)
# adds a command to the menu option, calling it exit, and the
# command it runs on event is client_exit
file.add_command(label="Exit", command=self.client_exit)
help.add_command(label="About", command=self.about_popup)
#added "file" to our menu
menu.add_cascade(label="File", menu=file)
menu.add_cascade(label="Help", menu=help)
#Creating the labels
l_instruction = Label(self, justify=CENTER, compound=TOP, text="Load GCODE file to find volume, \n weight and price of used filament.")
l_instruction.pack()
#Creating the button
gcodeButton = Button(self, text="Load GCODE", command=self.read_gcode)
gcodeButton.pack()
# gcodeButton.place(x=60, y=50)
#Label of the used filament
l1 = Label(self, text="")
l1.pack()
l2 = Label(self, text="")
l2.pack()
self.volume_text = StringVar()
l = Label(self, justify=CENTER, compound=BOTTOM, textvariable=self.volume_text)
l.pack()
self.mass_text = StringVar()
m = Label(self, justify=CENTER, compound=BOTTOM, textvariable=self.mass_text)
m.pack()
self.price_text = StringVar()
p = Label(self, justify=CENTER, compound=BOTTOM, textvariable=self.price_text)
p.pack()
#status Bar
status = Label(self, text="Waiting for file...", bd=1, relief=SUNKEN, anchor=W)
status.pack(side=BOTTOM, fill=X)
# root window created. Here, that would be the only window, but you can later have windows within windows.
root = Tk()
root.resizable(width=False,height=False);
root.geometry("220x300")
#creation of an instance
app = Window(root)
#mainloop
root.mainloop()
这是我得到的错误：
Traceback (most recent call last):
File "/Users/domagalski/Desktop/test.py", line 112, in <module>
app = Window(root)
File "/Users/domagalski/Desktop/test.py", line 20, in init
self.init_window()
File "/Users/domagalski/Desktop/test.py", line 95, in init_window
self.mass = self.value(self.get_filament_value(root.fileName))
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/tkinter/__init__.py", line 1939, in getattr
return getattr(self.tk, attr)
AttributeError: '_tkinter.tkapp' object has no attribute 'fileName'
答案 0 :(得分：0)
在init_window方法中，您正尝试访问root.fileName：
def init_window(self):
# ...
self.mass = self.value.set(self.get_filament_value(root.fileName))
# ...
root.fileName设置在read_gcode：
def read_gcode(self):
root.fileName = filedialog.askopenfilename(filetypes = (("GCODE files", "*.gcode"), ("All files", "*.*")))
# ...
但只有当用户点击按钮时才会调用read_gcode：
gcodeButton = Button(self, text="Load GCODE", command=self.read_gcode)
因为您需要用户单击加载GCODE 按钮才能获取文件名，所以您应该从self.mass = ...删除init_window代码：{{1 }}被调用，init_window尚不可用。将该代码移到root.fileName。
您遇到的另一个问题是，您要将read_gcode分配给self.mass返回的值self.value.set()。您应该使用None的返回值。
换句话说，改变这个：
self.get_filament_value()到此：
def get_filament_value(self, fileName):
# ...
if re_value:
value = float(re_value.group(1))
return('Volume of the print is {} cm3'.format(value))
else:
value = 0.0
return('Filament volume was not found in {}'.format(fileName))
return value
def read_gcode(self):
root.fileName = filedialog.askopenfilename(filetypes = (("GCODE files", "*.gcode"), ("All files", "*.*")))
self.value.set(self.get_filament_value(root.fileName))
def init_window(self):
# ...
self.value = StringVar()
l = Label(self, justify=CENTER, compound=BOTTOM, textvariable=self.value)
l.pack()
# self.mass = self.value.set(self.get_filament_value(root.fileName))
# int(self.mass)
# m = Label(self, justify=CENTER, compound=BOTTOM, textvariable=self.mass)
# m.pack()
# ...