简单的python程序阅读。gcode文件

我对Python完全陌生，我想创建一个简单的脚本，在文件中为我找到一个特定的值，然后用它执行一些计算

所以我有一个.gcode文件（对于一台3D打印机来说，这是一个有数千行的文件，但它可以被任何简单的文本编辑器打开）。我想创建一个简单的Python程序，当您启动它时，简单的GUI会打开，按钮会要求您选择一个.gcode文件。然后在文件被打开后，我想让程序找到具体的行

)；所用灯丝=22900.5mm（55.1cm3）

（以上是文件中行的精确格式）并从中提取值55.1。稍后我想用这个值做一些简单的计算。到目前为止，我已经制作了一个简单的GUI和一个带有“打开文件”选项的按钮，但是我一直在研究如何从这个文件中获取这个值作为一个数字（以便在以后的公式中使用）

我希望我已经解释清楚了我的问题，以便有人能帮助我：）提前谢谢你的帮助

到目前为止，我的代码是：

from tkinter import *
import re




# 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()

    #Creation of init_window
def init_window(self):

        # changing the title of our master widget      
self.master.title("Used 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)

        # 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)

        #added "file" to our menu
menu.add_cascade(label="File", menu=file)

        #Creating the button
quitButton = Button(self, text="Load GCODE",command=self.read_gcode)
quitButton.place(x=0, y=0)

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))
else:
print 'filament not found in {}'.format(root.fileName)
value = 0.0
return value

print get_filament_value('test.gcode') 

def read_gcode(self):
root.fileName = filedialog.askopenfilename( filetypes = ( ("GCODE files", "*.gcode"),("All files", "*.*") ) )
self.value = self.get_filament_value(root.fileName)

def client_exit(self):
exit()





# root window created. Here, that would be the only window, but
# you can later have windows within windows.
root = Tk()

root.geometry("400x300")

#creation of an instance
app = Window(root)

#mainloop 
root.mainloop()  

---

您可以使用正则表达式在gcode文件中查找匹配行。下面的函数加载整个gcode文件并执行搜索。如果找到该值，该值将以浮点形式返回

import re

def get_filament_value(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))
        else:
            print('filament not found in {}'.format(filename))
            value = 0.0
        return value

print(get_filament_value('test.gcode'))

您的文件应显示以下内容：

55.1

因此，您的原始代码如下所示：

from tkinter import *
import re

# 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()

    #Creation of init_window
    def init_window(self):

        # changing the title of our master widget      
        self.master.title("Used 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)

        # 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)

        #added "file" to our menu
        menu.add_cascade(label="File", menu=file)

        #Creating the button
        quitButton = Button(self, text="Load GCODE",command=self.read_gcode)
        quitButton.place(x=0, y=0)

    # 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))
                print('filament value is {}'.format(value))
            else:
                value = 0.0
                print('filament not found in {}'.format(fileName))
        return value

    def read_gcode(self):
        root.fileName = filedialog.askopenfilename(filetypes = (("GCODE files", "*.gcode"), ("All files", "*.*")))
        self.value = self.get_filament_value(root.fileName)

    def client_exit(self):
        exit()

# root window created. Here, that would be the only window, but
# you can later have windows within windows.
root = Tk()

root.geometry("400x300")

#creation of an instance
app = Window(root)

#mainloop 
root.mainloop() 

---

这将把结果作为一个浮点数保存到一个名为

value

的类变量中，谢谢您的快速回答！它看起来不错，我马上就用。我不确定一件事，但是，如何连接这个位，你写的文件，将上传时，你使用按钮。因为在这个程序中，不同的文件将使用不同的名称。因此，您编写的这个函数必须读取以前选择的文件。或者可能是这样，但我不明白？你传递了你想要的文件名，这样你就可以传递

root.filename

例如。我用新的代码编辑了我的主要问题，我用你的建议更新了这些代码，但我得到了这样一条消息：“应该是缩进块”当我运行它时，代码中可能混合了制表符和空格，请从每行中删除所有前导字符并重新填充它们。另外，您可能希望通过添加

self

作为第一个参数，并将其称为

self.get\u value（）

Ok，将我的函数更改为类的成员函数。我再次编辑了代码（更改在第一篇文章中），但仍然收到了此消息。我真的很抱歉，但我是Python（以及一般的编码）的超级初学者