Question

取代＆＃34; mbox = ?????????＆＃34;在def start_processing（self）部分中，如何将其作为已上载的文件。这是原始的硬编码，但已将其更改为文件上传？谢谢

class App:

def __init__(self, master):
    self.master = master

    # call start to initialize to create the UI elemets
    self.start()

def start(self):
    self.master.title("Extract Email Headers")

    self.now = datetime.datetime.now()

    # CREATE A TEXT/LABEL
    # create a variable with text
    label01 = "Please select the .mbox file you would like to analyse"
    # put "label01" in "self.master" which is the window/frame
    # then, put in the first row (row=0) and in the 2nd column     (column=1),
    # align it to "West"/"W"
    tkinter.Label(
        self.master, text=label01).grid(row=0, column=0, sticky=tkinter.W)

    # CREATE A TEXTBOX
    self.filelocation = tkinter.Entry(self.master)
    self.filelocation["width"] = 60
    self.filelocation.focus_set()
    self.filelocation.grid(row=1, column=0)

    # CREATE A BUTTON WITH "ASK TO OPEN A FILE"
    # see: def browse_file(self)
    self.open_file = tkinter.Button(
        self.master, text="Browse...", command=self.browse_file)
    # put it beside the filelocation textbox
    self.open_file.grid(row=1, column=1)



    # now for a button
    self.submit = tkinter.Button(
        self.master, text="Execute!", command=self.start_processing,
        fg="red")
    self.submit.grid(row=3, column=0)

def start_processing(self):
    date1= "Tue, 18 Jan 2015 15:00:37"
    date2="Wed, 23 Jan 2015 15:00:37"
    date1 = parser.parse(date1)
    date2 = parser.parse(date2)
    f = open("results.txt","w")
    mbox = ????????????????????
    count = 0

    for msg in mbox:
        pprint.pprint(msg._headers, stream = f)
        tempdate = parser.parse(msg['Date'])
        print(tempdate)


    f.close()
    print(count)
    pass

def browse_file(self):
    # put the result in self.filename
    self.filename = filedialog.askopenfilename(title="Open a file...")

    # this will set the text of the self.filelocation
    self.filelocation.insert(0, self.filename)

Answer 1

我假设您要将文件路径存储在StringVar中。 TK使用特殊的控制变量来为Entry对象提供功能。您可以通过调用函数tk.StringVar()来创建字符串控件变量。

您希望在初始化UI时创建变量，因此在start()方法中

    # CREATE A TEXTBOX
    self.filepath = tkinter.StringVar() # This will hold the value of self.filelocation
        # We set it to the "textvariable" option of the new entry
    self.filelocation = tkinter.Entry(self.master, textvariable=self.filepath)
    self.filelocation["width"] = 60
    self.filelocation.focus_set()
    self.filelocation.grid(row=1, column=0)

现在，当我们想要检索它的值时，我们使用get()方法。在start_processing()方法中：

    # Here it opens the file, but you may want to do something else
    mbox = open(self.filepath.get(),'r')

您可以更新browse_file()方法中设置值的方式，以便轻松使用控件变量。我们将设置控制变量的值，而不是直接插入输入框，它将在文本输入字段中自动更新。在browse_file()：

   # this will set the text of the self.filelocation
   self.filepath.set( self.filename )

现在，您可以按预期方式正确设置和检索self.filelocation的值。当然，您可以将self.filepath的名称更改为您想要的任何名称。

了解更多信息：

Answer 2

我不确定mbox是否应该是一个打开的文件，一个列表，一个元组或一些自定义对象。我打算假设它是一个打开的文件，因为你有一个选择文件名的功能。

如果是这种情况，您需要做的就是调用条目小部件的get方法来获取用户输入的内容：

mbox_name = self.filelocation.get()
mbox = open(mbox_name, "r")
for msg in mbox:
    ...

如何使浏览的文件成为进程的目标，而不是硬编码？

2 个答案: