Question

我是编程的新手，我的程序不是很好，但希望它没关系，因为我现在只使用它几天了。

我在课堂上遇到麻烦＆＃34; Recipie＆＃34;。在这个课程中，我无法在Entry小部件中保存文本。我知道要使用.get（）选项，但是当我尝试打印它时，它不会（无论是否在该定义的方法内）。这是我的主要关注点。我希望它在按下按钮时保存作为字符串输入的文本：b。

我的另一个小问题是，我该如何移动标签。当我尝试过时，我使用了高度和宽度选项，但这只是扩展了标签。我想移动文本以在我的条目框上方创建标题。标签是使用正确的小部件还是更容易使用消息框小部件？例如，它看起来像（但是像8个像素向下，20个向右）：

成分<BR/> 文本框
按钮标记为：添加成分

我不确定选项.pack（side =＆＃34; ...＆＃34;）或.place（anchor =＆＃34; ...＆＃34;）是正确的选择用于我的按钮或输入框或标签。

如果您可以在代码中添加注释来解释您的操作，那将非常有用。

import Tkinter
class Cookbook(Tkinter.Tk):
    def __init__(self):
        Tkinter.Tk.__init__(self)
        self.title("Cookbook")
        self.geometry("500x500+0+0")

        self.button = []
        for r in range(1):
            for c in range(1):
                b = Button(self).grid(row=r,column=c)
                self.button.append(b)

class Button(Tkinter.Button):
    def __init__(self,parent):
            b = Tkinter.Button.__init__(self, parent, text="Add A New Recipie", height=8, width=15, command=self.make_window)

    def make_window(self):
        popwindow = Recipie()
        popwindow.name()
        popwindow.ingredients()
        popwindow.addingredient()
        popwindow.savebutton()
        popwindow.save()

class Recipie(Tkinter.Tk):
    def __init__(self):
        Tkinter.Tk.__init__(self)
        self.title("New Recipie")
        self.geometry("500x500")

    def name(self):
        name = Tkinter.Label(self, text="Title:")
        name.pack() #used to be name.place(anchor="nw")

        self.insert_name = Tkinter.Entry(self) #edited with the answer below, used to be insert_name = Tkinter.Entry(self)
        self.insert_name.pack() #edited with the answer from below, used to be insert_name.pack()
        self.insert_name.focus_set() #edited with the answer from below, used to be insert_name.focus_set()

    def ingredients(self):
        self.e = Tkinter.Entry(self) #edited with the answer from below, used to be e.get()
        self.e.pack() #edited with the answer from below, used to be e.pack()
        self.e.focus_set() #edited with the answer from below, used to be e.focus_set()

    def addingredient(self):
        but = Tkinter.Button(self, text="Add Ingredients", width=15, command=self.ingredients)
        but.pack(side="bottom")

    def procedure(self):
        txt = Tkinter.Label(self, text="List the Steps:")
        txt.place(anchor="n")

        self.p = Tkinter.Entry(self) #edited with the answer from below, used to be p = Tkinter.Entry(self)
        self.p.place(anchor="nw") #edited with the answer from below, used to be p.place(anchor="nw")
        self.p.focus_set() #edited with the answer from below, used to be p.focus_set

    def savebutton(self):
        print self.insert_name.get() #edited with the answer from below
        print self.e.get() #edited with the answer from below
        print self.p.get() #edited with the answer from below

   def save(self):
         b = Tkinter.Button(self, text="Save Recipie", width=15,command=self.savebutton)
         b.pack()

top = Cookbook()
top.mainloop()

Answer 1

第1部分......

您当前正在将ingredients方法中的条目小部件定义为局部变量（即这些变量仅存在于方法内）。要维护对正在创建的条目小部件的引用，可以将其作为实例属性分配给Recipie对象。

即

e = Tkinter.Entry(self)
e.pack()
e.focus_set()

变为

self.e = Tkinter.Entry(self)
self.e.pack()
self.e.focus_set()

和

print e.get()

变为

print self.e.get()

继续使用Python之前需要阅读一些内容：

Python classes

Explaining 'self' in Python

第2部分......

因此，在回答有关如何定位标签的问题的第二部分时。看起来你需要改变你打包小部件的方式。如何打包条目小部件的一个例子是一种干净的方式（模仿你的例子的功能）将是：

import Tkinter as tk

class IngredientAdder(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self.geometry("500x500+0+0")
        self.init_gui()

    # function to add new ingredients
    def add_ingredient_entry(self):
        entry = tk.Entry(self)
        entry.pack(side=tk.TOP)
        self.ingredient_entries.append(entry)

    # get contents of all entry boxes
    def save_recipe(self):
        for ingredient in self.ingredient_entries:
            print ingredient.get()
        print "[Recipe saved]"

    # build initial widgets 
    def init_gui(self):

        # this is a list of ingredients entry boxes
        self.ingredient_entries = []

        # put a label at the top of the window and anchor it there
        tk.Label(self,text="Ingredients").pack(anchor=tk.N,side=tk.TOP)

        # Put these two buttons at the bottom of the window and anchor them there
        tk.Button(self,text="Save recipe",command=self.save_recipe).pack(anchor=tk.S,side=tk.BOTTOM)
        tk.Button(self,text="Add ingredient",command=self.add_ingredient_entry).pack(anchor=tk.S,side=tk.BOTTOM)

        # new ingredients will be added between the label and the buttons 
        self.add_ingredient_entry()

cookbook = IngredientAdder()
cookbook.mainloop()

Tkinter，Python：如何保存在Entry小部件中输入的文本？如何移动标签？

1 个答案: