Python tkinter 网格布局混淆了

Question

我是 Python 新手，因此是 Tkinter。对于第一个小项目，我正在尝试创建一个程序来编写 CSV 文件。程序在启动时获取文件名，检查文件的标题并动态创建必要数量的输入字段。

为了更容易继续，它会显示输入的最后一行。

目前我已经完成了一半，并显示了最后一行和正确数量的条目小部件。不幸的是，布局很垃圾。

Example

我希望标签位于条目小部件和底部的退出按钮前面。

有什么想法吗？

提前致谢。

# -*- coding: utf-8 -*-
import Tkinter as tk
import argparse
import time

parser = argparse.ArgumentParser()
parser.add_argument('filename', nargs=1, help="file to parse")
args = parser.parse_args()

filename = args.filename[0]


def get_headers(filename):
    with open(filename, 'r') as f:
        headers = f.readline()
    return(headers)


def file_len(filename):
    with open(filename) as f:
        for i, l in enumerate(f):
            pass
    return i, l


class Application(tk.Frame):

    def __init__(self, headers, filename, last_line, master=None):
        tk.Frame.__init__(self, master)
        self.grid()
        self.filename = filename
        lastentry = self.createWidgets(self.filename, headers, last_line)
        # print lastentry
        # print(lastentry[0].get()) # Test
        # lastentry[0].delete(0,tk.END) # Test
        # lastentry[0].insert(0,"Test") # Test

    def createWidgets(self, filename, headers, last_line):
        headers = get_headers(filename).split(',')  # .decode('utf8')
        self.lastentry = []
        self.entryfield = []
        self.label = tk.Label(self, text="CSV Entry Tool").grid(columnspan=3, pady=(0,10))
        for x, y in enumerate(headers):
            self.create_label_widget(x, y)
        for x, y in enumerate(last_line):
            self.lastentry.append(self.create_lastentry_widget(x, y))
        for x in range(len(last_line)):
            self.entryfield.append(self.create_entry_widget(x))

        self.lastlineLabel = tk.Label(self, text="Last Entry: ").grid(row=2, column=1, padx=(10,10), pady=(0,15))
        self.entryLabel = tk.Label(self, text="New Entry: ").grid(row=3, column=1, padx=(10,10), pady=(0,15))

        self.quitButton = tk.Button(self, text='Quit', command=self.quit)
        self.quitButton.grid(row=6, column=6)
        return self.lastentry


    def create_label_widget(self, x, y):
        new_widget = tk.Label(self.master, text=y).grid(row=1, column=x+1, padx=(10,10), pady=(0,15))
        return new_widget

    def create_entry_widget(self, x):
        new_widget = tk.Entry(self.master)
        new_widget.grid(row=3, column=x+1, padx=(10,10), pady=(0,15))
        return new_widget

    def create_lastentry_widget(self, x, y):
        new_widget = tk.Entry(self.master)
        new_widget.grid(row=2, column=x+1, padx=(10,10), pady=(0,15))
        new_widget.insert(1, y)
        new_widget.configure(state="readonly")
        return new_widget

headers = get_headers(filename).split(',')  # .decode('utf8')

print headers

# Check Filelengh and get back last line.
file_lengh, last_line = file_len(filename)
print("Einträge: ".decode('utf8')) + str(file_lengh)
last_line = last_line.split(',')
print last_line


app = Application(headers, filename, last_line)
app.master.title('Sample application')
app.mainloop()

Answer 1

您在 self 中创建标签和按钮，但在 self.master 中创建其他元素 - 因此它们可以位于具有自己网格的不同小部件中。

将self.master 更改为self 并将column=x+1 更改为column=x+2 后，我得到了

我还将var = Widget(...).grid(...) 更改为var = Widget(...) 和var.grid(...)

您应该使用csv 模块来读取数据，因为正确的 csv 行包含 3 列

 "a","b","(x,y)"

您阅读为 4 列。

\n 也有同样的问题

 "a","b","(x
 y)"

您的代码将其读取为 2 行，但它是正确的一行。

代码：

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

import Tkinter as tk
import argparse
import time

# --- classes ---

class Application(tk.Frame):

    def __init__(self, headers, filename, last_line, master=None):
        tk.Frame.__init__(self, master)
        self.grid()
        self.filename = filename
        lastentry = self.createWidgets(self.filename, headers, last_line)
        # print lastentry
        # print(lastentry[0].get()) # Test
        # lastentry[0].delete(0,tk.END) # Test
        # lastentry[0].insert(0,"Test") # Test

    def createWidgets(self, filename, headers, last_line):
        headers = get_headers(filename).split(',')  # .decode('utf8')

        self.lastentry = []
        self.entryfield = []

        self.label = tk.Label(self, text="CSV Entry Tool")
        self.label.grid(columnspan=3, pady=(0,10))

        for x, y in enumerate(headers):
            self.create_label_widget(x, y)

        for x, y in enumerate(last_line):
            self.lastentry.append(self.create_lastentry_widget(x, y))

        for x in range(len(last_line)):
            self.entryfield.append(self.create_entry_widget(x))

        self.lastlineLabel = tk.Label(self, text="Last Entry: ")
        self.lastlineLabel.grid(row=2, column=1, padx=(10,10), pady=(0,15))

        self.entryLabel = tk.Label(self, text="New Entry: ")
        self.entryLabel.grid(row=3, column=1, padx=(10,10), pady=(0,15))

        self.quitButton = tk.Button(self, text='Quit', command=self.quit)
        self.quitButton.grid(row=6, column=4)

        return self.lastentry


    def create_label_widget(self, x, y):
        new_widget = tk.Label(self, text=y)
        new_widget.grid(row=1, column=x+2, padx=(10,10), pady=(0,15))
        return new_widget

    def create_entry_widget(self, x):
        new_widget = tk.Entry(self)
        new_widget.grid(row=3, column=x+2, padx=(10,10), pady=(0,15))
        return new_widget

    def create_lastentry_widget(self, x, y):
        new_widget = tk.Entry(self)
        new_widget.grid(row=2, column=x+2, padx=(10,10), pady=(0,15))
        new_widget.insert(1, y)
        new_widget.configure(state="readonly")
        return new_widget

# --- functions ---

def get_headers(filename):
    with open(filename, 'r') as f:
        headers = f.readline()
    return(headers)

def file_len(filename):
    with open(filename) as f:
        for i, l in enumerate(f):
            pass
    return i, l

# --- main ---

parser = argparse.ArgumentParser()
parser.add_argument('filename', nargs=1, help="file to parse")
args = parser.parse_args()

filename = args.filename[0]

headers = get_headers(filename).split(',')  # .decode('utf8')

print headers

# Check Filelengh and get back last line.
file_lengh, last_line = file_len(filename)
print("Eintrage: ".decode('utf8')) + str(file_lengh)
last_line = last_line.split(',')
print last_line

app = Application(headers, filename, last_line)
app.master.title('Sample application')
app.mainloop()