【发布时间】：2016-05-17 01:46:39
【问题描述】：
已解决 - 找到答案 @How to take input from Tkinter
ONE GOTCHA - 我尝试在已解决的链接中复制示例的样式，尽管我保留了一些自己的格式。我发现如果获取返回值的对象是在创建时添加了任何其他点，例如放置 .pack() 或在我的情况下是 .grid() 在创建对象的同一行，当您尝试将变量传回时，它会抛出一个错误。所以，继续使用第二行到 .pack() 或 .grid()。
原帖
我有一个在命令行上运行良好的程序，我正在尝试给它一个 GUI。不幸的是，我仍然对如何在界面中使用函数/方法/命令感到困惑。
我的示例是在获得用户输入后使用按钮让所有内容滚动。在命令行程序中，它是作为变量传递给一个函数并返回三个其他变量的用户输入。这三个变量被传递给另一个函数以提供结果，然后将结果格式化以显示。
好吧，我正在尝试使用 tkinter。我有一个输入字段，它将用户输入分配给一个变量。我有一个链接到一个函数的按钮，该函数用于启动球滚动......我不知道如何将该变量发送到所需的函数，或者如何获取返回的变量并应用它。在我的具体示例中，我想将变量“notation”发送到函数“parse()”，“parse()”的输出将发送到“roll()”，“roll()”的输出发送到变量“输出”，然后显示。所有这一切都将使用带有“command=calculate”的按钮开始，“calculate()”是一个让整个球滚动的函数。
非常抱歉...我完全是自学成才的，而且我确信我什至没有使用正确的术语来解决很多问题。我也明白这个例子不是很pythonic - 我最终会将所有这些放入类中并将函数更改为方法，但现在我只想看到它工作。
这是目前为止的代码。公平的警告，这不是我遇到的唯一问题......我只想坚持一个问题，直到我能解决它。
#!/usr/bin/env python
from tkinter import *
from tkinter import ttk
import re
import random
# Parsing function from the original command line tool
# Turns dice notation format into useful variables
def parse(d):
dice, dtype_mod = d.split('d')
dnum = 1
dtype = 6
mod = 0
if dtype_mod:
if '-' in dtype_mod:
dtype, mod = dtype_mod.split('-')
mod = -1 * int(mod)
elif '+' in dtype_mod:
dtype, mod = dtype_mod.split('+')
mod = int(mod)
else:
dtype = dtype_mod
if not dtype: dtype = 6
if not mod: mod = 0
return (int(dice), int(dtype), int(mod))
# Rolling function from the original command line tool
# 'print()' will be changed into a variable, with the output
# appended in the working version.
def roll(a, b):
rolls = []
t = 0
for i in range(a):
rolls.append(random.randint(1, b))
t += int(rolls[i])
print(('Roll number %d is %s, totaling %d') % (i + 1, rolls[i], t))
return (int(t))
# Placeholder - the rest of the command line code will be used here later
# This code will be what starts everything rolling.
# For debugging, attempting to pass a variable, doing it wrong.
def calculate():
output = "this is something different"
return output
# Initialize
dice = Tk()
dice.title('Roll the Dice')
dice.geometry("800x600+20+20")
# Drawing the main frame
mainframe = ttk.Frame(dice, padding="3 3 12 12")
mainframe.grid(column=0, row=0, sticky=(N, W, E, S))
mainframe.columnconfigure(0, weight=1)
mainframe.rowconfigure(0, weight=1)
# Variables needed for program and widgets
random.seed()
notation = ""
output = """This is
an example of a lot of crap
that will be displayed here
if I ever get
this to work
and this is a really long line -Super Cali Fragil Istic Expi Ali Docious
"""
# Dice notation entry field, and it's label
notation_entry = ttk.Entry(mainframe, width=10, textvariable=notation)
notation_entry.grid(column=2, row=1)
ttk.Label(mainframe, text="Dice").grid(column=1, row=1)
# Section used for output
"""Huge laundry list of problems here:
1. textvariable is not displaying anything here. If I change it to text
it seems to work, but from what I can tell, that will not update.
2. I would love for it to have a static height, but height is not allowed here.
Need to figure out a workaround.
3. Also, have not figured out how to get the value returned by calculate()
to show up in here when the button is pressed..."""
output_message = Message(mainframe, textvariable=output, width= 600)
output_message.grid(column=1, row=2, rowspan=3, columnspan=3)
# The 'make it go' button.
"""Can I pass the function a variable?"""
ttk.Button(mainframe, text="Roll!", command=calculate).grid(column=3, row=5)
# This is a bunch of stuff from the command line version of this program.
# Only here for reference
"""while True:
notation = raw_input('Please input dice notation or q to quit: ')
if notation == "q":
raise SystemExit
else:
print(notation)
numbers = parse(notation)
(dice, dtype, mod) = numbers
total = roll(dice, dtype)
total += mod
print('Your total is %d' % total)"""
dice.mainloop()
【问题讨论】：