PysimpleGUI Calc 没有正确使用函数

Question

嘿，每个人都摸不着头脑，试图弄清楚我的代码出了什么问题，它没有返回任何错误，它似乎只是跳过了计算部分并打印了我包含的错误消息以指示错误的用户输入，即使我的用户输入是有效的。

我尝试移动有关变量的 if 和定义语句，看看是否可行。

我知道变量首先定义在计算函数之上，然后又在函数中定义，我之所以这样做是因为否则我会得到一个错误，即它们是未定义的，除非它们首先出现在其他所有事物之上。

#Weight Converter Calculator with GUI

import PySimpleGUI as sg

def h():
    h = height
def g():
    g = diameter
    if g == 9:
        diameter = .7
    if g == 11:
        diameter == .4
    if g == 11.5:
        diameter = .38    
def u():
    u = typeunit
    if u == ft:
        typeunit = 1
    if u == rl:
        typeunit = 50
    if u == pl:
        typeunit = 450    
def a():
    a = amount

def calc_weight(h, g, u, a):
    try:
        h, g, u, a = float(h), float(g), float(u), float(a)
        h = height
        a = amount
        g = diameter
        u = typeunit
        if g == 9:
            g = .7
        if g == 11:
            g = .4
        if g == 11.5:
            g = .38
        if u == 'ft':
            u = 1
        if u == 'rl':
            u = 50
        if u == 'pl':
            u = 450
        weight = h * g * u * a
        if weight >= 47001:
            standard = 'too heavy for a truck! '
        elif weight <= 47000:
            standard = 'will fit onto a truck! '
    except (ValueError, ZeroDivisionError):
        return None
    else:
        return f'Weight: {weight}, {standard}'

layout = [
    
    [sg.Text('Please enter your desired Mesh Height, Gauge, Unit, Amount')],
    [sg.Text('Mesh Height in FT', size =(15, 1)), sg.Input(key = h)],
    [sg.Text('Gauge 9, 11, 11.5', size =(15, 1)), sg.Input(key = g)],
    [sg.Text('Unit "ft" for sq ft, "rl" for roll, and "pl" for pallet', size =(15, 3)), sg.Input(key = u)],
    [sg.Text('Amount', size =(15, 1)), sg.Input(key = a)],
    [sg.Text('', key='weight', size=(20, 2))],
    [sg.Submit(), sg.Cancel()]
]
 
window = sg.Window('Chain Link Weight Calculator', layout)
sg.theme('DarkAmber') 
while True:
    event, value = window.Read()
    if event == 'Submit':
        weight = calc_weight(value[h], value[g], value[u], value[a],)
        if weight:
            window.Element('weight').Update(weight, text_color='white')
        else:
            window.Element('weight').Update('Input is incorrect! ', text_color='red')
    elif event == 'Cancel':
        break
    
window.Close()

Answer 1

好像有些问题

• 使用函数名作为元素的键，如h、g、u和a，这些函数没用
• 变量height、amount、diameter和typeunit未在函数calc_weight中定义
• 变量h，g，u，a在函数中重置calc_weight

这里只是演示脚本，

import PySimpleGUI as sg

def find_true(sequence):
    return sequence.index(True)

def calc_weight(values):
    try:
        h, a = float(values['h']), float(values['a'])
        index1 = find_true([values[key] for key in ('G1', 'G2', 'G3')])
        index2 = find_true([values[key] for key in ('U1', 'U2', 'U3')])
        g, u = guages[index1], units[index2]
        weight = h*g*u*a
        standard = 'too heavy for a truck!' if weight>= 47001 else 'will fit onto a truck!'
        result = f'Weight: {weight}, {standard}'
    except:
        result = None
    return result

guages = [0.7, 0.4, 0.38]
units  = [1, 50, 450]

sg.theme('DarkAmber')

layout = [
    [sg.Text('Please enter your desired Mesh Height, Gauge, Unit, Amount')],
    [sg.Text('Mesh Height in FT', size =(15, 1)), sg.Input(key='h')],
    [sg.Text('Gauge', size=(15, 1)),
     sg.Radio("9", 'Guage', size=(8, 1), key='G1', default=True),
     sg.Radio("11", 'Guage', size=(8, 1), key='G2'),
     sg.Radio("11.5", 'Guage', size=(8, 1), key='G3'),],
    [sg.Text('Unit', size=(15, 1)),
     sg.Radio("sq ft", 'Unit', size=(8, 1), key='U1', default=True),
     sg.Radio("roll", 'Unit', size=(8, 1), key='U2'),
     sg.Radio("pallet", 'Unit', size=(8, 1), key='U3'),],
    [sg.Text('Amount', size =(15, 1)), sg.Input(key='a')],
    [sg.Text('', key='weight', size=(45, 2))],
    [sg.Submit(), sg.Cancel()]
]

window = sg.Window('Chain Link Weight Calculator', layout)

while True:

    event, values = window.Read()

    if event in (sg.WINDOW_CLOSED, 'Cancel'):
        break
    elif event == 'Submit':
        weight = calc_weight(values)
        if weight:
            window['weight'].update(weight, text_color='white')
        else:
            window['weight'].update('Input is incorrect!', text_color='white')

window.Close()