在python中连接变量

2024-03-29 04:56:56 发布

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我创建了一个变量colonne,它返回列的编号。你知道吗

我试着把它放在我的函数选择中,就像这样:

self.ids.image+colonne+_1

以下是我的完整观点:

Button:
    on_press: root.click_colonne(1)
    pos: 25,25
    size: 100, 500
    opacity:0
Image:
    source: 'image.png'
    pos: 0,0
    size: 150,150
    id: image1_1
Image:
    source: 'image.png'
    pos: 0,100
    size: 150,150
    id: image1_2
Image:
    source: 'image.png'
    pos: 0,200
    size: 150,150
    id: image1_3
Image:
    source: 'image.png'
    pos: 0,300
    size: 150,150
    id: image1_4
Image:
    source: 'image.png'
    pos: 0,400
    size: 150,150
    id: image1_5



Button:
    on_press: root.click_colonne(2)
    pos: 125,25
    size: 100, 500
    opacity:0
Image:
    source: 'image.png'
    pos: 100,0
    size: 150,150
    id: image2_1
Image:
    source: 'image.png'
    pos: 100,100
    size: 150,150
    id: image2_2
Image:
    source: 'image.png'
    pos: 100,200
    size: 150,150
    id: image2_3
Image:
    source: 'image.png'
    pos: 100,300
    size: 150,150
    id: image2_4
Image:
    source: 'image.png'
    pos: 100,400
    size: 150,150
    id: image2_5

下面是我的全部功能:

def click_colonne(self, colonne):
    if self.ids.image+colonne+_1.source == "image.png":
        self.ids.image+colonne+_1.source = "image_rouge.png"
    elif self.ids.image+colonne+_2.source == "image.png":
        self.ids.image+colonne+_2.source = "image_rouge.png"
    elif self.ids.image+colonne+_3.source == "image.png":
        self.ids.image+colonne+_3.source = "image_rouge.png"
    elif self.ids.image+colonne+_4.source == "image.png":
        self.ids.image+colonne+_4.source = "image_rouge.png"
    elif self.ids.image+colonne+_5.source == "image.png":
        self.ids.image+colonne+_5.source = "image_rouge.png"

这是错误

File "main.py", line 36
self.ids.image+colonne+_5.source = "image_rouge.png"
^
SyntaxError: can't assign to operator

有人能给我正确的语法吗?你知道吗


Tags: posimageselfididssourcesizepng
2条回答

下面是另一个在Python 3.6及更高版本中有效的解决方案:

def click_colonne(self, colonne):
    for i in range(1, 6):
        if self.ids[f"image{colone}_{i}"].source == "image.png":
            self.ids[f"image{colone}_{i}"].source = "image_rouge.png"
            break

f""替换.format()函数,允许您在引号内添加变量。你知道吗

连接不会生成变量名的格式,您只是添加它的值,而不能在运算符=。更好的选择是将名称构建为字符串,并通过ids字典使用它

self.ids["image{}_{}".format(colone, 5)].source = "image_rouge.png"

另一个解决办法是

getattr(self.ids, "image{}_{}".format(colone, 5)).source = "image_rouge.png"

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