你可以看看这个演示,让我知道为什么我无法加载 features = ["A","B","C"]
到 MyListView
?
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.base import runTouchApp
features = ["A","B","C"]
Builder.load_string("""
<MyListView>:
ListView:
item_strings: [str(index) for index in features]
""")
class MyListView(BoxLayout):
pass
if __name__ == '__main__':
runTouchApp(MyListView())
我收到了以下错误
消息文件名行位置跟踪21 init C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ uix \ boxlayout.py 102 init C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ uix \ layout.py 72 init C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ uix \ widget.py 320应用C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ lang . py 1970 _apply_rule C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ lang.py 2130“BuilderException:Parser:File”“”“,第4行:... 2 :: 3:ListView:4: item_strings:[str(index)for features in features] ... BuilderException:Parser:File“”“”,第4行:... 2 :: 3:ListView:4:item_strings:[str(index)for index in功能] ... NameError:名称'features'未定义文件“”C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ lang.py“”,第1742行,在create_handler中返回eval(value, idmap),bound_list文件“”“”,第4行,在文件“”C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ lang.py“”,第2115行,在_apply_rule rctx ['ids'中])文件“”C:\ Python27 \ ArcGIS10.4 \ lib \ site-packages \ kivy \ lang.py“”,l ine 1747,在create_handler cause = tb)“
1 回答
也许你的意思是:
如果你以前没有,我建议你阅读this .