def SetupGUI(self):
with self.container(name='root'):
with self.container():
for i in range(0,8):
self.AddWidget(name='button%i' % i, type='button')
with self.container():
for i in range(0,8):
self.AddWidget(name='slider%i' % i, type='slider')
如您所见，嵌套从缩进中清晰可见，无需手动推送和弹出。
This sort of situation -- where you have a pair of opposite operations -- calls for a context manager. Instead of explicitly pushing and popping container widgets onto/from a stack, you would wrap the children of the container in a with block. Building on top of the code you've shown here, this could be implemented as something like
def SetupGUI(self):
with self.container(name='root'):
with self.container():
for i in range(0,8):
self.AddWidget(name='button%i' % i, type='button')
with self.container():
for i in range(0,8):
self.AddWidget(name='slider%i' % i, type='slider')
As you can see, the nesting is clear from the indentation, and there's no need to manually push and pop.
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评论（1）
这种情况——有一对相反的操作——需要上下文经理。您无需将容器小部件显式推入堆栈或从堆栈中弹出，而是将容器的子级包装在
with块中。基于您在此处显示的代码，这可以实现为类似的内容（< 的文档代码>contextlib.contextmanager）。
您的
SetupGUI方法将变为：如您所见，嵌套从缩进中清晰可见，无需手动推送和弹出。
This sort of situation -- where you have a pair of opposite operations -- calls for a context manager. Instead of explicitly pushing and popping container widgets onto/from a stack, you would wrap the children of the container in a
withblock. Building on top of the code you've shown here, this could be implemented as something like(Documentation for
contextlib.contextmanager).Your
SetupGUImethod then becomes:As you can see, the nesting is clear from the indentation, and there's no need to manually push and pop.