python - python函数参数的用例
问题描述
我有一个grids()
在参数中使用关键字 self 命名的 python 函数,以及另一个名为build_targets()
. 我想使用gridsize
and anchor_vec
fromgrids()
到另一个名为build_targets()
. 这两个功能如下:
def grids(self, img_size=(608,608), gridsize=(19, 19), device='cpu', type=torch.float32):
nx, ny = gridsize # x and y grid size
self.nx = nx
self.ny = ny
if isinstance(img_size, int):
self.img_size = int(img_size)
else:
self.img_size = max(img_size)
self.stride = self.img_size / max(gridsize)
yv, xv = torch.meshgrid([torch.arange(ny), torch.arange(nx)])
self.register_buffer('grid_xy', torch.stack((xv, yv), 2).view((1, 1, ny, nx, 2)).to(device))
self.anchor_vec = self.anchors.to(device) / self.stride
self.register_buffer('gridsize',torch.Tensor(gridsize).to(device))
def build_targets(model, targets):
for i in layers_list:
ng, anchor_vec = gridsize, anchor_vec # from grids()
有什么方法可以使用gridsize
和anchor_vec
inbuild_targets()
或者我如何在build_target()
函数中调用它?
任何意见将不胜感激!
解决方案
似乎是类grids()
中的方法,那么您有两种选择:
- 修改
build_targets()
,通过添加self
其参数使其成为类中的方法:
class SomeClass:
def grids(...):
self.gridsize = gridsize # (*)
#some code
def build_targets(self, model, targets):
for i in layers_list:
ng, anchor_vec = self.gridsize, self.anchor_vec # requires (*)
# or
ng, anchor_vec = (self.nx, self.ny), self.anchor_vec # does not requires (*)
来电:
some_instance.build_targets(some_model, some_targets)
- 添加更多参数到
build_targets()
:
def build_targets(model, targets, gridsize, anchor_vec):
for i in layers_list:
ng, anchor_vec = gridsize, anchor_vec
来电:
build_targets(some_model, some_targets, (some_instance.nx, some_instance.ny), some_instance.anchor_vec)
# quite long line
通过这种方式,build_targets()
对类是“独立的”。这样做相当于build_targets()
搬出班级。