ParameterList不支持slice

[wangguan1995]

bug描述 Describe the Bug

Paddle:

b107776

Device:

NVIDIA A100 40GB

Cuda:

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2022 NVIDIA Corporation
Built on Tue_Mar__8_18:18:20_PST_2022
Cuda compilation tools, release 11.6, V11.6.124
Build cuda_11.6.r11.6/compiler.31057947_0

Bug:

按照官方文档，ParameterList和python内置List的行为一致

import paddle

class MyLayer(paddle.nn.Layer):
    def __init__(self, num_stacked_param):
        super().__init__()
        # create ParameterList with iterable Parameters
        self.params = paddle.nn.ParameterList(
            [paddle.create_parameter(
                shape=[2, 2], dtype='float32')] * num_stacked_param)

    def forward(self, x):
        for i, p in enumerate(self.params):
            tmp = self._helper.create_variable_for_type_inference('float32')
            self._helper.append_op(
                type="mul",
                inputs={"X": x,
                        "Y": p},
                outputs={"Out": tmp},
                attrs={"x_num_col_dims": 1,
                        "y_num_col_dims": 1})
            x = tmp
        return x

x = paddle.uniform(shape=[5, 2], dtype='float32')
num_stacked_param = 4
model = MyLayer(num_stacked_param)
print(len(model.params))
res = model(x)
print(res.shape)

replaced_param = paddle.create_parameter(shape=[2, 3], dtype='float32')
model.params[num_stacked_param - 1] = replaced_param  # replace last param
res = model(x)
print(res.shape)
model.params.append(paddle.create_parameter(shape=[3, 4], dtype='float32'))  # append param
print(len(model.params))
res = model(x)
print(res.shape)

# here
print(model.params[:])

Log

grep: warning: GREP_OPTIONS is deprecated; please use an alias or script
W0618 05:17:49.387017 142075 gpu_resources.cc:119] Please NOTE: device: 0, GPU Compute Capability: 8.0, Driver API Version: 12.0, Runtime API Version: 11.6
W0618 05:17:49.393265 142075 gpu_resources.cc:164] device: 0, cuDNN Version: 8.4.
4
[5, 2]
[5, 3]
5
[5, 4]
Traceback (most recent call last):
  File "/workspace/wangguan/gino_paddle_ahmed/gino/src/neuralop/models/test_PaddleParameterList.py", line 39, in <module>
    print(model.params[:])
  File "/root/miniconda3/envs/gino_conda/lib/python3.9/site-packages/paddle/nn/layer/container.py", line 365, in __getitem__
    return self._parameters[str(idx)]
KeyError: 'slice(None, None, None)'

其他补充信息 Additional Supplementary Information

No response

[LokeZhou]

可以用这个https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/index_select_cn.html#index-select

[wangguan1995]

可以用这个https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/index_select_cn.html#index-select

感谢，另外发现，如果给slice套一层tuple

slice = tuple(slice)

idea from : @lijialin03