fix the api docs (#619)

* Update stargan.md

* fix the paddle_type

* add docs

* add docs

* add acknowledge

* fix the docs

* fix the docs

docs/pytorch_project_convertor/API_docs/loss/README.md

 ## Loss类API映射列表
 该文档梳理了计算loss相关的PyTorch-PaddlePaddle API映射列表。
+
 | 序号 | PyTorch API                                                  | PaddlePaddle API                                             | 备注                                                         |
 | ---- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
 | 1    | [torch.nn.L1Loss](https://pytorch.org/docs/stable/generated/torch.nn.L1Loss.html?highlight=l1loss#torch.nn.L1Loss) | [paddle.nn.L1Loss](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/nn/loss/L1Loss_cn.html#l1loss) | 功能一致，PyTroch存在废弃参数`size_average`和`reduce`。      |

docs/pytorch_project_convertor/API_docs/ops/README.md

@@ -91,8 +91,8 @@
 | 86   | [torch.max](https://pytorch.org/docs/stable/generated/torch.max.html?highlight=max#torch.max) | [paddle.max](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/max_cn.html#max) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 87   | [torch.min](https://pytorch.org/docs/stable/generated/torch.min.html?highlight=min#torch.min) | [paddle.min](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/min_cn.html#min) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 88   | [torch.square](https://pytorch.org/docs/stable/generated/torch.square.html?highlight=square#torch.square) | [paddle.square](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/square_cn.html#square) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
-| 89   | [torch.sub](https://pytorch.org/docs/stable/generated/torch.sub.html?highlight=sub#torch.sub) | [paddle.subtract](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/subtract_cn.html#subtract) | [差异对比](./torch.sub.md)                                     |
-| 90   | [torch.subtract](https://pytorch.org/docs/stable/generated/torch.subtract.html?highlight=subtract#torch.subtract) | [paddle.subtract](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/subtract_cn.html#subtract) | [差异对比](./torch.subtract.md)                                |
+| 89   | [torch.sub](https://pytorch.org/docs/stable/generated/torch.sub.html?highlight=sub#torch.sub) | [paddle.subtract](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/subtract_cn.html#subtract) | [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.sub.md)                                     |
+| 90   | [torch.subtract](https://pytorch.org/docs/stable/generated/torch.subtract.html?highlight=subtract#torch.subtract) | [paddle.subtract](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/subtract_cn.html#subtract) | [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.subtract.md)                                |
 | 91   | [torch.tanh](https://pytorch.org/docs/stable/generated/torch.tanh.html?highlight=tanh#torch.tanh) | [paddle.tanh](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/tanh_cn.html#tanh) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 92   | [torch.true_divide](https://pytorch.org/docs/stable/generated/torch.true_divide.html?highlight=true_divide#torch.true_divide) | [paddle.divide](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/divide_cn.html#divide) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 93   | [torch.dist](https://pytorch.org/docs/stable/generated/torch.dist.html?highlight=dist) | [paddle.dist](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/dist_cn.html#dist) | 功能一致，参数名不一致                                       |
@@ -102,11 +102,11 @@
 | 97   | [torch.norm](https://pytorch.org/docs/stable/generated/torch.norm.html?highlight=norm#torch.norm) | [paddle.norm](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/norm_cn.html#norm) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor以及`dtype`参数代表输出Tensor类型 |
 | 98   | [torch.prod](https://pytorch.org/docs/stable/generated/torch.prod.html?highlight=prod#torch.prod) | [paddle.prod](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/prod_cn.html#prod) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 99   | [torch.std](https://pytorch.org/docs/stable/generated/torch.std.html?highlight=std#torch.std) | [paddle.std](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/std_cn.html#std) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
-| 100  | [torch.std_mean](https://pytorch.org/docs/stable/generated/torch.std_mean.html?highlight=std_mean#torch.std_mean) | 无对应实现                                                   | [组合实现](./torch.std_mean.md)                                |
+| 100  | [torch.std_mean](https://pytorch.org/docs/stable/generated/torch.std_mean.html?highlight=std_mean#torch.std_mean) | 无对应实现                                                   | [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.std_mean.md)                                |
 | 101  | [torch.sum](https://pytorch.org/docs/stable/generated/torch.sum.html?highlight=sum#torch.sum) | [paddle.sum](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/sum_cn.html#sum) | 功能一致，参数名不一致                                       |
-| 102  | [torch.unique](https://pytorch.org/docs/stable/generated/torch.unique.html?highlight=unique#torch.unique) | [paddle.unique](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/unique_cn.html#unique) | [差异对比](./torch.unique.md)                                  |
+| 102  | [torch.unique](https://pytorch.org/docs/stable/generated/torch.unique.html?highlight=unique#torch.unique) | [paddle.unique](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/unique_cn.html#unique) | [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.unique.md)                                  |
 | 103  | [torch.var](https://pytorch.org/docs/stable/generated/torch.var.html?highlight=var#torch.var) | [paddle.var](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/var_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
-| 104  | [torch.var_mean](https://pytorch.org/docs/stable/generated/torch.var_mean.html?highlight=var_mean#torch.var_mean) | 无对应实现                                                   | [组合实现](./torch.var_mean.md)                                |
+| 104  | [torch.var_mean](https://pytorch.org/docs/stable/generated/torch.var_mean.html?highlight=var_mean#torch.var_mean) | 无对应实现                                                   | [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.var_mean.md)                                |
 | 105  | [torch.allclose](https://pytorch.org/docs/stable/generated/torch.allclose.html?highlight=allclose#torch.allclose) | [paddle.allclose](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/allclose_cn.html) | 功能一致，参数名不一致                                       |
 | 106  | [torch.argsort](https://pytorch.org/docs/stable/generated/torch.argsort.html?highlight=argsort#torch.argsort) | [paddle.argsort](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/argsort_cn.html) | 功能一致，参数名不一致                                       |
 | 107  | [torch.eq](https://pytorch.org/docs/stable/generated/torch.eq.html?highlight=eq#torch.eq) | [paddle.equal](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/equal_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
@@ -116,7 +116,7 @@
 | 111  | [torch.isfinite](https://pytorch.org/docs/stable/generated/torch.isfinite.html?highlight=isfinite#torch.isfinite) | [paddle.isfinite](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/isfinite_cn.html) | 功能一致，参数名不一致                                       |
 | 112  | [torch.isinf](https://pytorch.org/docs/stable/generated/torch.isinf.html?highlight=isinf#torch.isinf) | [paddle.isinf](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/isinf_cn.html) | 功能一致，参数名不一致                                       |
 | 113  | [torch.isnan](https://pytorch.org/docs/stable/generated/torch.isnan.html?highlight=isnan#torch.isnan) | [paddle.isnan](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/isnan_cn.html) | 功能一致，参数名不一致                                       |
-| 114  | [torch.kthvalue](https://pytorch.org/docs/stable/generated/torch.kthvalue.html?highlight=kthvalue#torch.kthvalue) | 无对应实现                                                   | [组合实现](./torch.kthvalue.md)                              |
+| 114  | [torch.kthvalue](https://pytorch.org/docs/stable/generated/torch.kthvalue.html?highlight=kthvalue#torch.kthvalue) | 无对应实现                                                   | [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.kthvalue.md)                              |
 | 115  | [torch.le](https://pytorch.org/docs/stable/generated/torch.le.html?highlight=le#torch.le) | [paddle.less_equal](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/less_equal_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 116  | [torch.lt](https://pytorch.org/docs/stable/generated/torch.lt.html?highlight=lt#torch.lt) | [paddle.less_than](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/less_than_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 117  | [torch.maximum](https://pytorch.org/docs/stable/generated/torch.maximum.html?highlight=max#torch.maximum) | [paddle.maximum](https://www.paddlepaddle.org.cn/documentation/docs/zh/2.0/api/paddle/tensor/math/maximum_cn.html#cn-api-paddle-tensor-maximum) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
@@ -127,12 +127,12 @@
 | 122  | [torch.cross](https://pytorch.org/docs/stable/generated/torch.cross.html?highlight=cross#torch.cross) | [paddle.cross](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/cross_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 123  | [torch.any](https://pytorch.org/docs/stable/generated/torch.any.html?highlight=any#torch.any) | [paddle.any](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/any_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 124  | [torch.cumsum](https://pytorch.org/docs/stable/generated/torch.cumsum.html?highlight=cumsum#torch.cumsum) | [paddle.cumsum](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/cumsum_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
-| 125  | [torch.diag](https://pytorch.org/docs/stable/generated/torch.diag.html?highlight=diag#torch.diag) | [paddle.diag](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/diag_cn.html) |          [差异对比](./torch.diag.md)                                                     |
+| 125  | [torch.diag](https://pytorch.org/docs/stable/generated/torch.diag.html?highlight=diag#torch.diag) | [paddle.diag](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/diag_cn.html) |          [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.diag.md)                                                     |
 | 126  | [torch.diag_embed](https://pytorch.org/docs/stable/generated/torch.diag_embed.html?highlight=diag_embed#torch.diag_embed) | [paddle.nn.functional.diag_embed](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/nn/functional/diag_embed_cn.html) | 功能一致                                                     |
 | 127  | [torch.einsum](https://pytorch.org/docs/stable/generated/torch.einsum.html?highlight=einsum#torch.einsum) | paddlenlp.ops.einsum                                         | 功能一致，需要安装[paddlenlp](https://github.com/PaddlePaddle/PaddleNLP#pip%E5%AE%89%E8%A3%85) |
 | 128  | [torch.flatten](https://pytorch.org/docs/stable/generated/torch.flatten.html?highlight=flatten#torch.flatten) | [paddle.flatten](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/flatten_cn.html) | 功能一致，参数名不一致                                       |
 | 129  | [torch.flip](https://pytorch.org/docs/stable/generated/torch.flip.html?highlight=flip#torch.flip) | [paddle.flip](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/flip_cn.html) | 功能一致，参数名不一致                                       |
-| 130  | [torch.rot90](https://pytorch.org/docs/stable/generated/torch.rot90.html?highlight=rot90#torch.rot90) | 无对应实现                                                   |            [组合实现](./torch.rot90.md)                                             |
+| 130  | [torch.rot90](https://pytorch.org/docs/stable/generated/torch.rot90.html?highlight=rot90#torch.rot90) | 无对应实现                                                   |            [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.rot90.md)                                             |
 | 131  | [torch.meshgrid](https://pytorch.org/docs/stable/generated/torch.meshgrid.html?highlight=meshgrid#torch.meshgrid) | [paddle.meshgrid](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/meshgrid_cn.html) | 功能一致                                                     |
 | 132  | [torch.roll](https://pytorch.org/docs/stable/generated/torch.roll.html?highlight=roll#torch.roll) | [paddle.roll](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/roll_cn.html) | 功能一致，参数名不一致                                       |
 | 133  | [torch.tril](https://pytorch.org/docs/stable/generated/torch.tril.html?highlight=tril#torch.tril) | [paddle.tril](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/tril_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
@@ -141,5 +141,8 @@
 | 136  | [torch.cholesky](https://pytorch.org/docs/stable/generated/torch.cholesky.html?highlight=cholesky#torch.cholesky) | [paddle.cholesky](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/cholesky_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 137  | [torch.dot](https://pytorch.org/docs/stable/generated/torch.dot.html?highlight=dot#torch.dot) | [paddle.dot](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/dot_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
 | 138  | [torch.inverse](https://pytorch.org/docs/stable/generated/torch.inverse.html?highlight=inverse#torch.inverse) | [paddle.inverse](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/inverse_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
+| 139  | [torch.trace](https://pytorch.org/docs/stable/generated/torch.trace.html?highlight=trace#torch.trace) | [paddle.trace](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/trace_cn.html) |   [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.trace.md)                                                           |
+| 140  | [torch.addmv](https://pytorch.org/docs/stable/generated/torch.addmv.html?highlight=addmv#torch.addmv) | 无对应实现               |          [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.addmv.md)                                                     |
+
 
 ***持续更新...***

docs/pytorch_project_convertor/API_docs/ops/torch.addmv.md

+## torch.addmv
+### [torch.addmv](https://pytorch.org/docs/stable/generated/torch.addmv.html?highlight=addmv#torch.addmv)
+```python
+torch.addmv(input, mat, vec, beta=1, alpha=1, out=None)
+```
+
+###  功能介绍
+用于实现矩阵（`mat`）与向量（`vec`）相乘，再加上输入（`input`），PaddlePaddle目前无对应API，可使用如下代码组合实现该API。
+
+```python
+import paddle
+
+def addmv(input, mat, vec, beta=1, alpha=1, out=None):
+    mv = alpha * paddle.matmul(mat, vec)
+    input = beta * input
+    out = mv + input
+    return out
+```
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.trace.md

+## torch.trace
+### [torch.trace](https://pytorch.org/docs/stable/generated/torch.trace.html?highlight=trace#torch.trace)
+```python
+torch.trace(input) 
+```
+### [paddle.trace](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/trace_cn.html)
+```python
+paddle.trace(x, offset=0, axis1=0, axis2=1, name=None)
+```
+
+### 参数差异
+| PyTorch       | PaddlePaddle | 备注                                                   |
+| ------------- | ------------ | ------------------------------------------------------ |
+| input           | x            | 表示输入的Tensor。               |
+| -        | offset            | 2D-Tensor中获取对角线的位置，默认值为0，即主对角线，PyTorch无此参数。                  |
+| -           |axis1            | 当输入的Tensor维度大于2D时，获取对角线的二维平面的第一维，PyTorch无此参数。               |
+| -        | axis2            | 当输入的Tensor维度大于2D时，获取对角线的二维平面的第二维，PyTorch无此参数。                   |
+
+### 代码示例
+``` python
+# PyTorch示例：
+import torch
+x = torch.arange(1., 10.).view(3, 3)
+# 输入：
+# tensor([[1., 2., 3.],
+#         [4., 5., 6.],
+#         [7., 8., 9.]])
+out = torch.trace(x)
+# 输出：
+# tensor(15.)
+```
+
+``` python
+# PaddlePaddle示例：
+import paddle
+x = paddle.arange(1., 10.).reshape([3, 3])
+# 输入：
+# Tensor(shape=[3, 3], dtype=int64, place=CUDAPlace(0), stop_gradient=True,
+#        [[1, 2, 3],
+#         [4, 5, 6],
+#         [7, 8, 9]])
+out0 = paddle.trace(x)
+# 输出out0：
+# Tensor(shape=[1], dtype=int64, place=CUDAPlace(0), stop_gradient=True,
+#        [15])
+out1 = paddle.trace(x, offset=1)
+# 输出out1：
+# Tensor(shape=[1], dtype=int64, place=CUDAPlace(0), stop_gradient=True,
+#        [8])
+```
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.unique.md

@@ -34,7 +34,6 @@ paddle.unique(x, return_index=False, return_inverse=False, return_counts=False,
 ``` python
 # PyTorch示例：
 import torch
-import torch
 x = torch.tensor([[[1, 3], [2, 3]], [[1, 6], [2, 3]]], dtype=torch.float32)
 output, inverse_indices, counts = torch.unique(x, 
                       sorted=True, 

docs/pytorch_project_convertor/API_docs/utils/README.md

 ## 工具类API映射列表
 该文档梳理了与数据处理、分布式处理等相关的PyTorch-PaddlePaddle API映射列表。
+
 | 序号 | PyTorch API                                                  | PaddlePaddle API                                             | 备注                                                         |
 | ---- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
 | 1    | [torch.nn.DataParallel](https://pytorch.org/docs/stable/generated/torch.nn.DataParallel.html?highlight=dataparallel#torch.nn.DataParallel) | [paddle.DataParallel](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/DataParallel_cn.html#dataparallel) | [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/utils/torch.nn.DataParallel.md)                   |

docs/pytorch_project_convertor/API_docs/vision/README.md

 ## 视觉类API映射列表
 
-该文档梳理了与视觉处理相关的PyTorch-PaddlePaddle API映射列表。
+该文档梳理了与视觉处理相关的PyTorch-PaddlePaddle API映射列表。  
+
 | 序号 | PyTorch API                                                  | PaddlePaddle API                                             | 备注                                                    |
 | ---- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------------------------------------------------- |
 | 1    | [torchvision.transforms.Compose](https://pytorch.org/vision/stable/transforms.html?highlight=compose#torchvision.transforms.Compose) | [paddle.vision.transforms.Compose](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/vision/transforms/Compose_cn.html#compose) | 功能一致                                                |