Merge pull request #197 from ooooo-create/norm

[Accuracy diff No.28-29] Fix accuracy diff for paddle.linalg.norm API

Author: wanghuancoder

tester/paddle_to_torch/rules.py

@@ -3872,7 +3872,7 @@ def apply(self, paddle_api: str) -> ConvertResult:
         result = (x!= 0).sum(dim=axis, keepdim=True).to(x.dtype)
     else:
         result = (x!= 0).sum(dim=axis).to(x.dtype)
-elif len(x.shape)>2 and axis is None:
+elif len(x.shape)>=2 and axis is None:
     if p==math.inf:
         if keepdim:
             result = x.abs().amax().reshape([1] * x.ndim)
@@ -3884,7 +3884,12 @@ def apply(self, paddle_api: str) -> ConvertResult:
         else:
             result = x.abs().amin()
     else:
+        _kwargs["input"] = x.flatten()
+        if p == "fro":
+            _kwargs["ord"] = 2
         result = {self.torch_api}(**_kwargs)
+        if keepdim:
+            result = result.reshape([1] * x.ndim)
 else:
     result = {self.torch_api}(**_kwargs)
 """