refactor code

Lab1/code/1.1.py

@@ -12,7 +12,7 @@ result1 = A - B
 result2 = torch.sub(A, B)
 
 # 方法3: 手动实现广播机制并作差
-def mysub(a:torch.Tensor, b:torch.Tensor):
+def my_sub(a:torch.Tensor, b:torch.Tensor):
     if not (
         (a.size(0) == 1 and b.size(1) == 1) 
         or 
@@ -29,7 +29,7 @@ def mysub(a:torch.Tensor, b:torch.Tensor):
                 result[i, j] = A_broadcasted[i, j] - B_broadcasted[i, j]
         return result
 
-result3 = mysub(A, B)
+result3 = my_sub(A, B)
 
 print("方法1的结果:")
 print(result1)