I use pycharm write my code.
When I want to watch the pytorch source code, only comment in python file, such as
    def asin(self, input, out=None): # real signature unknown; restored from __doc__
        """
        asin(input, out=None) -> Tensor
        
        Returns a new tensor with the arcsine  of the elements of :attr:`input`.
        
        .. math::
            \text{out}_{i} = \sin^{-1}(\text{input}_{i})
        
        Args:
            input (Tensor): the input tensor
            out (Tensor, optional): the output tensor
        
        Example::
        
            >>> a = torch.randn(4)
            >>> a
            tensor([-0.5962,  1.4985, -0.4396,  1.4525])
            >>> torch.asin(a)
            tensor([-0.6387,     nan, -0.4552,     nan])
        """
        pass

    def asin_(self, *args, **kwargs): # real signature unknown
        pass

    def as_strided(self, *args, **kwargs): # real signature unknown
        pass

    def as_strided_(self, *args, **kwargs): # real signature unknown