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
```