The usage of squeeze is mainly to compress the dimensions of the data .
The usage of unsqueeze is mainly to decompress the dimensions of the data .
squeeze
1) a.squeeze() is to delete all the dimensions of a in a that are 1
2) squeeze(a) is equivalent to a.squeeze()
3) torch.squeeze(a, N) , if the Nth dimension of a is 1, remove it; if it is not 1, the method will fail
4) a.squeeze(1) has the same effect as above
unsqueeze
1) Similar to the usage of squeeze above, the result is opposite
