I want to ask some questions about the code. I hope you can help me solve them， thx

[eoozbq]

code path is models/action.py, line63-72.
line 63 I could konw x.size is nt, c, h, w. After x forward from line 63 to line 72, could get x_shift and thex_shift.size is nt, c,h,w.
The x_shift.size is euqal to x.size. why don't make x_shift = x?
I want to konw what function of these code.

[H-Hui2277]

x_shift is probably refered from STM and TSM.