fix error: _pickle.UnpicklingError: invalid load key, 'v'. (#1966)

YC

2024-07-29 259343dda5a4589f067dc4af5edf165101303845

1
2
3
4
5
6
7
8
9
c    1
cc    2
ccc    3
cd    4
d    5
dc    6
dcc    7
dccc    8
cm    9