我想寻求帮助解决这个问题，我想知道是不是我的代码有问题，或者有没有我没有安装的工具或扩展
from automata.fa.nfa import NFA
from visual_automata.fa.nfa import VisualNFA
visualnfa = VisualNFA(
states={'Q0', 'Q1', 'Q2'},
input_symbols={'A', 'B'},
transitions={
'Q0': {'A': {'Q0'}, 'B': {'Q0','Q1'}},
'Q1': {'A': {'Q2'}, 'B': {'Q1'}},
'Q2': {'A': {'Q2'}, 'B': {'Q2','Q1'}},
},
initial_state='Q0',
final_states={'Q0','Q1'},
)
visualnfa.table;
'''
The output is like this : AttributeError: 'frozendict.frozendict' object has no attribute 'deepcopy'.
I've tried to follow the suggestions on other websites and also YouTube, but still can't solve this problem, please help me friends