将字典键写入 csv

import pandas as pd

dict_of_right_transitions = {
(0,1):'1',
(0,2):'2',
(0,6):'3',
(1,2):'4',
(1,3):'5',
(1,4):'6',
(1,5):'7',
(1,7):'8'
}
z = pd.DataFrame(list(dict_of_right_transitions.keys()), columns=['first status', 'second status'])
print(z)
z.to_csv(r"C:\\Users\\Users\\PyProj\\Script_check\\dict_of_right_transitions.csv")

结论

    first status  second status
0              0              1
1              0              2
2              0              6
3              1              2
4              1              3
5              1              4
6              1              5
7              1              7

告诉我如何将密钥写入 csv 文件。现在文件被写入一个单元格

应该是（无索引）