你可以把清单展平,然后把它打开。

l = [[1,2,3],[4,5,6],[7,8,9]]
print(*[elt for sl in l for elt in sl])

使用set方法可以从列表中删除重复项

数据=

 ['','a','a','a','a','a','a','','b','b','b','b','b','b','b','b',
 '','','c','c','c','c','c','c','','','','d','d','d','d','d','d','d','d',
 '','','e','e','e','e','e','e','','','a','a','a','a','a','a',
 '','','','b','b','b','b','b','b','b','b','b','','','c','c','c','c','c','c',
 '','','','d','d','d','d','d','d','','','e','e','e','e','e','e',
 '','','a','a','a','a','a','a','','b','b','b','b','b','b','b','b',
 '','','c','c','c','c','c','c','','','','d','d','d','d','d','d','d','d',
 '','','e','e','e','e','e','e','','','a','a','a','a','a','a',
 '','','','b','b','b','b','b','b','b','b','b','','','c','c','c','c','c','c',
 '','','','d','d','d','d','d','d','','','e','e','e','e','e','e','','']

打印(集合(数据))