python中从字典转换为列表的问题

Question

我已经把我的字典转换成了一个列表，但是在使用特定的格式时遇到了麻烦。我的输出字典是

foldersinlist = [['Training'], ['Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']]

我想要的是

['Training', 'Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']

我现在的代码如下

foldersinlist = list(folders.values())
print(foldersinlist)

Answer 1

这是嵌套列表而不是字典：

foldersinlist = [['Training'], ['Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']]

这是一个简单的列表：

['Training', 'Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']

只要做：

ll = sum(foldersinlist , [])

Answer 2

尝试：

print([x for i in foldersinlist for x in i])

输出：

['Training', 'Training videos', 'Training documents', 'Training workouts', 'Training practicals', 'Training practicals', 'Training practicals']