如何在列表列表中的每个列表中添加字符串?
current = [['a'],['b'],['c']]
desired = [['Person','a'],['Person','b'],['Person','c']]
您可以尝试以下方法:
import itertools
list(map(list, zip(itertools.repeat('Person'), list(itertools.chain(*current)))))
# [['Person', 'a'], ['Person', 'b'], ['Person', 'c']]
[['person',c[0]] for c in current]