Python merges multiple lists in a dictionary into one list

There are many lists in the dictionary, which can be quickly merged into a list through the itertools library

import itertools

data_dict = {
    'xiaoming':['1','2'],
    'xiaomei':['3','4']
}

data_list = list(data_dict.values)
merge = itertools.chain.from_iterable(order_id_list)
result = list(merge)
print(result)

# 
['1','2','3','4']