python - 拆分列表并存储在python中的字典中

Question

假设我有一个列表，例如

L = ['B0','B1','C1','C2','D1','D3']

然后如何将列表拆分为值和键并将其存储在以下形式的字典中:-

{ 'B':['0','1'],
  'C':['1','2'],
  'D':['1','3']}

Answer 1

L = ['B0','B1','C1','C2','D1','D3']
d = {}
for i in L:
    d.setdefault(i[0], []).append(i[1])

>>> d
{'B': ['0', '1'], 'C': ['1', '2'], 'D': ['1', '3']}