如何将字典列表合并为一个字典?
问题描述：
我该如何列出这样的字典.
How can I turn a list of dicts like this..
[{'a':1}, {'b':2}, {'c':1}, {'d':2}]
...变成这样的单个字典:
...into a single dict like this:
{'a':1, 'b':2, 'c':1, 'd':2}
答
此方法适用于任何长度的字典:
This works for dictionaries of any length:
>>> result = {}
>>> for d in L:
... result.update(d)
...
>>> result
{'a':1,'c':1,'b':2,'d':2}
作为理解:
# Python >= 2.7
{k: v for d in L for k, v in d.items()}
# Python < 2.7
dict(pair for d in L for pair in d.items())