我是Python的新手,我正在尝试编写一个将在python中合并两个字典对象的函数。 例如
dict1 = {'a':[1], 'b':[2]}
dict2 = {'b':[3], 'c':[4]}
我需要制作一个新的合并字典
dict3 = {'a':[1], 'b':[2,3], 'c':[4]}
函数还应该使用参数“conflict”(设置为True或False)。当冲突设置为False时,上面就可以了。当conflict设置为True时,代码将合并这样的字典:
dict3 = {'a':[1], 'b_1':[2], 'b_2':[3], 'c':[4]}
我试图附加2个词典,但不确定如何以正确的方式进行。
for key in dict1.keys():
if dict2.has_key(key):
dict2[key].append(dict1[key])
答案 0 :(得分:9)
如果您想要一个不会改变原始dicts并监视名称冲突的合并副本,您可能想尝试这个解决方案:
#! /usr/bin/env python3
import copy
import itertools
def main():
dict_a = dict(a=[1], b=[2])
dict_b = dict(b=[3], c=[4])
complete_merge = merge_dicts(dict_a, dict_b, True)
print(complete_merge)
resolved_merge = merge_dicts(dict_a, dict_b, False)
print(resolved_merge)
def merge_dicts(a, b, complete):
new_dict = copy.deepcopy(a)
if complete:
for key, value in b.items():
new_dict.setdefault(key, []).extend(value)
else:
for key, value in b.items():
if key in new_dict:
# rename first key
counter = itertools.count(1)
while True:
new_key = f'{key}_{next(counter)}'
if new_key not in new_dict:
new_dict[new_key] = new_dict.pop(key)
break
# create second key
while True:
new_key = f'{key}_{next(counter)}'
if new_key not in new_dict:
new_dict[new_key] = value
break
else:
new_dict[key] = value
return new_dict
if __name__ == '__main__':
main()
程序显示两个合并词典的以下表示形式:
{'a': [1], 'b': [2, 3], 'c': [4]}
{'a': [1], 'b_1': [2], 'b_2': [3], 'c': [4]}
答案 1 :(得分:3)
我想你想要这个:
dict1 = {'a':[1], 'b':[2]}
dict2 = {'b':[3], 'c':[4]}
def mergeArray(conflict):
for key in dict1.keys():
if dict2.has_key(key):
if conflict==False:
dict2[key].extend(dict1[key])
else:
dict2[key+'_1'] = dict1[key]
dict2[key+'_2'] = dict2.pop(key)
else:
dict2[key] = dict1[key]
mergeArray(True);
print dict2