How to merge two dictionaries with same key names

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Difference between append vs. extend list methods in Python 22 answers

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如果您想要一个不会改变原始字典并查看名称冲突的合并副本，则可能需要尝试此解决方案：

>>> dict1 = {'a': [1], 'b': [2]}
>>> dict2 = {'b': [3], 'c': [4]}
>>> import copy
>>> import itertools
>>> def merge(a, b, conflict):
    new = copy.deepcopy(a)
    if conflict:
        for key, value in b.items():
            if key in new:
                counter = itertools.count(1)
                # Rename 1st key.
                while True:
                    name = '{}_{}'.format(key, next(counter))
                    if name not in new:
                        new[name] = new[key]
                        del new[key]
                        break
                # Create 2nd key.
                while True:
                    name = '{}_{}'.format(key, next(counter))
                    if name not in new:
                        new[name] = value
                        break
            else:
                new[key] = value
    else:
        for key, value in b.items():
            new.setdefault(key, []).extend(value)
    return new

>>> merge(dict1, dict2, False)
{'c': [4], 'b': [2, 3], 'a': [1]}
>>> merge(dict1, dict2, True)
{'b_2': [3], 'b_1': [2], 'c': [4], 'a': [1]}

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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

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