python 把字典变为有序

python 把字典变为有序

1. 使用OrderedDict

if __name__ == "__main__": from collections import OrderedDict columns = {"column_1": "value1", "column_3": "value3","column_2": "value2","column_5": "value5","column_4": "value4"} new_dict = OrderedDict(sorted(columns.items(), key=lambda x: int(x[0].split("_")[1]))) print(new_dict)# 输出的结果为{"column_1": "value1", "column_2": "value2","column_3": "value3","column_4": "value4","column_5": "value5"}

2. 添加时顺序保存

```pythonif __name__ == "__main__": import collections old_dict = collections.OrderedDict() old_dict["column_1"] = "value1" old_dict["column_2"] = "value2" old_dict["column_3"] = "value3" old_dict["column_4"] = "value4" old_dict["column_5"] = "value5" print(old_dict)# 输出的结果为{"column_1": "value1", "column_2": "value2","column_3": "value3","column_4": "value4","column_5": "value5"}

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