81 lines
2.0 KiB
Python
81 lines
2.0 KiB
Python
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"""
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封装排序:
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● 普通类型列表的排序
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● 字典列表的排序
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● 对象列表的排序
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"""
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import operator
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from collections import Iterable
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def sortSimpleTypeList(li, reverse=False):
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"""
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排序简单的类型
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:param li:
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:param reverse:
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:return:
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"""
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li.sort()
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if reverse:
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li.reverse()
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return li
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def sortObjectList(obj_list, by_prop):
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"""
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排序列表:按照对象的某个属性排序
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:param obj_list:
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:param by_prop:
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:return:
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"""
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reverse = False
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if by_prop.startswith('-'):
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reverse = True
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by_prop = by_prop[1:]
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fun = operator.attrgetter(by_prop)
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obj_list.sort(key=fun)
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if reverse:
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obj_list.reverse()
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return obj_list
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def sortDictList(dict_list, by_key):
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"""
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排序字典列表:按照字典的某个key的value排序
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:param dict_list:
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:param by_key:
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:return:
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"""
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reverse = False
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if by_key.startswith('-'):
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reverse = True
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by_key = by_key[1:]
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dict_list.sort(key=lambda ele: ele[by_key])
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if reverse:
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dict_list.reverse()
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return dict_list
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def sortList(li, by=''):
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"""
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排序集合: by加上前缀'-'表示逆序
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:param li: 字典集合 or 对象集合
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:param by: 通过哪一个属性, name 按照name排序; -name 按照name反向排序
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:return: 原对象(排序后集合, 不是返回新集合)
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"""
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reverse = False
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if not li or not isinstance(li, Iterable):
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# 不是集合, 或空集合返回原内容
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return li
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if by.startswith('-'):
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reverse = True
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if isinstance(li[0], (int, float, str)):
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return sortSimpleTypeList(li, reverse)
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if not by:
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# 非简单类型的list, 必须要传入by, 否则不排序
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return li
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if isinstance(li[0], dict):
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# 如果第一个元素是字典类型,则默认所有元素都是字典类型
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return sortDictList(li, by)
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return sortObjectList(li, by)
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