cls\u542b\u4e49\u53ca\u4f7f\u7528\u65b9\u6cd5<\/p>\n
python\u4e2dcls\u4ee3\u8868\u7684\u662f\u7c7b\u7684\u672c\u8eab\uff0c\u76f8\u5bf9\u5e94\u7684self\u5219\u662f\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u3002<\/p>\n
\u56e0\u4e3acls\u7b49\u540c\u4e8e\u7c7b\u672c\u8eab\uff0c\u7c7b\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528cls\u6765\u5b9e\u4f8b\u5316\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
\u901a\u8fc7\u89c2\u5bdfprint\u8f93\u51fa\u7ed3\u679c\uff0c\u4e0d\u96be\u770b\u51faself\u662f\u7ecf\u8fc7\u5b9e\u4f8b\u5316\u5e76\u5206\u914d\u4e86\u5185\u5b58\uff0ccls\u5373\u4e3a\u7c7b\u672c\u8eab\u3002<\/p>\n
class Person(object):\n def __init__(self, name, age):\n self.name = name\n self.age = age\n print('self:', self)\n\n # \u5b9a\u4e49\u4e00\u4e2abuild\u65b9\u6cd5\uff0c\u8fd4\u56de\u4e00\u4e2aperson\u5b9e\u4f8b\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u7b49\u4ef7\u4e8ePerson()\u3002\n @classmethod\n def build(cls):\n # cls()\u7b49\u4e8ePerson()\n p = cls("Tom", 18)\n print('cls:', cls)\n return p\n\nif __name__ == '__main__':\n person = Person.build()\n print(person, person.name, person.age)<\/code><\/pre>\n\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
In [71]: runfile('C:\/Users\/Administrator\/.spyder-py3\/temp.py', wdir='C:\/Users\/Administrator\/.spyder-py3')\nself: <__main__.Person object at 0x00000153E5DBF048>\ncls: <class '__main__.Person'>\n<__main__.Person object at 0x00000153E5DBF048> Tom 18<\/code><\/pre>\nclassmethod\u4f7f\u7528\u573a\u666f<\/h2>\n
\u5b98\u65b9\u7684\u8bf4\u6cd5\uff1a
\nclassmethod(function)
\n\u4e2d\u6587\u8bf4\u660e\uff1a
\nclassmethod\u662f\u7528\u6765\u6307\u5b9a\u4e00\u4e2a\u7c7b\u7684\u65b9\u6cd5\u4e3a\u7c7b\u65b9\u6cd5\uff0c\u6ca1\u6709\u6b64\u53c2\u6570\u6307\u5b9a\u7684\u7c7b\u7684\u65b9\u6cd5\u4e3a\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n
class C:\n @classmethod\n def f(cls, arg1, arg2, ...): ...<\/code><\/pre>\n\u770b\u540e\u4e4b\u540e\u771f\u662f\u4e00\u5934\u96fe\u6c34\u3002\u8bf4\u7684\u5565\u5b50\u4e1c\u897f\u5462\uff1f\uff1f\uff1f<\/p>\n
\u81ea\u5df1\u5230\u56fd\u5916\u7684\u8bba\u575b\u770b\u5176\u4ed6\u7684\u4f8b\u5b50\u548c\u89e3\u91ca\uff0c\u987f\u65f6\u5c31\u5f88\u660e\u6717\u3002 \u4e0b\u9762\u81ea\u5df1\u7528\u4f8b\u5b50\u6765\u8bf4\u660e\u3002<\/p>\n
\u770b\u4e0b\u9762\u7684\u5b9a\u4e49\u7684\u4e00\u4e2a\u65f6\u95f4\u7c7b\uff1a<\/p>\n
class Data_test(object):\n day=0\n month=0\n year=0\n def __init__(self,year=0,month=0,day=0):\n self.day=day\n self.month=month\n self.year=year\n\n def out_date(self):\n print "year :"\n print self.year\n print "month :"\n print self.month\n print "day :"\n print self.day\nt=Data_test(2016,8,1)\nt.out_date()<\/code><\/pre>\n\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
year :\n2016\nmonth :\n8\nday :\n1<\/code><\/pre>\n\u7b26\u5408\u671f\u671b\u3002<\/p>\n
\u5982\u679c\u7528\u6237\u8f93\u5165\u7684\u662f "2016-8-1" \u8fd9\u6837\u7684\u5b57\u7b26\u683c\u5f0f\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u8c03\u7528Date_test \u7c7b\u524d\u505a\u4e00\u4e0b\u5904\u7406\uff1a<\/p>\n
string_date='2016-8-1'\nyear,month,day=map(int,string_date.split('-'))\ns=Data_test(year,month,day)<\/code><\/pre>\n\u5148\u628a\u20182016-8-1\u2019 \u5206\u89e3\u6210 year\uff0cmonth\uff0cday \u4e09\u4e2a\u53d8\u91cf\uff0c\u7136\u540e\u8f6c\u6210int\uff0c\u518d\u8c03\u7528Date_test(year,month,day)\u51fd\u6570\u3002 \u4e5f\u5f88\u7b26\u5408\u671f\u671b\u3002<\/p>\n
\u90a3\u6211\u53ef\u4e0d\u53ef\u4ee5\u628a\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5904\u7406\u7684\u51fd\u6570\u653e\u5230 Date_test \u7c7b\u5f53\u4e2d\u5462\uff1f<\/p>\n
\u90a3\u4e48@classmethod \u5c31\u5f00\u59cb\u51fa\u573a\u4e86<\/p>\n
class Data_test2(object):\n day=0\n month=0\n year=0\n def __init__(self,year=0,month=0,day=0):\n self.day=day\n self.month=month\n self.year=year\n\n @classmethod\n def get_date(cls,\nstring_date):\n #\u8fd9\u91cc\u7b2c\u4e00\u4e2a\u53c2\u6570\u662fcls\uff0c \u8868\u793a\u8c03\u7528\u5f53\u524d\u7684\u7c7b\u540d\n year,month,day=map(int,string_date.split('-'))\n date1=cls(year,month,day)\n #\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u521d\u59cb\u5316\u540e\u7684\u7c7b\n return date1\n\n def out_date(self):\n print "year :"\n print self.year\n print "month :"\n print self.month\n print "day :"\n print self.day<\/code><\/pre>\n\u5728Date_test\u7c7b\u91cc\u9762\u521b\u5efa\u4e00\u4e2a\u6210\u5458\u51fd\u6570\uff0c \u524d\u9762\u7528\u4e86@classmethod\u88c5\u9970\u3002 \u5b83\u7684\u4f5c\u7528\u5c31\u662f\u6709\u70b9\u50cf\u9759\u6001\u7c7b\uff0c\u6bd4\u9759\u6001\u7c7b\u4e0d\u4e00\u6837\u7684\u5c31\u662f\u5b83\u53ef\u4ee5\u4f20\u8fdb\u6765\u4e00\u4e2a\u5f53\u524d\u7c7b\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\u3002<\/p>\n
\u90a3\u4e48\u5982\u4f55\u8c03\u7528\u5462\uff1f<\/p>\n
r=Data_test2.get_date("2016-8-6")\nr.out_date()<\/code><\/pre>\n\u8f93\u51fa\uff1a<\/p>\n
year :\n2016\nmonth :\n8\nday :\n1<\/code><\/pre>\n\u8fd9\u6837\u5b50\u7b49\u4e8e\u5148\u8c03\u7528get_date\uff08\uff09\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5904\u7406\uff0c\u7136\u540e\u624d\u4f7f\u7528Data_test\u7684\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u3002<\/p>\n
\u8fd9\u6837\u7684\u597d\u5904\u5c31\u662f\u4f60\u4ee5\u540e\u91cd\u6784\u7c7b\u7684\u65f6\u5019\u4e0d\u5fc5\u8981\u4fee\u6539\u6784\u9020\u51fd\u6570\uff0c\u53ea\u9700\u8981\u989d\u5916\u6dfb\u52a0\u4f60\u8981\u5904\u7406\u7684\u51fd\u6570\uff0c\u7136\u540e\u4f7f\u7528\u88c5\u9970\u7b26 @classmethod \u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n