<\/p>\n
\u5728 Python \u4e2d\uff0c`isinstance()` \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5167\u5efa\u51fd\u5f0f\uff0c\u80fd\u5920\u6aa2\u67e5\u4e00\u500b\u7269\u4ef6\u662f\u5426\u70ba\u7279\u5b9a\u985e\u5225\u7684\u5be6\u4f8b\u3002\u9019\u4e0d\u50c5\u5305\u62ec\u76f4\u63a5\u7684\u985e\u5225\u6aa2\u67e5\uff0c\u9084\u53ef\u4ee5\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u5c6c\u65bc\u67d0\u500b\u985e\u5225\u7684\u5b50\u985e\u5225\u6216\u7236\u985e\u5225\u3002\u96a8\u8457 Python \u8a9e\u6cd5\u7684\u6f14\u9032\uff0c\u4f7f\u7528 `isinstance()` \u6210\u70ba\u4e86\u6aa2\u67e5\u7269\u4ef6\u985e\u578b\u7684\u6700\u4f73\u5be6\u8e10\u4e4b\u4e00\u3002<\/p>\n
`isinstance()` \u7684\u4f7f\u7528\u65b9\u6cd5\u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u50b3\u5165\u5169\u500b\u53c3\u6578\uff1a\u7b2c\u4e00\u500b\u53c3\u6578\u662f\u8981\u6aa2\u67e5\u7684\u7269\u4ef6\uff0c\u7b2c\u4e8c\u500b\u53c3\u6578\u662f\u8981\u6aa2\u67e5\u7684\u985e\u5225\u6216\u985e\u5225\u5143\u7d44\u3002\u5982\u679c\u50b3\u5165\u7684\u7269\u4ef6\u662f\u8a72\u985e\u5225\u7684\u5be6\u4f8b\uff0c\u5247\u6703\u56de\u50b3 `True`\uff0c\u5426\u5247\u6703\u56de\u50b3 `False`\u3002<\/p>\n
“`python
\nclass A:
\n pass<\/p>\n
class B(A):
\n pass<\/p>\n
a = A()
\nb = B()<\/p>\n
print(isinstance(a, A)) # True
\nprint(isinstance(b, A)) # True
\nprint(isinstance(b, B)) # True
\n“`<\/p>\n
\u4f7f\u7528 `isinstance()` \u7684\u4e3b\u8981\u512a\u9ede\u5728\u65bc\u5b83\u80fd\u5920\u7c21\u5316\u985e\u5225\u6aa2\u67e5\u7684\u6d41\u7a0b\uff0c\u8b93\u4ee3\u78bc\u66f4\u5177\u53ef\u8b80\u6027\u3002\u6b64\u5916\uff0c\u5b83\u80fd\u5920\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u70ba\u67d0\u500b\u985e\u5225\u7684\u5b50\u985e\u5225\uff0c\u4f7f\u5f97\u4ee3\u78bc\u5728\u9762\u5c0d\u7e7c\u627f\u7d50\u69cb\u6642\u66f4\u5177\u5f48\u6027\u3002<\/p>\n
`isinstance()` \u7684\u4e3b\u8981\u9650\u5236\u662f\u5b83\u50c5\u80fd\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u70ba\u7279\u5b9a\u985e\u5225\u7684\u5be6\u4f8b\uff0c\u5c0d\u65bc\u67d0\u4e9b\u8907\u96dc\u7684\u578b\u5225\u6aa2\u67e5\u9700\u6c42\uff0c\u53ef\u80fd\u9700\u8981\u984d\u5916\u7684\u908f\u8f2f\u4f86\u5224\u65b7\u3002<\/p>\n
`isinstance()` \u53ef\u4ee5\u7528\u65bc\u591a\u7a2e\u5834\u666f\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u78ba\u4fdd\u7269\u4ef6\u985e\u578b\u7684\u60c5\u6cc1\u4e0b\u3002\u4f8b\u5982\uff0c\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u70ba\u5b57\u4e32\u985e\u578b\uff1a<\/p>\n
“`python
\nif isinstance(obj, str):
\n # \u9032\u884c\u5b57\u4e32\u76f8\u95dc\u8655\u7406
\n“`<\/p>\n
\u6b64\u5916\uff0c`isinstance()` \u4e5f\u53ef\u4ee5\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u70ba\u6578\u503c\u985e\u578b\uff1a<\/p>\n
“`python
\nif isinstance(obj, (int, float)):
\n # \u9032\u884c\u6578\u503c\u76f8\u95dc\u8655\u7406
\n“`<\/p>\n
\u751a\u81f3\u53ef\u4ee5\u6aa2\u67e5\u7269\u4ef6\u662f\u5426\u70ba\u53ef\u8b8a\u985e\u578b\uff1a<\/p>\n
“`python
\nimport collections<\/p>\n
if isinstance(obj, collections.MutableSequence):
\n # \u9032\u884c\u53ef\u8b8a\u5e8f\u5217\u76f8\u95dc\u8655\u7406
\n“`<\/p>\n
Python \u4e2d\u7684 `isinstance()` \u51fd\u5f0f\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u6aa2\u67e5\u7269\u4ef6\u7684\u985e\u578b\u548c\u7e7c\u627f\u95dc\u4fc2\u3002\u9019\u4f7f\u5f97\u958b\u767c\u8005\u5728\u7de8\u5beb\u4ee3\u78bc\u6642\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u78ba\u8a8d\u7269\u4ef6\u7684\u6b63\u78ba\u6027\uff0c\u4e26\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\u3002<\/p>\n