{"id":1114470,"date":"2025-01-08T17:57:33","date_gmt":"2025-01-08T09:57:33","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1114470.html"},"modified":"2025-01-08T17:57:35","modified_gmt":"2025-01-08T09:57:35","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e4%b8%80%e4%b8%aa%e5%8f%98%e9%87%8f%e7%9a%84%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1114470.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b"},"content":{"rendered":"

\"python\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\"<\/p>\n

\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()<\/code>\u3001isinstance()<\/code>\u3001issubclass()<\/code>\u6765\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b<\/strong>\u3002\u5176\u4e2d\uff0ctype()<\/code>\u8fd4\u56de\u53d8\u91cf\u7684\u7c7b\u578b\uff0cisinstance()<\/code>\u68c0\u67e5\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u578b\uff0cissubclass()<\/code>\u5219\u68c0\u67e5\u4e00\u4e2a\u7c7b\u662f\u5426\u662f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5b50\u7c7b\u3002\u4ee5\u4e0b\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u65b9\u6cd5\u7684\u4f7f\u7528\u53ca\u5176\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e00\u3001type()<\/code>\u51fd\u6570<\/p>\n

type()<\/code>\u51fd\u6570\u7528\u4e8e\u8fd4\u56de\u5bf9\u8c61\u7684\u7c7b\u578b\u3002\u8c03\u7528\u65b9\u6cd5\u4e3atype(object)<\/code>\uff0c\u5176\u4e2dobject<\/code>\u662f\u4f60\u8981\u68c0\u67e5\u7684\u53d8\u91cf\u3002\u4f7f\u7528type()<\/code>\u51fd\u6570\u6765\u5224\u65ad\u53d8\u91cf\u7c7b\u578b\u7684\u57fa\u672c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

x = 10<\/p>\n
print(type(x))  # <class 'int'><\/p>\n
y = "Hello"<\/p>\n
print(type(y))  # <class 'str'><\/p>\n
z = [1, 2, 3]<\/p>\n
print(type(z))  # <class 'list'><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9\uff1a<\/strong> type()<\/code>\u51fd\u6570\u7b80\u5355\u76f4\u89c2\uff0c\u9002\u7528\u4e8e\u5feb\u901f\u67e5\u770b\u53d8\u91cf\u7c7b\u578b\u3002<\/p>\n
\u7f3a\u70b9\uff1a<\/strong> \u5982\u679c\u9700\u8981\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u522b\u6216\u5176\u5b50\u7c7b\u522b\u65f6\uff0ctype()<\/code>\u4e0d\u5982isinstance()<\/code>\u65b9\u4fbf\u3002<\/p>\n<\/p>\n
\u4e8c\u3001isinstance()<\/code>\u51fd\u6570<\/p>\n
isinstance()<\/code>\u51fd\u6570\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u6307\u5b9a\u7684\u7c7b\u578b\u6216\u5176\u5b50\u7c7b\u3002\u8c03\u7528\u65b9\u6cd5\u4e3aisinstance(object, classinfo)<\/code>\uff0c\u5176\u4e2dobject<\/code>\u662f\u4f60\u8981\u68c0\u67e5\u7684\u53d8\u91cf\uff0cclassinfo<\/code>\u662f\u7c7b\u578b\u6216\u7c7b\u578b\u7684\u5143\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
x = 10<\/p>\n
print(isinstance(x, int))  # True<\/p>\n
y = "Hello"<\/p>\n
print(isinstance(y, str))  # True<\/p>\n
z = [1, 2, 3]<\/p>\n
print(isinstance(z, list))  # True<\/p>\n
Checking multiple types<\/strong><\/h2>\n
a = 10.5<\/p>\n
print(isinstance(a, (int, float)))  # True<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9\uff1a<\/strong> isinstance()<\/code>\u4e0d\u4ec5\u53ef\u4ee5\u68c0\u67e5\u53d8\u91cf\u7c7b\u578b\uff0c\u8fd8\u80fd\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u578b\u7684\u5b50\u7c7b\uff0c\u9002\u7528\u8303\u56f4\u66f4\u5e7f\u3002<\/p>\n
\u7f3a\u70b9\uff1a<\/strong> \u9700\u8981\u663e\u5f0f\u63d0\u4f9b\u8981\u68c0\u67e5\u7684\u7c7b\u578b\u6216\u7c7b\u578b\u5143\u7ec4\u3002<\/p>\n<\/p>\n
\u4e09\u3001issubclass()<\/code>\u51fd\u6570<\/p>\n
issubclass()<\/code>\u51fd\u6570\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u7c7b\u662f\u5426\u662f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5b50\u7c7b\u3002\u8c03\u7528\u65b9\u6cd5\u4e3aissubclass(class, classinfo)<\/code>\uff0c\u5176\u4e2dclass<\/code>\u662f\u8981\u68c0\u67e5\u7684\u7c7b\uff0cclassinfo<\/code>\u662f\u53ef\u80fd\u7684\u57fa\u7c7b\u6216\u5143\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
class Animal:<\/p>\n
    pass<\/p>\n
class Dog(Animal):<\/p>\n
    pass<\/p>\n
print(issubclass(Dog, Animal))  # True<\/p>\n
print(issubclass(Dog, object))  # True<\/p>\n
print(issubclass(Animal, Dog))  # False<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9\uff1a<\/strong> issubclass()<\/code>\u4e13\u95e8\u7528\u4e8e\u7c7b\u7ee7\u627f\u5173\u7cfb\u7684\u68c0\u67e5\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5224\u65ad\u7c7b\u5c42\u6b21\u7ed3\u6784\u7684\u573a\u666f\u3002<\/p>\n
\u7f3a\u70b9\uff1a<\/strong> \u4ec5\u9002\u7528\u4e8e\u7c7b\uff0c\u800c\u4e0d\u9002\u7528\u4e8e\u5177\u4f53\u7684\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u6848\u4f8b\u53ca\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n
1\u3001\u5904\u7406\u591a\u7c7b\u578b\u8f93\u5165<\/h4>\n<\/p>\n
\u5728\u67d0\u4e9b\u51fd\u6570\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5904\u7406\u591a\u79cd\u7c7b\u578b\u7684\u8f93\u5165\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u51fd\u6570\u65e2\u53ef\u4ee5\u63a5\u53d7\u6574\u6570\u4e5f\u53ef\u4ee5\u63a5\u53d7\u6d6e\u70b9\u6570\uff1a<\/p>\n<\/p>\n
def process_number(num):<\/p>\n
    if isinstance(num, (int, float)):<\/p>\n
        return num  2<\/p>\n
    else:<\/p>\n
        rAI<\/a>se TypeError("Input must be an int or float")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528isinstance()<\/code>\u80fd\u591f\u65b9\u4fbf\u5730\u68c0\u67e5\u8f93\u5165\u7c7b\u578b\uff0c\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<\/p>\n
2\u3001\u68c0\u67e5\u7c7b\u7ee7\u627f\u5173\u7cfb<\/h4>\n<\/p>\n
\u5728\u8bbe\u8ba1\u7c7b\u5c42\u6b21\u7ed3\u6784\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u68c0\u67e5\u67d0\u4e2a\u7c7b\u662f\u5426\u6b63\u786e\u7ee7\u627f\u4e86\u9884\u671f\u7684\u57fa\u7c7b\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
class Base:<\/p>\n
    pass<\/p>\n
class Derived(Base):<\/p>\n
    pass<\/p>\n
def check_inheritance(cls):<\/p>\n
    if not issubclass(cls, Base):<\/p>\n
        raise TypeError("Class must inherit from Base")<\/p>\n
check_inheritance(Derived)  # No error<\/p>\n
check_inheritance(int)  # Raises TypeError<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cissubclass()<\/code>\u53ef\u4ee5\u786e\u4fdd\u7c7b\u5c42\u6b21\u7ed3\u6784\u7684\u6b63\u786e\u6027\u3002<\/p>\n<\/p>\n
3\u3001\u7c7b\u578b\u63d0\u793a\u4e0e\u9759\u6001\u7c7b\u578b\u68c0\u67e5<\/h4>\n<\/p>\n
\u5728\u8f83\u5927\u7684\u4ee3\u7801\u5e93\u4e2d\uff0c\u4f7f\u7528\u7c7b\u578b\u63d0\u793a\uff08type hinting\uff09\u548c\u9759\u6001\u7c7b\u578b\u68c0\u67e5\u5de5\u5177\uff08\u5982mypy\uff09\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u5065\u58ee\u6027\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
def add_numbers(a: int, b: int) -> int:<\/p>\n
    return a + b<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u5f0f\u867d\u7136\u4e0d\u662f\u76f4\u63a5\u7684\u7c7b\u578b\u68c0\u67e5\uff0c\u4f46\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u6e05\u6670\u5730\u4e86\u89e3\u51fd\u6570\u7684\u9884\u671f\u8f93\u5165\u548c\u8f93\u51fa\u7c7b\u578b\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n
\u901a\u8fc7\u4f7f\u7528type()<\/code>\u3001isinstance()<\/code>\u548cissubclass()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u5728Python\u4e2d\u7075\u6d3b\u5730\u5224\u65ad\u53d8\u91cf\u7684\u7c7b\u578b\u548c\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb\u3002\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u4e0d\u4ec5\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u5065\u58ee\u6027\uff0c\u8fd8\u80fd\u907f\u514d\u6f5c\u5728\u7684\u7c7b\u578b\u9519\u8bef\uff0c\u4ece\u800c\u7f16\u5199\u51fa\u66f4\u4e3a\u53ef\u9760\u548c\u9ad8\u6548\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u4f7f\u7528Python\u5185\u7f6e\u51fd\u6570\u5224\u65ad\u53d8\u91cf\u7c7b\u578b\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()<\/code>\u6765\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u8fd9\u4e2a\u51fd\u6570\u4f1a\u8fd4\u56de\u53d8\u91cf\u7684\u7c7b\u578b\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528type(variable)<\/code>\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5230\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u65b9\u4fbf\u5f00\u53d1\u8005\u8fdb\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002<\/p>\n
\u4f7f\u7528isinstance\u51fd\u6570\u5224\u65ad\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684\u65b9\u5f0f\u662f\u4ec0\u4e48\uff1f<\/strong>
isinstance()<\/code>\u51fd\u6570\u662f\u53e6\u4e00\u79cd\u5224\u65ad\u53d8\u91cf\u7c7b\u578b\u7684\u6709\u6548\u65b9\u5f0f\u3002\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u68c0\u67e5\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u8fd8\u53ef\u4ee5\u68c0\u67e5\u53d8\u91cf\u662f\u5426\u5c5e\u4e8e\u67d0\u4e2a\u7c7b\u7684\u5b50\u7c7b\u3002\u4f8b\u5982\uff0c\u4f7f\u7528isinstance(variable, int)<\/code>\u53ef\u4ee5\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u9700\u8981\u5904\u7406\u7ee7\u627f\u5173\u7cfb\u65f6\u7279\u522b\u6709\u7528\u3002<\/p>\n
\u5728Python\u4e2d\u5982\u4f55\u5904\u7406\u52a8\u6001\u7c7b\u578b\u53d8\u91cf\uff1f<\/strong>
Python\u662f\u4e00\u79cd\u52a8\u6001\u7c7b\u578b\u8bed\u8a00\uff0c\u8fd9\u610f\u5473\u7740\u53d8\u91cf\u7684\u7c7b\u578b\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u6539\u53d8\u3002\u4e3a\u4e86\u6709\u6548\u7ba1\u7406\u52a8\u6001\u7c7b\u578b\u53d8\u91cf\uff0c\u53ef\u4ee5\u7ed3\u5408\u4f7f\u7528type()<\/code>\u548cisinstance()<\/code>\u51fd\u6570\uff0c\u53ca\u65f6\u68c0\u67e5\u53d8\u91cf\u7684\u7c7b\u578b\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8f6c\u6362\u6216\u5904\u7406\u3002\u786e\u4fdd\u5728\u64cd\u4f5c\u53d8\u91cf\u4e4b\u524d\u4e86\u89e3\u5176\u7c7b\u578b\uff0c\u6709\u52a9\u4e8e\u907f\u514d\u6f5c\u5728\u7684\u9519\u8bef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()\u3001isinstance()\u3001issubclass()\u6765\u5224\u65ad\u4e00 […]","protected":false},"author":3,"featured_media":1114480,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114470"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1114470"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114470\/revisions"}],"predecessor-version":[{"id":1114481,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1114470\/revisions\/1114481"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1114480"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1114470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1114470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1114470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}