{"id":954305,"date":"2024-12-27T01:55:14","date_gmt":"2024-12-26T17:55:14","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/954305.html"},"modified":"2024-12-27T01:55:16","modified_gmt":"2024-12-26T17:55:16","slug":"python%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e6%95%b4%e6%95%b0%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/954305.html","title":{"rendered":"python\u5982\u4f55\u5224\u65ad\u6574\u6570\u7c7b\u578b"},"content":{"rendered":"

\"python\u5982\u4f55\u5224\u65ad\u6574\u6570\u7c7b\u578b\"<\/p>\n

\u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528isinstance()\u51fd\u6570\u3001type()\u51fd\u6570\u3001\u6570\u5b57\u7c7b\u578b\u7684\u5185\u7f6e\u65b9\u6cd5\u7b49\u3002<\/strong>\u5176\u4e2d\uff0c\u4f7f\u7528isinstance()\u51fd\u6570\u5224\u65ad\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4ec5\u652f\u6301\u5185\u7f6e\u7c7b\u578b\uff0c\u8fd8\u652f\u6301\u7528\u6237\u81ea\u5b9a\u4e49\u7c7b\u578b\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528isinstance()\u51fd\u6570\u5224\u65ad<\/p>\n<\/p>\n

isinstance()\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u4e00\u4e2a\u5df2\u77e5\u7684\u7c7b\u578b\u3002\u5bf9\u4e8e\u6574\u6570\u7c7b\u578b\uff0c\u53ef\u4ee5\u8fd9\u6837\u4f7f\u7528\uff1a<\/p>\n<\/p>\n

x = 10<\/p>\n
if isinstance(x, int):<\/p>\n
    print("x\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
else:<\/p>\n
    print("x\u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
<\/code><\/pre>\n<\/p>\n
isinstance()\u51fd\u6570\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u652f\u6301\u7ee7\u627f\u5173\u7cfb\u5224\u65ad<\/strong>\uff0c\u8fd9\u610f\u5473\u7740\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u662f\u67d0\u4e2a\u7c7b\u7684\u5b50\u7c7b\u7684\u5b9e\u4f8b\uff0cisinstance()\u4e5f\u4f1a\u8fd4\u56deTrue\u3002\u8fd9\u4f7f\u5f97isinstance()\u5728\u5224\u65ad\u7c7b\u578b\u65f6\u66f4\u52a0\u7075\u6d3b\u548c\u5f3a\u5927\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528type()\u51fd\u6570\u5224\u65ad<\/p>\n<\/p>\n
type()\u51fd\u6570\u8fd4\u56de\u5bf9\u8c61\u7684\u7c7b\u578b\uff0c\u5982\u679c\u9700\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u4e0d\u662f\u6574\u6570\uff0c\u53ef\u4ee5\u5c06\u5176\u8fd4\u56de\u503c\u4e0eint\u7c7b\u578b\u8fdb\u884c\u6bd4\u8f83\uff1a<\/p>\n<\/p>\n
x = 10<\/p>\n
if type(x) is int:<\/p>\n
    print("x\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
else:<\/p>\n
    print("x\u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u76f8\u6bd4\u4e8eisinstance()\uff0ctype()\u66f4\u4e25\u683c<\/strong>\uff0c\u5b83\u4e0d\u652f\u6301\u7ee7\u627f\u5173\u7cfb\u5224\u65ad\u3002\u56e0\u6b64\uff0c\u901a\u5e38\u5728\u9700\u8981\u4e25\u683c\u5224\u65ad\u53d8\u91cf\u7c7b\u578b\u65f6\u4f7f\u7528type()\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u6570\u5b57\u7c7b\u578b\u7684\u5185\u7f6e\u65b9\u6cd5<\/p>\n<\/p>\n
Python\u4e2d\u7684\u6574\u6570\u7c7b\u578b\u6709\u4e00\u4e9b\u7279\u6b8a\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u68c0\u67e5\u4e00\u4e2a\u6570\u5b57\u662f\u5426\u6709\u5c0f\u6570\u90e8\u5206\uff0c\u53ef\u4ee5\u95f4\u63a5\u5224\u65ad\u5176\u662f\u5426\u4e3a\u6574\u6570\uff1a<\/p>\n<\/p>\n
def is_integer(n):<\/p>\n
    return n == int(n)<\/p>\n
x = 10.0<\/p>\n
if is_integer(x):<\/p>\n
    print("x\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
else:<\/p>\n
    print("x\u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u66f4\u591a\u7528\u4e8e\u6d6e\u70b9\u6570\u7684\u6574\u6570\u6027\u5224\u65ad<\/strong>\uff0c\u9002\u7528\u4e8e\u67d0\u4e9b\u7279\u5b9a\u573a\u666f\uff0c\u4f46\u4e00\u822c\u4e0d\u5982isinstance()\u76f4\u89c2\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5224\u65ad<\/p>\n<\/p>\n
\u5bf9\u4e8e\u4ece\u5b57\u7b26\u4e32\u8f93\u5165\u4e2d\u5224\u65ad\u662f\u5426\u4e3a\u6574\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7528\u4e8e\u5339\u914d\u5b57\u7b26\u4e32\u4e2d\u7684\u6574\u6570\u683c\u5f0f\uff1a<\/p>\n<\/p>\n
import re<\/p>\n
def is_integer_string(s):<\/p>\n
    return bool(re.match(r'^-?\\d+$', s))<\/p>\n
s = "123"<\/p>\n
if is_integer_string(s):<\/p>\n
    print("s\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
else:<\/p>\n
    print("s\u4e0d\u662f\u4e00\u4e2a\u6574\u6570")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\u7279\u522b\u9002\u5408\u5904\u7406\u5b57\u7b26\u4e32\u8f93\u5165<\/strong>\uff0c\u80fd\u591f\u51c6\u786e\u8bc6\u522b\u6574\u6570\u683c\u5f0f\uff0c\u5305\u62ec\u8d1f\u6574\u6570\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n
\u5728Python\u4e2d\u5224\u65ad\u6574\u6570\u7c7b\u578b\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u5bf9\u4e8e\u4e00\u822c\u7684\u7c7b\u578b\u5224\u65ad\uff0cisinstance()\u662f\u9996\u9009<\/strong>\uff0c\u56e0\u4e3a\u5b83\u7684\u7075\u6d3b\u6027\u548c\u652f\u6301\u7ee7\u627f\u5173\u7cfb\u7684\u7279\u6027\u3002\u800ctype()\u51fd\u6570\u5219\u9002\u7528\u4e8e\u9700\u8981\u4e25\u683c\u5224\u65ad\u7c7b\u578b\u7684\u573a\u5408\u3002\u5bf9\u4e8e\u7279\u6b8a\u573a\u666f\uff0c\u5982\u5b57\u7b26\u4e32\u8f93\u5165\u6216\u6d6e\u70b9\u6570\u6574\u6570\u6027\u5224\u65ad\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u548c\u81ea\u5b9a\u4e49\u51fd\u6570\u4e5f\u63d0\u4f9b\u4e86\u6709\u6548\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684isinstance()<\/code>\u51fd\u6570\u6765\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
x = 10\nif isinstance(x, int):\n    print("x\u662f\u4e00\u4e2a\u6574\u6570")\nelse:\n    print("x\u4e0d\u662f\u4e00\u4e2a\u6574\u6570")\n<\/code><\/pre>\n
\u8be5\u65b9\u6cd5\u4e0d\u4ec5\u9002\u7528\u4e8ePython 3\u4e2d\u7684\u666e\u901a\u6574\u6570\uff0c\u8fd8\u80fd\u6709\u6548\u5224\u65adPython 2\u4e2d\u7684\u957f\u6574\u578b\u3002<\/p>\n
Python\u4e2d\u5982\u4f55\u533a\u5206\u6574\u6570\u548c\u6d6e\u70b9\u6570\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u6574\u6570\u548c\u6d6e\u70b9\u6570\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\u3002\u53ef\u4ee5\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\u6765\u533a\u5206\u5b83\u4eec\uff0c\u4f8b\u5982\uff1a  <\/p>\n
x = 10.5\nif isinstance(x, float):\n    print("x\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570")\nelif isinstance(x, int):\n    print("x\u662f\u4e00\u4e2a\u6574\u6570")\n<\/code><\/pre>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8f7b\u677e\u8bc6\u522b\u53d8\u91cf\u7684\u7c7b\u578b\u5e76\u505a\u51fa\u76f8\u5e94\u5904\u7406\u3002<\/p>\n
\u5728Python\u4e2d\u5982\u4f55\u5904\u7406\u975e\u6574\u6570\u7c7b\u578b\uff1f<\/strong>
\u5f53\u5904\u7406\u7528\u6237\u8f93\u5165\u6216\u8005\u5916\u90e8\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u975e\u6574\u6570\u7c7b\u578b\u3002\u53ef\u4ee5\u4f7f\u7528try...except<\/code>\u7ed3\u6784\u6765\u6355\u83b7\u5f02\u5e38\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\uff1a  <\/p>\n
user_input = input("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff1a")\ntry:\n    num = int(user_input)\n    print(f"\u60a8\u8f93\u5165\u7684\u6574\u6570\u662f\uff1a{num}")\nexcept ValueError:\n    print("\u8f93\u5165\u7684\u4e0d\u662f\u4e00\u4e2a\u6709\u6548\u7684\u6574\u6570")\n<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u6cd5\u80fd\u591f\u6709\u6548\u5730\u5904\u7406\u7c7b\u578b\u8f6c\u6362\u9519\u8bef\uff0c\u786e\u4fdd\u7528\u6237\u8f93\u5165\u7684\u6709\u6548\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u662f\u5426\u4e3a\u6574\u6570\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528isinstance()\u51fd\u6570\u3001type()\u51fd\u6570\u3001\u6570\u5b57\u7c7b\u578b\u7684 […]","protected":false},"author":3,"featured_media":954312,"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\/954305"}],"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=954305"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/954305\/revisions"}],"predecessor-version":[{"id":954313,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/954305\/revisions\/954313"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/954312"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=954305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=954305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=954305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}