{"id":1100484,"date":"2025-01-08T15:40:22","date_gmt":"2025-01-08T07:40:22","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1100484.html"},"modified":"2025-01-08T15:40:25","modified_gmt":"2025-01-08T07:40:25","slug":"python%e5%a6%82%e4%bd%95%e5%8f%96%e6%9f%90%e5%ad%97%e7%ac%a6%e5%89%8d%e9%9d%a2%e7%9a%84%e6%95%b0%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1100484.html","title":{"rendered":"python\u5982\u4f55\u53d6\u67d0\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c"},"content":{"rendered":"

\"python\u5982\u4f55\u53d6\u67d0\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c\"<\/p>\n

\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u6765\u83b7\u53d6\u67d0\u4e2a\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c<\/strong>\u3002\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u4ee5\u53ca\u5185\u7f6e\u51fd\u6570\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u4e00\u79cd\u5e38\u7528\u7684\u65b9\u5f0f\uff1a\u5b57\u7b26\u4e32\u5207\u7247<\/strong>\u3002<\/p>\n<\/p>\n

\u5b57\u7b26\u4e32\u5207\u7247\u662f\u4e00\u79cd\u975e\u5e38\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u6765\u83b7\u53d6\u7279\u5b9a\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c<\/strong>\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32"123abc456"<\/code>\uff0c\u6211\u4eec\u8981\u83b7\u53d6\u5b57\u7b26"a"<\/code>\u524d\u9762\u7684\u6570\u503c"123"<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u5207\u7247\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u51e0\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4ee3\u7801\u793a\u4f8b\u6765\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b57\u7b26\u4e32\u5207\u7247<\/h3>\n<\/p>\n

\u5b57\u7b26\u4e32\u5207\u7247\u662fPython\u4e2d\u6700\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\u4e4b\u4e00\u3002\u901a\u8fc7\u5207\u7247\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u83b7\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e00\u90e8\u5206\u3002\u5047\u8bbe\u6211\u4eec\u8981\u83b7\u53d6\u5b57\u7b26"a"<\/code>\u524d\u9762\u7684\u6570\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u627e\u5230\u5b57\u7b26"a"<\/code>\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u6765\u83b7\u53d6\u5176\u524d\u9762\u7684\u90e8\u5206\u3002<\/p>\n<\/p>\n

string = "123abc456"<\/p>\n
char = 'a'<\/p>\n
index = string.find(char)<\/p>\n
if index != -1:  # \u68c0\u67e5\u5b57\u7b26\u662f\u5426\u5b58\u5728<\/p>\n
    num_str = string[:index]<\/p>\n
    print(num_str)  # \u8f93\u51fa\uff1a123<\/p>\n
else:<\/p>\n
    print("\u5b57\u7b26\u4e0d\u5b58\u5728")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u9996\u5148\u4f7f\u7528find<\/code>\u65b9\u6cd5\u627e\u5230\u5b57\u7b26"a"<\/code>\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5cstring[:index]<\/code>\u83b7\u53d6\u5176\u524d\u9762\u7684\u90e8\u5206\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5339\u914d\u5de5\u5177\uff0c\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u627e\u5230\u7279\u5b9a\u6a21\u5f0f\u7684\u5b57\u7b26\u4e32\u3002\u5047\u8bbe\u6211\u4eec\u8981\u83b7\u53d6\u5b57\u7b26"a"<\/code>\u524d\u9762\u7684\u6570\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
import re<\/p>\n
string = "123abc456"<\/p>\n
pattern = r'(\\d+)a'<\/p>\n
match = re.search(pattern, string)<\/p>\n
if match:<\/p>\n
    num_str = match.group(1)<\/p>\n
    print(num_str)  # \u8f93\u51fa\uff1a123<\/p>\n
else:<\/p>\n
    print("\u5339\u914d\u5931\u8d25")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cpattern<\/code>\u8868\u793a\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5176\u4e2d(\\d+)<\/code>\u8868\u793a\u5339\u914d\u4e00\u4e2a\u6216\u591a\u4e2a\u6570\u5b57\uff0ca<\/code>\u8868\u793a\u5339\u914d\u5b57\u7b26"a"<\/code>\u3002\u4f7f\u7528re.search<\/code>\u65b9\u6cd5\u53ef\u4ee5\u627e\u5230\u5339\u914d\u7684\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u901a\u8fc7group<\/code>\u65b9\u6cd5\u83b7\u53d6\u5339\u914d\u7684\u6570\u503c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u5185\u7f6e\u51fd\u6570<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5185\u7f6e\u51fd\u6570\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u65b9\u4fbf\u5730\u5904\u7406\u5b57\u7b26\u4e32\u3002\u6bd4\u5982\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u89e3\u6790\u548cisdigit<\/code>\u65b9\u6cd5\u6765\u8fc7\u6ee4\u51fa\u6570\u5b57\u90e8\u5206\u3002<\/p>\n<\/p>\n
string = "123abc456"<\/p>\n
num_str = ''.join([char for char in string if char.isdigit()])<\/p>\n
print(num_str)  # \u8f93\u51fa\uff1a123456<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528\u5217\u8868\u89e3\u6790\u548cisdigit<\/code>\u65b9\u6cd5\u8fc7\u6ee4\u51fa\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u6570\u5b57\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5206\u5272\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u5b57\u7b26\u4e32\u7684split<\/code>\u65b9\u6cd5\uff0c\u5c06\u5b57\u7b26\u4e32\u6309\u7167\u7279\u5b9a\u5b57\u7b26\u5206\u5272\uff0c\u7136\u540e\u83b7\u53d6\u5206\u5272\u540e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
string = "123abc456"<\/p>\n
char = 'a'<\/p>\n
parts = string.split(char)<\/p>\n
if len(parts) > 1:<\/p>\n
    num_str = parts[0]<\/p>\n
    print(num_str)  # \u8f93\u51fa\uff1a123<\/p>\n
else:<\/p>\n
    print("\u5b57\u7b26\u4e0d\u5b58\u5728")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528split<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u6309\u7167\u5b57\u7b26"a"<\/code>\u5206\u5272\uff0c\u7136\u540e\u83b7\u53d6\u5206\u5272\u540e\u7684\u7b2c\u4e00\u4e2a\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
\u603b\u7ed3<\/h3>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u83b7\u53d6\u67d0\u4e2a\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c\u3002\u5177\u4f53\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u548c\u5b57\u7b26\u4e32\u7684\u590d\u6742\u7a0b\u5ea6\u6765\u51b3\u5b9a\u3002\u5b57\u7b26\u4e32\u5207\u7247\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u6700\u5e38\u7528\u7684\u4e24\u79cd\u65b9\u6cd5\uff0c\u524d\u8005\u9002\u7528\u4e8e\u7b80\u5355\u60c5\u51b5\uff0c\u540e\u8005\u9002\u7528\u4e8e\u590d\u6742\u6a21\u5f0f\u5339\u914d\u3002\u5185\u7f6e\u51fd\u6570\u548c\u5b57\u7b26\u4e32\u5206\u5272\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u5728\u7279\u5b9a\u573a\u666f\u4e0b\u63d0\u4f9b\u4fbf\u5229\u3002\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u9700\u8981\u786e\u4fdd\u4ee3\u7801\u7684\u5065\u58ee\u6027\uff0c\u5904\u7406\u597d\u53ef\u80fd\u51fa\u73b0\u7684\u5f02\u5e38\u60c5\u51b5\uff0c\u6bd4\u5982\u5b57\u7b26\u4e0d\u5b58\u5728\u6216\u5b57\u7b26\u4e32\u683c\u5f0f\u4e0d\u7b26\u5408\u9884\u671f\u7b49\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u63d0\u53d6\u7279\u5b9a\u5b57\u7b26\u524d\u7684\u6570\u503c\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u63d0\u53d6\u7279\u5b9a\u5b57\u7b26\u524d\u7684\u6570\u503c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528str.split()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u8f7b\u677e\u5206\u5272\u5b57\u7b26\u4e32\u5e76\u83b7\u53d6\u6240\u9700\u90e8\u5206\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a  <\/p>\n
text = "\u4ef7\u683c\u662f100\u5143"\nnumber = text.split("\u662f")[1].split("\u5143")[0]\nprint(number)  # \u8f93\u51fa\uff1a100\n<\/code><\/pre>\n
\u6b64\u5916\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u66f4\u52a0\u7075\u6d3b\u5730\u5339\u914d\u590d\u6742\u7684\u5b57\u7b26\u4e32\u6a21\u5f0f\u3002\u53ef\u4ee5\u5bfc\u5165re<\/code>\u6a21\u5757\uff0c\u4f7f\u7528re.search()<\/code>\u51fd\u6570\u6765\u63d0\u53d6\u6240\u9700\u6570\u503c\u3002<\/p>\n
\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u7279\u5b9a\u5b57\u7b26\u7684\u4f4d\u7f6e\u53ef\u4ee5\u4f7f\u7528\u54ea\u4e9b\u65b9\u6cd5\uff1f<\/strong>
\u5728Python\u4e2d\uff0cstr.find()<\/code>\u548cstr.index()<\/code>\u65b9\u6cd5\u90fd\u53ef\u4ee5\u7528\u6765\u67e5\u627e\u7279\u5b9a\u5b57\u7b26\u7684\u4f4d\u7f6e\u3002str.find()<\/code>\u8fd4\u56de\u5b57\u7b26\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u672a\u627e\u5230\u5219\u8fd4\u56de-1\uff1b\u800cstr.index()<\/code>\u5219\u4f1a\u5728\u672a\u627e\u5230\u65f6\u629b\u51fa\u5f02\u5e38\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u51c6\u786e\u83b7\u53d6\u5b57\u7b26\u7684\u7d22\u5f15\uff0c\u4ece\u800c\u63d0\u53d6\u8be5\u5b57\u7b26\u524d\u7684\u6570\u503c\u3002<\/p>\n
\u5982\u679c\u6211\u60f3\u63d0\u53d6\u591a\u4e2a\u6570\u5b57\uff0c\u5e94\u8be5\u5982\u4f55\u5904\u7406\uff1f<\/strong>
\u82e5\u60f3\u63d0\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u6570\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u7684re.findall()<\/code>\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u6240\u6709\u5339\u914d\u7684\u7ed3\u679c\uff0c\u9002\u5408\u5904\u7406\u590d\u6742\u5b57\u7b26\u4e32\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a  <\/p>\n
import re\n\ntext = "\u57282021\u5e74\u67091000\u4ef6\u5546\u54c1\uff0c2022\u5e74\u67091500\u4ef6\u5546\u54c1\u3002"\nnumbers = re.findall(r'\\d+', text)\nprint(numbers)  # \u8f93\u51fa\uff1a['2021', '1000', '2022', '1500']\n<\/code><\/pre>\n
\u8fd9\u6837\u53ef\u4ee5\u83b7\u53d6\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u7684\u6570\u5b57\uff0c\u65b9\u4fbf\u540e\u7eed\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u6765\u83b7\u53d6\u67d0\u4e2a\u5b57\u7b26\u524d\u9762\u7684\u6570\u503c\u3002\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u4ee5\u53ca\u5185\u7f6e\u51fd […]","protected":false},"author":3,"featured_media":1100488,"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\/1100484"}],"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=1100484"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1100484\/revisions"}],"predecessor-version":[{"id":1100491,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1100484\/revisions\/1100491"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1100488"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1100484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1100484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1100484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}