{"id":1097616,"date":"2025-01-08T15:13:34","date_gmt":"2025-01-08T07:13:34","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1097616.html"},"modified":"2025-01-08T15:13:37","modified_gmt":"2025-01-08T07:13:37","slug":"%e5%9c%a8python%e4%b8%ad%e5%a6%82%e4%bd%95%e6%8b%bc%e6%8e%a5%e5%ad%97%e7%ac%a6%e4%b8%b2-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1097616.html","title":{"rendered":"\u5728Python\u4e2d\u5982\u4f55\u62fc\u63a5\u5b57\u7b26\u4e32"},"content":{"rendered":"

\"\u5728Python\u4e2d\u5982\u4f55\u62fc\u63a5\u5b57\u7b26\u4e32\"<\/p>\n

\u5728Python\u4e2d\uff0c\u62fc\u63a5\u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26\u3001\u4f7f\u7528join()\u65b9\u6cd5\u3001\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001\u4ee5\u53ca\u4f7f\u7528f\u5b57\u7b26\u4e32\u3002<\/strong> \u5176\u4e2d\uff0c\u4f7f\u7528join()\u65b9\u6cd5\u8f83\u4e3a\u9ad8\u6548\uff0c\u56e0\u4e3a\u5b83\u662f\u76f4\u63a5\u5728\u5185\u5b58\u4e2d\u6784\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u63cf\u8ff0\u6bcf\u79cd\u65b9\u6cd5\uff0c\u5e76\u8ba8\u8bba\u5b83\u4eec\u7684\u4f18\u52a3\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26<\/h3>\n<\/p>\n

\u4f7f\u7528\u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26\u662f\u6700\u76f4\u63a5\u3001\u6700\u5bb9\u6613\u7406\u89e3\u7684\u65b9\u6cd5\u3002\u5b83\u5c06\u4e24\u4e2a\u6216\u591a\u4e2a\u5b57\u7b26\u4e32\u8fde\u63a5\u5728\u4e00\u8d77\u3002 <\/p>\n<\/p>\n

str1 = "Hello"<\/p>\n
str2 = "World"<\/p>\n
result = str1 + " " + str2<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e00\u65b9\u6cd5\u7b80\u5355\u76f4\u89c2\uff0c\u9002\u5408\u62fc\u63a5\u5c11\u91cf\u5b57\u7b26\u4e32\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u9700\u8981\u62fc\u63a5\u5927\u91cf\u5b57\u7b26\u4e32\uff0c\u8fd9\u79cd\u65b9\u6cd5\u7684\u6548\u7387\u8f83\u4f4e\uff0c\u56e0\u4e3a\u6bcf\u6b21\u4f7f\u7528\u52a0\u53f7\u64cd\u4f5c\u7b26\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5185\u5b58\u5f00\u9500\u8f83\u5927\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528join()\u65b9\u6cd5<\/h3>\n<\/p>\n
\u4f7f\u7528join()\u65b9\u6cd5\u662f\u66f4\u9ad8\u6548\u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u65b9\u5f0f\uff0c\u7279\u522b\u9002\u7528\u4e8e\u62fc\u63a5\u5927\u91cf\u5b57\u7b26\u4e32\u3002<\/strong><\/p>\n<\/p>\n
str_list = ["Hello", "World", "from", "Python"]<\/p>\n
result = " ".join(str_list)<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
join()\u65b9\u6cd5\u901a\u8fc7\u4e00\u6b21\u6027\u5206\u914d\u5185\u5b58\u6765\u521b\u5efa\u65b0\u5b57\u7b26\u4e32\uff0c\u907f\u514d\u4e86\u591a\u6b21\u521b\u5efa\u548c\u9500\u6bc1\u4e34\u65f6\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u56e0\u6b64\u6027\u80fd\u66f4\u597d\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u65b9\u6cd5\u6765\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u5305\u62ec\u767e\u5206\u53f7\uff08%\uff09\u683c\u5f0f\u5316\u548cstr.format()\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
1. \u767e\u5206\u53f7\uff08%\uff09\u683c\u5f0f\u5316<\/h4>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u8f83\u4e3a\u53e4\u8001\uff0c\u4f46\u4ecd\u7136\u5728\u67d0\u4e9b\u573a\u666f\u4e2d\u88ab\u4f7f\u7528\u3002<\/p>\n<\/p>\n
name = "John"<\/p>\n
age = 30<\/p>\n
result = "My name is %s and I am %d years old." % (name, age)<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. str.format()\u65b9\u6cd5<\/h4>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u66f4\u4e3a\u73b0\u4ee3\u548c\u7075\u6d3b\u3002<\/p>\n<\/p>\n
name = "John"<\/p>\n
age = 30<\/p>\n
result = "My name is {} and I am {} years old.".format(name, age)<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u4f7f\u7528f\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n
f\u5b57\u7b26\u4e32\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5b57\u9762\u503c\uff09\u662fPython 3.6\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u7b80\u6d01\u4e14\u9ad8\u6548\u3002<\/strong><\/p>\n<\/p>\n
name = "John"<\/p>\n
age = 30<\/p>\n
result = f"My name is {name} and I am {age} years old."<\/p>\n
print(result)<\/p>\n
<\/code><\/pre>\n<\/p>\n
f\u5b57\u7b26\u4e32\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e0a\u5b57\u6bcd\u201cf\u201d\u6216\u201cF\u201d\uff0c\u5e76\u5728\u5927\u62ec\u53f7\u5185\u76f4\u63a5\u5d4c\u5165\u8868\u8fbe\u5f0f\uff0c\u975e\u5e38\u76f4\u89c2\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u6548\u7387\u5bf9\u6bd4<\/h3>\n<\/p>\n
\u5728\u9009\u62e9\u5b57\u7b26\u4e32\u62fc\u63a5\u65b9\u6cd5\u65f6\uff0c\u6548\u7387\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u4ee5\u4e0b\u662f\u5bf9\u51e0\u79cd\u65b9\u6cd5\u7684\u6548\u7387\u5206\u6790\uff1a<\/p>\n<\/p>\n
    \n
  • \u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26<\/strong>\uff1a\u9002\u7528\u4e8e\u5c11\u91cf\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\uff0c\u7b80\u5355\u76f4\u89c2\uff0c\u4f46\u6548\u7387\u4f4e\u3002<\/li>\n
  • join()\u65b9\u6cd5<\/strong>\uff1a\u9002\u7528\u4e8e\u5927\u91cf\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\uff0c\u6548\u7387\u9ad8\u3002<\/li>\n
  • \u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/strong>\uff1astr.format()\u65b9\u6cd5\u548cf\u5b57\u7b26\u4e32\u90fd\u63d0\u4f9b\u4e86\u8f83\u4e3a\u7075\u6d3b\u7684\u62fc\u63a5\u65b9\u5f0f\uff0c\u63a8\u8350\u5728\u9700\u8981\u66f4\u591a\u683c\u5f0f\u5316\u63a7\u5236\u65f6\u4f7f\u7528\u3002<\/li>\n
  • f\u5b57\u7b26\u4e32<\/strong>\uff1a\u5728Python 3.6\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u63a8\u8350\u4f7f\u7528f\u5b57\u7b26\u4e32\uff0c\u56e0\u4e3a\u5b83\u8bed\u6cd5\u7b80\u6d01\u4e14\u9ad8\u6548\u3002<\/li>\n<\/ul>\n
    \u516d\u3001\u5177\u4f53\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n
    1. \u62fc\u63a5\u6587\u4ef6\u8def\u5f84<\/h4>\n<\/p>\n
    \u5728\u5904\u7406\u6587\u4ef6\u8def\u5f84\u65f6\uff0c\u4f7f\u7528os.path.join()\u65b9\u6cd5\u53ef\u4ee5\u786e\u4fdd\u8def\u5f84\u5206\u9694\u7b26\u7684\u6b63\u786e\u6027\u3002<\/p>\n<\/p>\n
    import os<\/p>\n
    folder = "\/home\/user"<\/p>\n
    file = "document.txt"<\/p>\n
    path = os.path.join(folder, file)<\/p>\n
    print(path)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    2. \u6784\u5efaSQL\u67e5\u8be2\u8bed\u53e5<\/h4>\n<\/p>\n
    \u5728\u6784\u5efaSQL\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u63a8\u8350\u4f7f\u7528\u5360\u4f4d\u7b26\u548c\u53c2\u6570\u5316\u67e5\u8be2\uff0c\u907f\u514dSQL\u6ce8\u5165\u653b\u51fb\u3002<\/p>\n<\/p>\n
    query = "SELECT * FROM users WHERE name = %s AND age = %s"<\/p>\n
    params = (name, age)<\/p>\n
    cursor.execute(query, params)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    3. \u52a8\u6001\u751f\u6210HTML\u5185\u5bb9<\/h4>\n<\/p>\n
    \u5728\u751f\u6210HTML\u5185\u5bb9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6a21\u677f\u5f15\u64ce\uff08\u5982Jinja2\uff09\u6216f\u5b57\u7b26\u4e32\u8fdb\u884c\u52a8\u6001\u62fc\u63a5\u3002<\/p>\n<\/p>\n
    title = "Welcome"<\/p>\n
    content = "Hello, World!"<\/p>\n
    html = f"<html><head><title>{title}<\/title><\/head><body>{content}<\/body><\/html>"<\/p>\n
    print(html)<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
    \u5728Python\u4e2d\uff0c\u62fc\u63a5\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u5305\u62ec\u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26\u3001join()\u65b9\u6cd5\u3001\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001f\u5b57\u7b26\u4e32\u7b49\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u573a\u666f\u548c\u4f18\u52a3\u3002\u5bf9\u4e8e\u5c11\u91cf\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u4f7f\u7528\u52a0\u53f7\u64cd\u4f5c\u7b26\u548cf\u5b57\u7b26\u4e32\u66f4\u52a0\u7b80\u6d01\uff1b\u5bf9\u4e8e\u5927\u91cf\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u4f7f\u7528join()\u65b9\u6cd5\u66f4\u4e3a\u9ad8\u6548\uff1b\u5728\u9700\u8981\u66f4\u591a\u683c\u5f0f\u5316\u63a7\u5236\u65f6\uff0c\u4f7f\u7528str.format()\u65b9\u6cd5\u3002<\/strong> \u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u4fdd\u8bc1\u4ee3\u7801\u7b80\u6d01\u7684\u540c\u65f6\uff0c\u63d0\u5347\u6027\u80fd\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u5728Python\u4e2d\u9ad8\u6548\u62fc\u63a5\u591a\u4e2a\u5b57\u7b26\u4e32\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\u6765\u9ad8\u6548\u62fc\u63a5\u591a\u4e2a\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u4f7f\u7528join()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u5217\u8868\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8fd9\u662f\u5904\u7406\u591a\u4e2a\u5b57\u7b26\u4e32\u62fc\u63a5\u7684\u63a8\u8350\u65b9\u5f0f\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
    str_list = ["Hello", "World", "Python"]\nresult = " ".join(str_list)\nprint(result)  # \u8f93\u51fa: Hello World Python\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u5f0f\u5728\u5904\u7406\u5927\u91cf\u5b57\u7b26\u4e32\u65f6\uff0c\u6027\u80fd\u66f4\u4f73\u3002<\/p>\n
    \u4f7f\u7528\u52a0\u6cd5\u8fd0\u7b97\u7b26\u62fc\u63a5\u5b57\u7b26\u4e32\u6709\u4ec0\u4e48\u6ce8\u610f\u4e8b\u9879\uff1f<\/strong>
    \u4f7f\u7528\u52a0\u6cd5\u8fd0\u7b97\u7b26\uff08+<\/code>\uff09\u53ef\u4ee5\u7b80\u5355\u5730\u5c06\u4e24\u4e2a\u5b57\u7b26\u4e32\u62fc\u63a5\u5728\u4e00\u8d77\uff0c\u4f46\u5728\u62fc\u63a5\u591a\u4e2a\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u4e3a\u6bcf\u6b21\u62fc\u63a5\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002\u56e0\u6b64\uff0c\u5982\u679c\u9700\u8981\u9891\u7e41\u62fc\u63a5\uff0c\u5efa\u8bae\u4f7f\u7528join()<\/code>\u65b9\u6cd5\u6216StringIO<\/code>\u6a21\u5757\u6765\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n
    \u5728Python\u4e2d\uff0c\u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u8fdb\u884c\u62fc\u63a5\uff1f<\/strong>
    \u786e\u5b9e\u53ef\u4ee5\u3002\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff08f-strings\uff09\u6765\u62fc\u63a5\u5b57\u7b26\u4e32\uff0c\u8fd9\u662f\u4ecePython 3.6\u7248\u672c\u5f00\u59cb\u5f15\u5165\u7684\u7279\u6027\u3002\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u5d4c\u5165\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4e3a\u7075\u6d3b\u7684\u62fc\u63a5\u3002\u4f8b\u5982\uff1a<\/p>\n
    name = "Alice"\nage = 30\nresult = f"{name} is {age} years old."\nprint(result)  # \u8f93\u51fa: Alice is 30 years old.\n<\/code><\/pre>\n
    \u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u4f7f\u62fc\u63a5\u66f4\u7b80\u6d01\uff0c\u8fd8\u63d0\u9ad8\u4e86\u53ef\u8bfb\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u62fc\u63a5\u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u52a0\u53f7\uff08+\uff09\u64cd\u4f5c\u7b26\u3001\u4f7f\u7528join()\u65b9\u6cd5\u3001\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001\u4ee5\u53ca\u4f7f […]","protected":false},"author":3,"featured_media":1097624,"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\/1097616"}],"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=1097616"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1097616\/revisions"}],"predecessor-version":[{"id":1097629,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1097616\/revisions\/1097629"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1097624"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1097616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1097616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1097616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}