{"id":62,"date":"2026-08-05T23:37:45","date_gmt":"2026-08-05T15:37:45","guid":{"rendered":"https:\/\/ltrainyard.icu\/?p=62"},"modified":"2026-08-06T00:42:08","modified_gmt":"2026-08-05T16:42:08","slug":"day-3-%e8%bf%90%e7%ae%97%e7%ac%a6%e4%b8%8e%e8%a1%a8%e8%be%be%e5%bc%8f%ef%bc%9a%e5%8a%a0%e5%87%8f%e4%b9%98%e9%99%a4%e3%80%81%e6%95%b4%e9%99%a4%e3%80%81%e5%8f%96%e4%bd%99%e4%b8%8e%e4%bc%98%e5%85%88","status":"publish","type":"post","link":"https:\/\/ltrainyard.icu\/index.php\/2026\/08\/05\/day-3-%e8%bf%90%e7%ae%97%e7%ac%a6%e4%b8%8e%e8%a1%a8%e8%be%be%e5%bc%8f%ef%bc%9a%e5%8a%a0%e5%87%8f%e4%b9%98%e9%99%a4%e3%80%81%e6%95%b4%e9%99%a4%e3%80%81%e5%8f%96%e4%bd%99%e4%b8%8e%e4%bc%98%e5%85%88\/","title":{"rendered":"| Day 3 | \u8fd0\u7b97\u7b26\u4e0e\u8868\u8fbe\u5f0f\uff1a\u52a0\u51cf\u4e58\u9664\u3001\u6574\u9664\u3001\u53d6\u4f59\u4e0e\u4f18\u5148\u7ea7 |"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">1 \u7b97\u672f\u8fd0\u7b97\u7b26 \u2014\u2014 \u8ba9\u7a0b\u5e8f\u4f1a\u7b97\u6570<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u5b66\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7b97\u672f\u8fd0\u7b97\u7b26<\/strong>\u5c31\u662f\u6570\u5b66\u91cc\u7684\u52a0\u51cf\u4e58\u9664\u5728 Python \u91cc\u7684\u5199\u6cd5\uff0c\u5916\u52a0\u4e09\u4e2a\u300c\u52a0\u5f3a\u7248\u300d\uff1a\u6574\u9664 <code>\/\/<\/code>\u3001\u53d6\u4f59 <code>%<\/code>\u3001\u5e42 <code>**<\/code>\u3002\u4e3a\u4ec0\u4e48\u96f6\u57fa\u7840\u5fc5\u5b66\uff1f\u56e0\u4e3a\u7a0b\u5e8f\u7684\u6838\u5fc3\u5de5\u4f5c\u4e4b\u4e00\u5c31\u662f<strong>\u8ba1\u7b97<\/strong>\u2014\u2014\u7b97\u4ef7\u683c\u3001\u7b97\u5206\u6570\u3001\u7b97\u65f6\u95f4\uff0c\u5168\u662f\u7b97\u672f\u8fd0\u7b97\u7b26\u3002\u800c\u4e14 <code>\/\/<\/code> \u548c <code>%<\/code> \u7684\u7ec4\u5408\uff08\u5546\u548c\u4f59\u6570\uff09\u662f\u5f88\u591a\u7ecf\u5178\u7b97\u6cd5\u7684\u5730\u57fa\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e95\u5c42\u539f\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51e0\u4e2a\u5bb9\u6613\u61f5\u7684\u7ec6\u8282\uff0c\u539f\u7406\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/<\/code> \u9664\u6cd5<strong>\u6c38\u8fdc\u8fd4\u56de\u5c0f\u6570<\/strong>\uff08float\uff09\uff0c\u5373\u4f7f\u80fd\u6574\u9664\uff1a<code>4 \/ 2<\/code> \u5f97\u5230 <code>2.0<\/code>\u3002<\/li>\n\n\n\n<li><code>\/\/<\/code> \u6574\u9664\u662f\u300c<strong>\u5411\u4e0b\u53d6\u6574<\/strong>\u300d\uff1a<code>7 \/\/ 2<\/code> \u662f 3\uff0c\u800c <code>-7 \/\/ 2<\/code> \u662f <strong>-4<\/strong>\uff08\u4e0d\u662f -3\uff09\u2014\u2014\u56e0\u4e3a\u5b83\u627e\u7684\u662f\u300c\u5c0f\u4e8e\u7b49\u4e8e\u7ed3\u679c\u7684\u6700\u5927\u6574\u6570\u300d\u3002<\/li>\n\n\n\n<li><code>%<\/code> \u53d6\u4f59\u6ee1\u8db3\u516c\u5f0f\uff1a<code>\u88ab\u9664\u6570 = \u5546 \u00d7 \u9664\u6570 + \u4f59\u6570<\/code>\uff0c\u5373 <code>7 = 3 \u00d7 2 + 1<\/code>\u3002<\/li>\n\n\n\n<li>\u8fd0\u7b97\u6709<strong>\u4f18\u5148\u7ea7<\/strong>\uff1a\u5148\u7b97\u4e58\u65b9\u3001\u518d\u7b97\u4e58\u9664\u3001\u6700\u540e\u7b97\u52a0\u51cf\uff0c\u548c\u6570\u5b66\u8bfe\u5b66\u7684\u4e00\u6837\uff1b\u540c\u7ea7\u4ece\u5de6\u5230\u53f3\u3002<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u672f\u8bed\u5c0f\u8bcd\u5178\uff1a<strong>\u4f18\u5148\u7ea7<\/strong>\uff08precedence\uff09\u5c31\u662f\u300c\u591a\u4e2a\u8fd0\u7b97\u7b26\u6253\u67b6\u65f6\u8c01\u5148\u7b97\u300d\u3002\u62ec\u53f7 <code>()<\/code> \u6c38\u8fdc\u662f\u6700\u9ad8\u4f18\u5148\u7ea7\u2014\u2014\u62ff\u4e0d\u51c6\u5c31\u52a0\u62ec\u53f7\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u751f\u6d3b\u7c7b\u6bd4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b97\u672f\u8fd0\u7b97\u7b26\u50cf<strong>\u8d85\u5e02\u6536\u94f6\u673a<\/strong>\uff1a<code>+<\/code> \u662f\u5408\u5e76\u4ef7\u7b7e\uff0c<code>-<\/code> \u662f\u6298\u6263\uff0c<code>*<\/code> \u662f\u300c3 \u74f6\u540c\u4ef7\u996e\u6599\u300d\u7684\u603b\u4ef7\uff0c<code>\/<\/code> \u662f AA \u5236\u5e73\u5206\u3002<code>\/\/<\/code> \u662f\u300c3 \u4e2a\u4eba\u5206 7 \u4e2a\u82f9\u679c\uff0c\u6bcf\u4eba\u5148\u62ff\u51e0\u4e2a\uff083 \u4e2a\uff09\uff0c\u5269\u4e0b\u51e0\u4e2a\uff081 \u4e2a\uff09\u5c31\u662f <code>%<\/code>\u300d\u2014\u2014\u5546\u5f52\u5546\uff0c\u4f59\u5f52\u4f59\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u4e8b\u9879\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 <strong>\u56db\u5219\u8fd0\u7b97<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(7 + 3)    # \u52a0\u6cd5\uff1a10\nprint(7 - 3)    # \u51cf\u6cd5\uff1a4\nprint(7 * 3)    # \u4e58\u6cd5\uff1a21\nprint(7 \/ 2)    # \u9664\u6cd5\uff1a3.5\uff08\u7ed3\u679c\u662f\u5c0f\u6570\uff09\nprint(4 \/ 2)    # \u6ce8\u610f\uff1a4 \u00f7 2 = 2.0\uff0c\u9664\u6cd5\u7ed3\u679c\u603b\u662f\u5c0f\u6570\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>10\n4\n21\n3.5\n2.0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">2 <strong>\u6574\u9664\u3001\u53d6\u4f59\u3001\u5e42<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(7 \/\/ 2)     # 3\uff1a7 \u91cc\u9762\u6700\u591a\u6709\u51e0\u4e2a\u5b8c\u6574\u7684 2\nprint(7 % 2)      # 1\uff1a\u5206\u5b8c 2 \u4e4b\u540e\u5269\u591a\u5c11\nprint(2 ** 10)    # 1024\uff1a2 \u7684 10 \u6b21\u65b9\nprint(-7 \/\/ 2)    # -4\uff1a\u6ce8\u610f\u662f\u5411\u4e0b\u53d6\u6574\uff0c\u4e0d\u662f -3\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>3\n1\n1024\n-4\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">3 <strong>\u4f18\u5148\u7ea7\u4e0e\u62ec\u53f7<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(2 + 3 * 4)      # 14\uff1a\u5148\u4e58\u540e\u52a0\nprint((2 + 3) * 4)    # 20\uff1a\u62ec\u53f7\u4f18\u5148\nprint(2 ** 3 * 2)     # 16\uff1a\u5148\u7b97 2**3=8\uff0c\u518d\u4e58 2\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u62ec\u53f7\u662f\u300c\u63d2\u961f\u5361\u300d\uff0c\u60f3\u8ba9\u8c01\u5148\u7b97\u5c31\u6846\u4f4f\u8c01\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4 <strong>\u53d6\u4f59\u7684\u7ecf\u5178\u7528\u9014\u2014\u2014\u5224\u65ad\u5947\u5076<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>num = 17\nprint(num % 2)          # 1\uff1a\u4f59 1 \u8bf4\u660e\u662f\u5947\u6570\nprint(num % 2 == 0)     # False\uff1a17 \u4e0d\u662f\u5076\u6570\nprint(num % 2 == 1)     # True\uff1a17 \u662f\u5947\u6570\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4efb\u4f55\u6574\u6570\u9664\u4ee5 2\uff0c\u4f59\u6570\u53ea\u6709 0 \u6216 1\u2014\u2014\u4f59 0 \u662f\u5076\u6570\uff0c\u4f59 1 \u662f\u5947\u6570\uff0cDay 4 \u5b66 if \u65f6\u4f1a\u76f4\u63a5\u7528\u5230\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6613\u9519\u70b9<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(7 \/ 2)<\/code> \u5374\u4ee5\u4e3a\u7ed3\u679c\u662f <code>3<\/code> \u2192 \u95ee\u9898\uff1a<code>\/<\/code> \u6c38\u8fdc\u8fd4\u56de\u5c0f\u6570\uff0c\u7ed3\u679c\u662f <code>3.5<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u60f3\u8981\u6574\u6570\u7ed3\u679c\u7528 <code>7 \/\/ 2<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(2 ** 3)<\/code> \u5374\u4ee5\u4e3a\u7ed3\u679c\u662f 6 \u2192 \u95ee\u9898\uff1a<code>**<\/code> \u662f\u5e42\u4e0d\u662f\u4e58\uff0c2\u00b3 = 8 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<code>2 ** 3<\/code> \u662f 8\uff0c\u4e58\u6cd5\u7528 <code>*<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(3 + 4 * 2)<\/code> \u4ee5\u4e3a\u7ed3\u679c 14 \u662f\u9519\u7684 \u2192 \u95ee\u9898\uff1a\u4f18\u5148\u7ea7\u662f\u5148\u4e58\u540e\u52a0\uff0c<code>3 + 8 = 11<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u60f3\u5148\u52a0\u5c31\u5199 <code>(3 + 4) * 2<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(10 \/ 0)<\/code> \u2192 \u95ee\u9898\uff1a\u9664\u6570\u4e0d\u80fd\u4e3a 0\uff0c\u62a5 <code>ZeroDivisionError<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u9664\u4e4b\u524d\u5148\u5224\u65ad\u9664\u6570\u4e0d\u4e3a 0\uff08Day 4 \u5b66 if \u540e\u53ef\u4ee5\u5904\u7406\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bb0\u5fc6\u53e3\u8bc0<\/strong>\uff1a\u9664\u53f7\u603b\u662f\u51fa\u5c0f\u6570\uff0c\u6574\u9664\u5411\u4e0b\u53d6\u6574\u6570\uff1b\u4f59\u6570\u914d\u5408\u5546\u4f7f\u7528\uff0c\u62ff\u4e0d\u51c6\u65f6\u52a0\u62ec\u53f7\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2 \u6bd4\u8f83\u8fd0\u7b97\u7b26\u548c\u903b\u8f91\u8fd0\u7b97\u7b26 \u2014\u2014 \u5224\u65ad\u4e0e\u7ec4\u5408<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u5b66\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/strong>\uff08<code>== != &gt; &lt; &gt;= &lt;=<\/code>\uff09\u6bd4\u8f83\u4e24\u4e2a\u503c\uff0c\u7ed3\u679c\u53ea\u6709 <code>True<\/code> \u6216 <code>False<\/code>\uff1b<strong>\u903b\u8f91\u8fd0\u7b97\u7b26<\/strong>\uff08<code>and or not<\/code>\uff09\u628a\u591a\u4e2a\u5224\u65ad\u7ec4\u5408\u6210\u4e00\u4e2a\u7ed3\u8bba\u3002\u4e3a\u4ec0\u4e48\u5fc5\u5b66\uff1f\u56e0\u4e3a\u5b83\u4eec\u662f\u300c\u8ba9\u7a0b\u5e8f\u505a\u51b3\u5b9a\u300d\u7684\u539f\u6599\u2014\u2014Day 4 \u7684 if \u5168\u9760\u5b83\u4eec\u3002\u73b0\u5728\u628a\u539f\u6599\u5907\u597d\uff0c\u660e\u5929\u76f4\u63a5\u5f00\u706b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e95\u5c42\u539f\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u8f83\u8fd0\u7b97\u7b26\u672c\u8d28\u662f\u300c\u95ee\u4e00\u4e2a\u95ee\u9898\u300d\uff0cPython \u7b97\u5b8c\u7ed9\u4f60\u4e00\u4e2a\u5e03\u5c14\u7b54\u6848\uff1a<code>5 &gt; 3<\/code> \u5c31\u662f\u95ee\u300c5 \u5927\u4e8e 3 \u5417\uff1f\u300d\uff0c\u7b54\u6848\u662f <code>True<\/code>\u3002\u903b\u8f91\u8fd0\u7b97\u7b26\u662f\u300c\u7ec4\u5408\u5f00\u5173\u300d\uff1a<code>and<\/code> \u50cf\u4e32\u8054\u7535\u8def\uff08\u4e00\u4e2a\u65ad\u5c31\u5168\u65ad\uff09\uff0c<code>or<\/code> \u50cf\u5e76\u8054\u7535\u8def\uff08\u4e00\u4e2a\u901a\u5c31\u5168\u901a\uff09\uff0c<code>not<\/code> \u50cf\u53cd\u76f8\u5668\uff08\u628a\u771f\u53d8\u5047\u3001\u5047\u53d8\u771f\uff09\u3002\u8fd8\u6709\u4e00\u4e2a\u5927\u5751\uff1a**<code>=<\/code> \u662f\u8d4b\u503c\uff08\u628a\u503c\u653e\u8fdb\u53d8\u91cf\uff09\uff0c<code>==<\/code> \u662f\u5224\u65ad\uff08\u6bd4\u8f83\u4e24\u8fb9\u662f\u5426\u76f8\u7b49\uff09**\u2014\u2014\u4e00\u4e2a\u300c\u52a8\u624b\u300d\uff0c\u4e00\u4e2a\u300c\u63d0\u95ee\u300d\uff0c\u662f\u65b0\u624b\u6700\u5bb9\u6613\u6df7\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u751f\u6d3b\u7c7b\u6bd4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u8f83\u8fd0\u7b97\u7b26\u50cf<strong>\u4f53\u68c0\u62a5\u544a\u4e0a\u7684\u5224\u65ad<\/strong>\uff1a\u300c\u8eab\u9ad8 \u2265 170 \u5417\uff1f\u300d\u2014\u2014\u662f\uff0c\u6253\u52fe\uff08True\uff09\uff0c\u5426\uff0c\u6253\u53c9\uff08False\uff09\u3002\u903b\u8f91\u8fd0\u7b97\u7b26\u50cf<strong>\u9009\u8bfe\u89c4\u5219<\/strong>\uff1a<code>and<\/code> \u662f\u300c\u5fc5\u987b\u6570\u5b66\u53ca\u683c<strong>\u5e76\u4e14<\/strong>\u82f1\u8bed\u53ca\u683c\u624d\u80fd\u6bd5\u4e1a\u300d\uff0c\u7f3a\u4e00\u4e0d\u53ef\uff1b<code>or<\/code> \u662f\u300c\u6709 VIP <strong>\u6216\u8005<\/strong>\u6ee1 100 \u5143\u514d\u8fd0\u8d39\u300d\uff0c\u6ee1\u8db3\u4e00\u4e2a\u5c31\u884c\uff1b<code>not<\/code> \u662f\u300c<strong>\u4e0d<\/strong>\u4e0b\u96e8\u5c31\u51fa\u95e8\u300d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u4e8b\u9879\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 <strong>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>age = 18\nprint(age &gt;= 18)    # True\uff1a\u5927\u4e8e\u7b49\u4e8e\u6210\u7acb\nprint(age == 20)    # False\uff1a18 \u4e0d\u7b49\u4e8e 20\nprint(age != 20)    # True\uff1a\u4e0d\u7b49\u4e8e\u6210\u7acb\nprint(age &lt; 60)     # True\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bcf\u4e2a\u6bd4\u8f83\u90fd\u662f\u4e00\u6b21\u300c\u63d0\u95ee\u300d\uff0cPython \u56de\u7b54 True\uff08\u6210\u7acb\uff09\u6216 False\uff08\u4e0d\u6210\u7acb\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 <strong><code>=<\/code> \u548c <code>==<\/code> \u7684\u533a\u522b<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>score = 80          # \u8d4b\u503c\uff1a\u628a 80 \u5b58\u8fdb score\uff08\u4e00\u4e2a\u7b49\u53f7\uff09\nprint(score == 80)  # \u5224\u65ad\uff1ascore \u662f\u4e0d\u662f\u7b49\u4e8e 80\uff08\u4e24\u4e2a\u7b49\u53f7\uff09\nprint(score == 90)  # \u5224\u65ad\uff1ascore \u662f\u4e0d\u662f\u7b49\u4e8e 90\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>True\nFalse\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5199\u6cd5\u5dee\u4e00\u4e2a\u7b49\u53f7\uff0c\u542b\u4e49\u5929\u5dee\u5730\u522b<\/strong>\u2014\u2014\u5199\u9519\u662f\u65b0\u624b\u7b2c\u4e00\u5927 bug \u6765\u6e90\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3 <strong>\u903b\u8f91\u8fd0\u7b97\u7b26\u7ec4\u5408\u6761\u4ef6<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>score = 85\nprint(score &gt;= 60 and score &lt;= 100)   # True\uff1a\u65e2\u53ca\u683c\u53c8\u5728\u6709\u6548\u8303\u56f4\nprint(score &lt; 60 or score &gt; 90)       # False\uff1a\u6ca1\u6302\u79d1\u4e5f\u4e0d\u662f\u4f18\u79c0\nprint(not score &gt;= 60)                # False\uff1a\u4e0d\u662f\u300c\u6ca1\u53ca\u683c\u300d\u7684\u60c5\u51b5\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>and<\/code> \u4e24\u8fb9\u90fd\u6210\u7acb\u624d True\uff1b<code>or<\/code> \u4e00\u8fb9\u6210\u7acb\u5c31 True\uff1b<code>not<\/code> \u628a\u7ed3\u679c\u53cd\u8fc7\u6765\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4 <strong>\u62ff\u4e0d\u51c6\u4f18\u5148\u7ea7\u5c31\u52a0\u62ec\u53f7<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a, b = 8, 12\nprint(a &gt; 5 and b &lt; 10)          # False\uff1ab &lt; 10 \u4e0d\u6210\u7acb\nprint((a &gt; 5) and (b &gt; 10))      # True\uff1a\u4e24\u8fb9\u90fd\u6210\u7acb\nprint(not (a &gt; 5 and b &gt; 10))    # False\uff1a\u6574\u4f53\u53d6\u53cd\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>and<\/code> \u7684\u4f18\u5148\u7ea7\u9ad8\u4e8e <code>or<\/code>\uff0c\u6df7\u7528\u591a\u4e2a\u903b\u8f91\u8fd0\u7b97\u7b26\u65f6\u6781\u6613\u51fa\u9519\u2014\u2014<strong>\u62ff\u4e0d\u51c6\u5c31\u52a0\u62ec\u53f7<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6613\u9519\u70b9<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>if score = 80<\/code>\uff08\u4e00\u4e2a\u7b49\u53f7\uff09 \u2192 \u95ee\u9898\uff1a\u8fd9\u662f\u8d4b\u503c\u4e0d\u662f\u5224\u65ad\uff0c\u8bed\u6cd5\u4e0a\u5c31\u9519\uff08\u540e\u9762\u5b66 if \u65f6\u4f1a\u62a5 <code>SyntaxError: cannot assign to literal<\/code> \u4e4b\u7c7b\uff09 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<code>if score == 80<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(5 &lt; 3 &lt; 1)<\/code> \u4ee5\u4e3a\u6ca1\u95ee\u9898 \u2192 \u95ee\u9898\uff1aPython \u5141\u8bb8\u8fde\u6bd4\u4f46\u542b\u4e49\u662f\u300c3 \u4ecb\u4e8e 5 \u548c 1 \u4e4b\u95f4\u300d\uff0c\u7ed3\u679c\u4e3a False\uff0c\u5bb9\u6613\u8bfb\u9519 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u62c6\u5f00\u5199 <code>5 &lt; 3 and 3 &lt; 1<\/code>\uff0c\u6216\u52a0\u62ec\u53f7\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>True and False or True<\/code> \u76f4\u63a5\u7b97 \u2192 \u95ee\u9898\uff1a<code>and<\/code> \u5148\u4e8e <code>or<\/code>\uff0c\u7ed3\u679c\u5bb9\u6613\u60f3\u9519 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u52a0\u62ec\u53f7\u660e\u786e\u610f\u56fe\uff1a<code>True and (False or True)<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>\"18\" == 18<\/code> \u4ee5\u4e3a\u76f8\u7b49 \u2192 \u95ee\u9898\uff1a\u5b57\u7b26\u4e32\u548c\u6574\u6570\u6c38\u8fdc\u4e0d\u76f8\u7b49\uff08\u7c7b\u578b\u4e0d\u540c\uff09 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u5148\u8f6c\u6362\u518d\u6bd4\u8f83\uff1a<code>int(\"18\") == 18<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bb0\u5fc6\u53e3\u8bc0<\/strong>\uff1a\u5355\u7b49\u8d4b\u503c\u53cc\u7b49\u95ee\uff0c\u6bd4\u8f83\u51fa\u6765\u662f\u5e03\u5c14\uff1band \u5168\u771f or \u4e00\u771f\uff0cnot \u53cd\u8f6c\u522b\u8bb0\u6df7\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3 \u5b57\u7b26\u4e32\u65b9\u6cd5 \u2014\u2014 \u5904\u7406\u6587\u672c\u7684\u745e\u58eb\u519b\u5200<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u5b66\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5<\/strong>\uff08method\uff09\u5c31\u662f\u300c\u6302\u5728\u6570\u636e\u8eab\u4e0a\u7684\u51fd\u6570\u300d\uff0c\u5b57\u7b26\u4e32\u81ea\u5e26\u4e00\u5806\u73b0\u6210\u6280\u80fd\uff1a<code>strip()<\/code> \u53bb\u7a7a\u683c\u3001<code>upper()<\/code> \u53d8\u5927\u5199\u3001<code>replace()<\/code> \u66ff\u6362\u3001<code>split()<\/code> \u62c6\u5206\u3001<code>join()<\/code> \u62fc\u63a5\u2026\u2026\u4e3a\u4ec0\u4e48\u5fc5\u5b66\uff1f\u56e0\u4e3a\u771f\u5b9e\u7a0b\u5e8f\u91cc\u4e00\u534a\u4ee5\u4e0a\u6570\u636e\u662f<strong>\u6587\u672c<\/strong>\u2014\u2014\u7528\u6237\u8f93\u5165\u3001\u6587\u4ef6\u5185\u5bb9\u3001\u65e5\u5fd7\u4fe1\u606f\uff0c\u4e0d\u4f1a\u5904\u7406\u5b57\u7b26\u4e32\uff0c\u5bf8\u6b65\u96be\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e95\u5c42\u539f\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8c03\u7528\u683c\u5f0f\u662f <code>\u5b57\u7b26\u4e32.\u65b9\u6cd5\u540d()<\/code>\u2014\u2014\u70b9\u548c\u62ec\u53f7\u8868\u793a\u300c\u8ba9\u8fd9\u4e2a\u5b57\u7b26\u4e32\u7528\u5b83\u7684\u65b9\u6cd5\u5e72\u6d3b\u300d\u3002\u4e3a\u4ec0\u4e48\u65b9\u6cd5\u80fd\u300c\u8bb0\u4f4f\u300d\u81ea\u5df1\u662f\u54ea\u4e2a\u5b57\u7b26\u4e32\uff1f\u56e0\u4e3a\u5b57\u7b26\u4e32\u5728\u5185\u5b58\u91cc\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u65b9\u6cd5\u5929\u7136\u77e5\u9053\u300c\u6211\u662f\u8c01\u300d\uff0c\u6240\u4ee5 <code>text.upper()<\/code> \u4f1a\u628a <code>text<\/code> \u81ea\u5df1\u7684\u5185\u5bb9\u53d8\u5927\u5199\u3002<strong>\u6ce8\u610f<\/strong>\uff1a\u5b57\u7b26\u4e32\u662f<strong>\u4e0d\u53ef\u53d8<\/strong>\uff08immutable\uff09\u7684\u2014\u2014<code>text.upper()<\/code> \u4e0d\u4f1a\u6539\u6389 text \u672c\u8eab\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u300c\u65b0\u7684\u3001\u53d8\u5927\u5199\u540e\u7684\u5b57\u7b26\u4e32\u300d\u3002\u60f3\u4fdd\u5b58\u7ed3\u679c\uff0c\u5fc5\u987b\u7528\u53d8\u91cf\u63a5\u4f4f\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u672f\u8bed\u5c0f\u8bcd\u5178\uff1a<strong>\u4e0d\u53ef\u53d8<\/strong>\uff08immutable\uff09\u5c31\u662f\u300c\u6539\u4e0d\u4e86\u300d\uff1a\u5b57\u7b26\u4e32\u4e00\u65e6\u521b\u5efa\uff0c\u5185\u5bb9\u5c31\u56fa\u5b9a\u4e86\uff0c\u6240\u6709\u64cd\u4f5c\u90fd\u662f\u300c\u9020\u4e00\u4e2a\u65b0\u7684\u300d\uff0c\u539f\u6765\u7684\u539f\u5c01\u4e0d\u52a8\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u751f\u6d3b\u7c7b\u6bd4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u7b26\u4e32\u65b9\u6cd5\u50cf<strong>\u624b\u673a\u76f8\u518c\u7684\u4e00\u952e\u7f8e\u5316<\/strong>\uff1a<code>strip()<\/code> \u662f\u88c1\u526a\u8fb9\u7f18\uff08\u53bb\u6389\u7a7a\u683c\uff09\uff0c<code>upper()<\/code>\/<code>lower()<\/code> \u662f\u6ee4\u955c\uff08\u6539\u5927\u5c0f\u5199\uff09\uff0c<code>replace()<\/code> \u662f\u6362\u8138\uff08\u628a A \u6362\u6210 B\uff09\uff0c<code>split()<\/code> \u662f\u628a\u4e00\u5f20\u5168\u5bb6\u798f\u6309\u4eba\u88c1\u526a\u6210\u591a\u5f20\u5355\u4eba\u7167\uff0c<code>join()<\/code> \u662f\u628a\u591a\u5f20\u7167\u7247\u5408\u6210\u4e00\u5f20\u62fc\u56fe\u3002\u6bcf\u70b9\u4e00\u6b21\u300c\u7f8e\u5316\u300d\u90fd\u4e0d\u4f1a\u6bc1\u6389\u539f\u56fe\uff08\u5b57\u7b26\u4e32\u4e0d\u53ef\u53d8\uff09\uff0c\u800c\u662f\u751f\u6210\u4e00\u5f20\u65b0\u56fe\uff08\u65b0\u5b57\u7b26\u4e32\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u4e8b\u9879\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 <strong>\u5e38\u7528\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>text = \"  Hello, Python  \"\nprint(text.strip())              # \u53bb\u6389\u4e24\u7aef\u7a7a\u683c\nprint(text.upper())              # \u5168\u90e8\u5927\u5199\nprint(text.lower())              # \u5168\u90e8\u5c0f\u5199\nprint(text.replace(\"Python\", \"\u4e16\u754c\"))  # \u66ff\u6362\nprint(len(text))                 # \u5b57\u7b26\u4e32\u957f\u5ea6\uff08\u542b\u4e24\u7aef\u7a7a\u683c\uff09\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Hello, Python\n  HELLO, PYTHON  \n  hello, python  \n  Hello, \u4e16\u754c  \n17\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>strip()<\/code> \u53ea\u53bb\u6389<strong>\u4e24\u7aef<\/strong>\u7a7a\u683c\uff0c\u4e2d\u95f4\u7684\u4fdd\u7559\uff1b<code>len()<\/code> \u6570\u7684\u662f\u5b57\u7b26\u4e2a\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 <strong>split \u62c6\u5206\uff0cjoin \u62fc\u63a5<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sentence = \"\u82f9\u679c,\u9999\u8549,\u897f\u74dc\"\nfruits = sentence.split(\",\")      # \u6309\u9017\u53f7\u62c6\u6210\u5217\u8868\nprint(fruits)                     # &#91;'\u82f9\u679c', '\u9999\u8549', '\u897f\u74dc']\n\nnames = &#91;\"\u5c0f\u660e\", \"\u5c0f\u7ea2\", \"\u5c0f\u521a\"]\nprint(\"\u3001\".join(names))           # \u7528\u987f\u53f7\u628a\u5217\u8868\u62fc\u6210\u5b57\u7b26\u4e32\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;'\u82f9\u679c', '\u9999\u8549', '\u897f\u74dc']\n\u5c0f\u660e\u3001\u5c0f\u7ea2\u3001\u5c0f\u521a\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>split(\",\")<\/code> \u4ee5\u9017\u53f7\u4e3a\u300c\u5207\u70b9\u300d\u628a\u5b57\u7b26\u4e32\u5207\u5f00\uff0c\u8fd4\u56de\u4e00\u4e2a<strong>\u5217\u8868<\/strong>\uff08list\uff0c\u65b9\u62ec\u53f7\u5305\u7740\u7684\u591a\u4e2a\u5143\u7d20\uff0cDay 5 \u8be6\u7ec6\u5b66\uff09\uff1b<code>\"\u3001\".join(names)<\/code> \u53cd\u8fc7\u6765\u628a\u5217\u8868\u5143\u7d20\u8fde\u63a5\u6210\u4e00\u53e5\u8bdd\u3002<strong>split \u662f\u300c\u5207\u300d\uff0cjoin \u662f\u300c\u7c98\u300d<\/strong>\uff0c\u65b9\u5411\u76f8\u53cd\uff0c\u662f\u4e00\u5bf9\u955c\u50cf\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3 <strong>\u5224\u65ad\u5b57\u7b26\u4e32\u5185\u5bb9\uff08\u8fd4\u56de\u5e03\u5c14\uff09<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>phone = \"13800138000\"\nprint(phone.isdigit())    # True\uff1a\u5168\u662f\u6570\u5b57\nprint(\"abc\".isalpha())    # True\uff1a\u5168\u662f\u5b57\u6bcd\nprint(\"a1\".isalnum())     # True\uff1a\u5b57\u6bcd\u6216\u6570\u5b57\nprint(\" \".isspace())      # True\uff1a\u5168\u662f\u7a7a\u767d\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u300cis \u5f00\u5934\u300d\u7684\u65b9\u6cd5\u57fa\u672c\u90fd\u662f\u300c\u63d0\u95ee\u300d\uff0c\u8fd4\u56de True\/False<\/strong>\uff0c\u8fd9\u4e2a\u89c4\u5f8b\u80fd\u5e2e\u4f60\u731c\u51fa\u5f88\u591a\u65b9\u6cd5\u7684\u610f\u601d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6613\u9519\u70b9<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>text.strip()<\/code> \u4e4b\u540e\u76f4\u63a5\u6253\u5370 <code>text<\/code> \u2192 \u95ee\u9898\uff1a\u5b57\u7b26\u4e32\u4e0d\u53ef\u53d8\uff0c\u539f\u53d8\u91cf\u6ca1\u53d8\uff0c\u8f93\u51fa\u8fd8\u662f\u5e26\u7a7a\u683c\u7684 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<code>text = text.strip()<\/code> \u7528\u53d8\u91cf\u63a5\u4f4f\u8fd4\u56de\u503c\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(text.upper)<\/code>\uff08\u5fd8\u5199\u62ec\u53f7\uff09 \u2192 \u95ee\u9898\uff1a\u6ca1\u6709\u62ec\u53f7\u53ea\u662f\u300c\u63d0\u5230\u65b9\u6cd5\u540d\u300d\uff0c\u4e0d\u6267\u884c\uff0c\u8f93\u51fa\u4e00\u4e32\u770b\u4e0d\u61c2\u7684\u5185\u5b58\u5730\u5740 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<code>text.upper()<\/code> \u5fc5\u987b\u5e26\u62ec\u53f7\u624d\u662f\u8c03\u7528\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>\"ABC\".strip()<\/code> \u4ee5\u4e3a\u80fd\u53bb\u6389\u6570\u5b57\u6216\u5b57\u6bcd \u2192 \u95ee\u9898\uff1a<code>strip()<\/code> \u53ea\u53bb\u7a7a\u767d\uff08\u7a7a\u683c\/\u6362\u884c\/\u5236\u8868\u7b26\uff09 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u53bb\u7279\u5b9a\u5b57\u7b26\u7528 <code>replace()<\/code>\uff0c\u5982 <code>\"A_B\".replace(\"_\", \"\")<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>split<\/code> \u548c <code>join<\/code> \u7684\u65b9\u5411\u641e\u53cd \u2192 \u95ee\u9898\uff1a<code>\"a,b\".join(...)<\/code>\u3001<code>\"...\".split(\",\")<\/code> \u7528\u9519\u4f4d\u7f6e \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<strong>split \u662f\u5b57\u7b26\u4e32\u8c03\u7528\uff08\u5207\u81ea\u5df1\uff09\uff0cjoin \u662f\u5206\u9694\u7b26\u8c03\u7528\uff08\u7c98\u522b\u4eba\uff09<\/strong>\uff1a<code>\",\".join(\u5217\u8868)<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bb0\u5fc6\u53e3\u8bc0<\/strong>\uff1a\u5b57\u7b26\u4e32\u4e0d\u53ef\u53d8\uff0c\u64cd\u4f5c\u5168\u9760\u8fd4\u56de\u503c\u63a5\u4f4f\uff1bsplit \u5207\u3001join \u7c98\uff0cis \u5f00\u5934\u662f\u63d0\u95ee\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4 f-string \u2014\u2014 \u4f18\u96c5\u7684\u683c\u5f0f\u5316\u8f93\u51fa<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u5b66\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>f-string<\/strong>\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff09\u662f\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e00\u4e2a <code>f<\/code>\uff0c\u7136\u540e\u7528 <code>{\u53d8\u91cf}<\/code> \u628a\u53d8\u91cf\u6216\u8868\u8fbe\u5f0f\u76f4\u63a5\u5d4c\u8fdb\u5b57\u7b26\u4e32\u91cc\uff1a<code>f\"\u6211\u53eb{name}\uff0c\u4eca\u5e74{age}\u5c81\"<\/code>\u3002\u4e3a\u4ec0\u4e48\u5fc5\u5b66\uff1f\u56e0\u4e3a\u5b83\u662f Python \u76ee\u524d<strong>\u6700\u63a8\u8350\u3001\u6700\u76f4\u89c2<\/strong>\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u2014\u2014\u4e0d\u7528\u518d\u5199 <code>\"\u6211\u53eb\" + name + \"\u4eca\u5e74\" + str(age)<\/code> \u8fd9\u79cd\u53c8\u957f\u53c8\u5bb9\u6613\u6f0f\u5f15\u53f7\u7684\u62fc\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e95\u5c42\u539f\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>f<\/code> \u662f format\uff08\u683c\u5f0f\u5316\uff09\u7684\u610f\u601d\u3002Python \u770b\u5230\u4ee5 <code>f<\/code> \u5f00\u5934\u7684\u5b57\u7b26\u4e32\uff0c\u4f1a\u626b\u63cf\u91cc\u9762\u6240\u6709 <code>{...}<\/code> \u82b1\u62ec\u53f7\uff1a\u628a\u62ec\u53f7\u91cc\u7684\u5185\u5bb9<strong>\u5f53\u6210\u4ee3\u7801\u53bb\u6c42\u503c<\/strong>\uff08\u53d8\u91cf\u5c31\u53d6\u5b83\u7684\u503c\uff0c\u8868\u8fbe\u5f0f\u5c31\u7b97\u51fa\u7ed3\u679c\uff09\uff0c\u518d\u628a\u6c42\u503c\u7ed3\u679c\u8f6c\u6210\u5b57\u7b26\u4e32\u586b\u56de\u539f\u4f4d\u7f6e\u3002\u6240\u4ee5 <code>{age + 1}<\/code> \u4f1a\u5148\u7b97 18 + 1 \u518d\u663e\u793a 19\u3002<code>{price:.2f}<\/code> \u91cc\u7684 <code>:.2f<\/code> \u662f\u683c\u5f0f\u8bf4\u660e\u2014\u2014<code>2f<\/code> \u8868\u793a\u300c\u4fdd\u7559 2 \u4f4d\u5c0f\u6570\u7684\u6d6e\u70b9\u6570\u300d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u751f\u6d3b\u7c7b\u6bd4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">f-string \u50cf<strong>\u586b\u7a7a\u9898\u6a21\u677f<\/strong>\uff1a\u8bd5\u5377\u4e0a\u5370\u7740\u300c\u6211\u53eb____\uff0c\u4eca\u5e74____\u5c81\u300d\uff0c\u4f60\u5f80\u7a7a\u91cc\u586b\u7b54\u6848\uff08\u53d8\u91cf\u503c\uff09\uff0c\u586b\u5b8c\u5c31\u662f\u5b8c\u6574\u53e5\u5b50\u3002<code>:2f<\/code> \u8fd9\u79cd\u683c\u5f0f\u8bf4\u660e\u5c31\u50cf\u300c\u7b54\u6848\u8bf7\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u300d\u7684\u7b54\u9898\u8981\u6c42\u2014\u2014\u6a21\u677f\u89c4\u5219\u5199\u6e05\u695a\uff0c\u586b\u51fa\u6765\u7684\u7ed3\u679c\u5c31\u6574\u9f50\u89c4\u8303\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u4e8b\u9879\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 <strong>\u628a\u53d8\u91cf\u5d4c\u8fdb\u5b57\u7b26\u4e32<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>name = \"\u5c0f\u660e\"\nage = 18\nprint(f\"\u6211\u53eb{name}\uff0c\u4eca\u5e74{age}\u5c81\")    # \u82b1\u62ec\u53f7\u91cc\u653e\u53d8\u91cf\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u6211\u53eb\u5c0f\u660e\uff0c\u4eca\u5e7418\u5c81\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>f \u548c\u5f15\u53f7\u4e4b\u95f4\u4e0d\u80fd\u6709\u7a7a\u683c<\/strong>\uff08<code>f \"...\"<\/code> \u4f1a\u62a5\u9519\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2 <strong>\u82b1\u62ec\u53f7\u91cc\u53ef\u4ee5\u653e\u8868\u8fbe\u5f0f<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>age = 18\nprint(f\"\u660e\u5e74\u6211\u5c31{age + 1}\u5c81\u4e86\")      # \u5148\u7b97 18+1 \u518d\u586b\u5165\nprice = 3.14159\nprint(f\"\u4ef7\u683c\u662f{price:.2f}\u5143\")        # \u4fdd\u7559 2 \u4f4d\u5c0f\u6570\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u660e\u5e74\u6211\u5c3119\u5c81\u4e86\n\u4ef7\u683c\u662f3.14\u5143\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>{price:.2f}<\/code> \u628a 3.14159 \u6309\u300c\u4fdd\u7559 2 \u4f4d\u5c0f\u6570\u300d\u683c\u5f0f\u5316\u2014\u2014\u6ce8\u610f\u662f<strong>\u56db\u820d\u4e94\u5165<\/strong>\u5230 3.14\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3 <strong>\u82b1\u62ec\u53f7\u91cc\u4e5f\u80fd\u653e\u5b57\u7b26\u4e32\u548c\u8868\u8fbe\u5f0f<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(f\"\u4ed6\u559c\u6b22{'Python'}\u548c{'\u7bee\u7403'}\")    # \u5b57\u7b26\u4e32\u5b57\u9762\u91cf\u4e5f\u80fd\u586b\nprint(f\"3 \u4e58\u4ee5 4 \u7b49\u4e8e {3 * 4}\")          # \u8868\u8fbe\u5f0f\u76f4\u63a5\u7b97\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4ed6\u559c\u6b22Python\u548c\u7bee\u7403\n3 \u4e58\u4ee5 4 \u7b49\u4e8e 12\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u82b1\u62ec\u53f7\u91cc\u53ef\u4ee5\u662f\u4efb\u4f55\u300c\u80fd\u7b97\u51fa\u503c\u7684\u4ee3\u7801\u300d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6613\u9519\u70b9<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(f\"\u6211\u53eb{name}\")<\/code> \u4f46\u5b57\u7b26\u4e32\u524d\u5fd8\u8bb0\u5199 f \u2192 \u95ee\u9898\uff1a<code>{name}<\/code> \u4f1a\u88ab\u539f\u6837\u6253\u5370\u51fa\u6765\uff0c\u4e0d\u4f1a\u66ff\u6362 \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u5b57\u7b26\u4e32\u6700\u524d\u9762\u52a0 <code>f<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(f\"{price:.2f}\")<\/code> \u4f46 price \u662f\u5b57\u7b26\u4e32 \u2192 \u95ee\u9898\uff1a<code>str<\/code> \u4e0d\u652f\u6301 <code>:2f<\/code> \u683c\u5f0f\uff0c\u62a5 <code>ValueError<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u786e\u4fdd\u662f\u6570\u5b57\u7c7b\u578b\uff0c\u6216\u5148\u7528 <code>float(price)<\/code> \u8f6c\u6362\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a\u82b1\u62ec\u53f7\u91cc\u76f4\u63a5\u653e\u4e2d\u6587\uff1a<code>f\"{\u540d\u5b57}\"<\/code> \u2192 \u95ee\u9898\uff1a<code>\u540d\u5b57<\/code> \u662f\u53d8\u91cf\u540d\uff0c\u6ca1\u5b9a\u4e49\u5c31\u62a5 <code>NameError<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a\u53d8\u91cf\u540d\u7528\u82f1\u6587\uff0c\u5982 <code>f\"{name}\"<\/code>\u3002<\/li>\n\n\n\n<li>\u9519\u8bef\u5199\u6cd5\uff1a<code>print(f\"\u7b54\u6848\u662f{10\/3}\")<\/code> \u60f3\u53ea\u7559 2 \u4f4d\u5c0f\u6570 \u2192 \u95ee\u9898\uff1a\u9ed8\u8ba4\u4f1a\u8f93\u51fa\u8d85\u957f\u5c0f\u6570 <code>3.3333333333333335<\/code> \u2192 \u6b63\u786e\u5199\u6cd5\uff1a<code>f\"{10\/3:.2f}\"<\/code> \u8f93\u51fa <code>3.33<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bb0\u5fc6\u53e3\u8bc0<\/strong>\uff1a\u5b57\u7b26\u4e32\u524d\u52a0\u4e2a f\uff0c\u82b1\u62ec\u53f7\u91cc\u653e\u53d8\u91cf\uff1b\u5192\u53f7\u70b9\u4e8c f \u662f\u4e24\u4f4d\u5c0f\u6570\uff0c\u56db\u820d\u4e94\u5165\u521a\u521a\u597d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5 \u52a8\u624b\u5b9e\u8df5\uff1a\u5b57\u7b26\u4e32\u5904\u7406\u5c0f\u5de5\u5177<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5199\u4e00\u4e2a\u7a0b\u5e8f\uff1a\u8f93\u5165\u4e00\u53e5\u8bdd\uff0c\u53bb\u6389\u9996\u5c3e\u7a7a\u683c\u3001\u7edf\u8ba1\u5b57\u6570\u3001\u628a\u6307\u5b9a\u8bcd\u66ff\u6362\u6389\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># string_tool.py \u2014\u2014 \u5b57\u7b26\u4e32\u5904\u7406\u5c0f\u5de5\u5177\ntext = input(\"\u8bf7\u8f93\u5165\u4e00\u53e5\u8bdd\uff1a\").strip()      # \u987a\u4fbf\u53bb\u6389\u9996\u5c3e\u7a7a\u683c\n\nwords = text.split()                        # \u6309\u7a7a\u683c\u62c6\u6210\u5355\u8bcd\u5217\u8868\nprint(f\"\u4f60\u8f93\u5165\u4e86 {len(words)} \u4e2a\u8bcd\uff0c\u5171 {len(text)} \u4e2a\u5b57\u7b26\")\n\nword = input(\"\u60f3\u66ff\u6362\u54ea\u4e2a\u8bcd\uff1f\").strip()\nnew_word = input(\"\u66ff\u6362\u6210\u4ec0\u4e48\uff1f\").strip()\nprint(\"\u66ff\u6362\u7ed3\u679c\uff1a\", text.replace(word, new_word))\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u793a\u4f8b\uff08\u4ea4\u4e92\uff1a\u4f9d\u6b21\u8f93\u5165\u540e\u56de\u8f66\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8bf7\u8f93\u5165\u4e00\u53e5\u8bdd\uff1a  \u6211\u559c\u6b22 Python \u7f16\u7a0b\n\u4f60\u8f93\u5165\u4e86 3 \u4e2a\u8bcd\uff0c\u5171 13 \u4e2a\u5b57\u7b26\n\u60f3\u66ff\u6362\u54ea\u4e2a\u8bcd\uff1fPython\n\u66ff\u6362\u6210\u4ec0\u4e48\uff1fC++\n\u66ff\u6362\u7ed3\u679c\uff1a \u6211\u559c\u6b22 C++ \u7f16\u7a0b\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u60f3\u4e00\u60f3<\/strong>\uff1a<code>input()<\/code> \u540e\u9762\u76f4\u63a5\u94fe\u5f0f\u8c03\u7528 <code>.strip()<\/code>\u2014\u2014\u56e0\u4e3a <code>input()<\/code> \u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u5c31\u80fd\u8c03\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\uff0c\u4e00\u6b65\u5230\u4f4d\u53bb\u6389\u9996\u5c3e\u7a7a\u683c\uff0c\u8fd9\u5c31\u662f Day 3 \u77e5\u8bc6\u70b9\u7684\u7efc\u5408\u8fd0\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4eca\u65e5\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b97\u672f\u8fd0\u7b97\u7b26\uff1a<code>+ - * \/ \/\/ % **<\/code>\uff1b\u9664\u6cd5\u603b\u51fa\u5c0f\u6570\u3001\u6574\u9664\u5411\u4e0b\u53d6\u6574\u3001<code>%<\/code> \u5224\u65ad\u5947\u5076\n\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff1a\u5148\u4e58\u65b9\u3001\u518d\u4e58\u9664\u3001\u540e\u52a0\u51cf\uff0c\u62ff\u4e0d\u51c6\u5c31\u52a0\u62ec\u53f7\n\u6bd4\u8f83\u8fd0\u7b97\u7b26\u7ed3\u679c\u662f True \/ False\uff1b<code>==<\/code> \u662f\u5224\u65ad\u3001<code>=<\/code> \u662f\u8d4b\u503c\n<code>and<\/code>\uff08\u90fd\u6ee1\u8db3\uff09\/ <code>or<\/code>\uff08\u6ee1\u8db3\u4e00\u4e2a\uff09\/ <code>not<\/code>\uff08\u53d6\u53cd\uff09\u7ec4\u5408\u6761\u4ef6\n\u5b57\u7b26\u4e32\u65b9\u6cd5\uff1a<code>strip<\/code> \/ <code>upper<\/code> \/ <code>lower<\/code> \/ <code>replace<\/code> \/ <code>len<\/code> \/ <code>split<\/code> \/ <code>join<\/code> \/ <code>isdigit<\/code> \u968f\u624b\u4f1a\u7528\n\u5b57\u7b26\u4e32\u4e0d\u53ef\u53d8\uff0c\u65b9\u6cd5\u8fd4\u56de\u503c\u8981\u7528\u53d8\u91cf\u63a5\u4f4f\nf-string \u683c\u5f0f\u5316\uff1a<code>f\"{\u53d8\u91cf}\"<\/code>\u3001<code>f\"{\u8868\u8fbe\u5f0f}\"<\/code>\u3001<code>f\"{\u6570\u503c:.2f}\"<\/code>\uff08\u56db\u820d\u4e94\u5165\uff09\n\u5b8c\u6210\u300c\u5b57\u7b26\u4e32\u5904\u7406\u5c0f\u5de5\u5177\u300d\u5e76\u8fd0\u884c\u6210\u529f<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u62a5\u9519<\/th><th>\u539f\u56e0<\/th><th>\u4fee\u590d<\/th><\/tr><\/thead><tbody><tr><td><code>SyntaxError: invalid syntax<\/code><\/td><td><code>=<\/code> \u548c <code>==<\/code> \u6df7\u7528\uff0c\u6216\u62ec\u53f7\u4e0d\u914d\u5bf9<\/td><td>\u5224\u65ad\u7528 <code>==<\/code>\uff0c\u8d4b\u503c\u7528 <code>=<\/code><\/td><\/tr><tr><td><code>AttributeError: 'str' object has no attribute 'Strip'<\/code><\/td><td>\u65b9\u6cd5\u540d\u5927\u5c0f\u5199\u5199\u9519\uff08Python \u533a\u5206\u5927\u5c0f\u5199\uff09<\/td><td>\u65b9\u6cd5\u90fd\u662f\u5c0f\u5199\uff1a<code>strip()<\/code><\/td><\/tr><tr><td><code>TypeError: unsupported operand type(s)<\/code><\/td><td>\u5b57\u7b26\u4e32\u548c\u6570\u5b57\u6df7\u7528\u8fd0\u7b97\u7b26<\/td><td>\u5148\u8f6c\u6362\u7c7b\u578b\u6216\u7528 f-string<\/td><\/tr><tr><td><code>ZeroDivisionError<\/code><\/td><td>\u9664\u6570\u4e3a 0<\/td><td>\u9664\u4e4b\u524d\u5148\u5224\u65ad\u9664\u6570\u4e0d\u4e3a 0<\/td><\/tr><tr><td>\u7ed3\u679c\u83ab\u540d\u662f False<\/td><td><code>and<\/code> \/ <code>or<\/code> \u4f18\u5148\u7ea7\u6ca1\u641e\u6e05<\/td><td>\u62ff\u4e0d\u51c6\u5c31\u52a0\u62ec\u53f7\uff1a<code>(a &gt; 5) and (b &lt; 10)<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>1 \u7b97\u672f\u8fd0\u7b97\u7b26 \u2014\u2014 \u8ba9\u7a0b\u5e8f\u4f1a\u7b97\u6570 \u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u5b66\uff1f \u7b97\u672f\u8fd0\u7b97\u7b26\u5c31\u662f\u6570\u5b66\u91cc\u7684\u52a0\u51cf\u4e58\u9664\u5728 Python \u91cc\u7684\u5199 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[16,9],"tags":[],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-python","category-code-dev"],"_links":{"self":[{"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/comments?post=62"}],"version-history":[{"count":2,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":132,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/posts\/62\/revisions\/132"}],"wp:attachment":[{"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/media?parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/categories?post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ltrainyard.icu\/index.php\/wp-json\/wp\/v2\/tags?post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}