{"id":135,"date":"2023-10-11T12:26:50","date_gmt":"2023-10-11T04:26:50","guid":{"rendered":"http:\/\/ai.gitpp.com\/?p=135"},"modified":"2023-10-11T12:58:36","modified_gmt":"2023-10-11T04:58:36","slug":"%e5%ae%8c%e7%be%8epython%e5%85%a5%e9%97%a8%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e7%82%b9%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"http:\/\/ai.gitpp.com\/index.php\/2023\/10\/11\/%e5%ae%8c%e7%be%8epython%e5%85%a5%e9%97%a8%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e7%82%b9%e6%80%bb%e7%bb%93\/","title":{"rendered":"\u5b8c\u7f8ePython\u5165\u95e8\u57fa\u7840\u77e5\u8bc6\u70b9\u603b\u7ed3"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Python\u6709\u4e94\u4e2a\u6807\u51c6\u7684\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Numbers\uff08\u6570\u5b57\uff09<\/li>\n\n\n\n<li>String\uff08\u5b57\u7b26\u4e32\uff09<\/li>\n\n\n\n<li>List\uff08\u5217\u8868\uff09<\/li>\n\n\n\n<li>Tuple\uff08\u5143\u7ec4\uff09<\/li>\n\n\n\n<li>Dictionary\uff08\u5b57\u5178\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u4e07\u4e08\u9ad8\u697c\u5e73\u5730\u8d77\uff0c\u8fd9\u4e94\u4e2a\u6807\u51c6\u7684\u6570\u636e\u7c7b\u578b\u8bb2\u8d2f\u7a7f\u4e8e\u6574\u4e2aPython<\/p>\n\n\n\n<p><strong>Python\u652f\u6301\u56db\u79cd\u4e0d\u540c\u7684\u6570\u5b57\u7c7b\u578b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>int\uff08\u6709\u7b26\u53f7\u6574\u578b\uff09<\/li>\n\n\n\n<li>long\uff08\u957f\u6574\u578b[\u4e5f\u53ef\u4ee5\u4ee3\u8868\u516b\u8fdb\u5236\u548c\u5341\u516d\u8fdb\u5236]\uff09<\/li>\n\n\n\n<li>float\uff08\u6d6e\u70b9\u578b\uff09<\/li>\n\n\n\n<li>complex\uff08\u590d\u6570)<\/li>\n<\/ul>\n\n\n\n<p><strong>python\u7684\u5b57\u4e32\u5217\u8868\u67092\u79cd\u53d6\u503c\u987a\u5e8f:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ece\u5de6\u5230\u53f3\u7d22\u5f15\u9ed8\u8ba40\u5f00\u59cb\u7684\uff0c\u6700\u5927\u8303\u56f4\u662f\u5b57\u7b26\u4e32\u957f\u5ea6\u5c111<\/li>\n\n\n\n<li>\u4ece\u53f3\u5230\u5de6\u7d22\u5f15\u9ed8\u8ba4-1\u5f00\u59cb\u7684\uff0c\u6700\u5927\u8303\u56f4\u662f\u5b57\u7b26\u4e32\u5f00\u5934<\/li>\n<\/ul>\n\n\n\n<p><strong>List\uff08\u5217\u8868\uff09 \u662f Python \u4e2d\u4f7f\u7528\u6700\u9891\u7e41\u7684\u6570\u636e\u7c7b\u578b\u3002<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5217\u8868\u53ef\u4ee5\u5b8c\u6210\u5927\u591a\u6570\u96c6\u5408\u7c7b\u7684\u6570\u636e\u7ed3\u6784\u5b9e\u73b0\u3002\u5b83\u652f\u6301\u5b57\u7b26\uff0c\u6570\u5b57\uff0c\u5b57\u7b26\u4e32\u751a\u81f3\u53ef\u4ee5\u5305\u542b\u5217\u8868\uff08\u5373\u5d4c\u5957\uff09\u3002<\/li>\n\n\n\n<li>\u5217\u8868\u7528 [ ] \u6807\u8bc6\uff0c\u662f python \u6700\u901a\u7528\u7684\u590d\u5408\u6570\u636e\u7c7b\u578b\u3002<\/li>\n\n\n\n<li>\u5217\u8868\u4e2d\u503c\u7684\u5207\u5272\u4e5f\u53ef\u4ee5\u7528\u5230\u53d8\u91cf [\u5934\u4e0b\u6807:\u5c3e\u4e0b\u6807] \uff0c\u5c31\u53ef\u4ee5\u622a\u53d6\u76f8\u5e94\u7684\u5217\u8868\uff0c\u4ece\u5de6\u5230\u53f3\u7d22\u5f15\u9ed8\u8ba4 0 \u5f00\u59cb\uff0c\u4ece\u53f3\u5230\u5de6\u7d22\u5f15\u9ed8\u8ba4 -1 \u5f00\u59cb\uff0c\u4e0b\u6807\u53ef\u4ee5\u4e3a\u7a7a\u8868\u793a\u53d6\u5230\u5934\u6216\u5c3e\u3002<\/li>\n\n\n\n<li>\u52a0\u53f7 + \u662f\u5217\u8868\u8fde\u63a5\u8fd0\u7b97\u7b26\uff0c\u661f\u53f7 * \u662f\u91cd\u590d\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u5143\u7ec4\u662f\u53e6\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\uff0c\u7c7b\u4f3c\u4e8eList\uff08\u5217\u8868\uff09\u3002<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5143\u7ec4\u7528&#8221;()&#8221;\u6807\u8bc6\u3002\u5185\u90e8\u5143\u7d20\u7528\u9017\u53f7\u9694\u5f00\u3002\u4f46\u662f\u5143\u7ec4\u4e0d\u80fd\u4e8c\u6b21\u8d4b\u503c\uff0c\u76f8\u5f53\u4e8e\u53ea\u8bfb\u5217\u8868\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u5b57\u5178(dictionary)\u662f\u9664\u5217\u8868\u4ee5\u5916python\u4e4b\u4e2d\u6700\u7075\u6d3b\u7684\u5185\u7f6e\u6570\u636e\u7ed3\u6784\u7c7b\u578b\u3002<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5217\u8868\u662f\u6709\u5e8f\u7684\u5bf9\u8c61\u7ed3\u5408\uff0c\u5b57\u5178\u662f\u65e0\u5e8f\u7684\u5bf9\u8c61\u96c6\u5408\u3002\u4e24\u8005\u4e4b\u95f4\u7684\u533a\u522b\u5728\u4e8e\uff1a\u5b57\u5178\u5f53\u4e2d\u7684\u5143\u7d20\u662f\u901a\u8fc7\u952e\u6765\u5b58\u53d6\u7684\uff0c\u800c\u4e0d\u662f\u901a\u8fc7\u504f\u79fb\u5b58\u53d6\u3002<\/li>\n\n\n\n<li>\u5b57\u5178\u7528&#8221;{ }&#8221;\u6807\u8bc6\u3002\u5b57\u5178\u7531\u7d22\u5f15(key)\u548c\u5b83\u5bf9\u5e94\u7684\u503cvalue\u7ec4\u6210\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Python \u662f\u4e00\u79cd\u89e3\u91ca\u578b\u3001\u9762\u5411\u5bf9\u8c61\u3001\u52a8\u6001\u6570\u636e\u7c7b\u578b\u7684\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\u3002Python\u57fa\u7840\u77e5\u8bc6\u5305\u542bPython\u6570\u636e\u7c7b\u578b\uff0c\u6570\u636e\u7ed3\u6784\uff0c\u63a7\u5236\u6d41\u7b49\uff0c\u4e0e\u5176\u4ed6\u9ad8\u7ea7\u8bed\u8a00\u7c7b\u4f3c\uff0c\u987a\u5e8f\u8bed\u53e5\u3001\u6761\u4ef6\u8bed\u53e5\u3001\u5faa\u73af\u8bed\u53e5\u7b49\u662f\u5176\u57fa\u672c\u7ed3\u6784\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1\uff0ePython\u57fa\u672c\u547d\u4ee4<\/h2>\n\n\n\n<p><strong>1.1&nbsp; \u5217\u51fa\u5df2\u5b89\u88c5\u7684\u5305<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>pip list<\/code><\/pre>\n\n\n\n<p><strong>1.2&nbsp;&nbsp;\u67e5\u770b\u53ef\u5347\u7ea7\u7684\u5305<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>pip list -o<\/code><\/pre>\n\n\n\n<p><strong>1.3&nbsp;&nbsp;\u5b89\u88c5\u5305<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>pip install SomePackage # \u6700\u65b0\u7248\u672c<\/code><code>pip install SomePackage==1.5.0 # \u6307\u5b9a\u7248\u672c<\/code><\/p>\n\n\n\n<p><strong>1.4&nbsp;&nbsp;\u955c\u50cf\u7ad9\u5b89\u88c5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install -i https:\/\/pypi.tuna.tsinghua.edu.cn\/simple some-package<\/code><\/pre>\n\n\n\n<p><strong>1.5&nbsp;&nbsp;\u5347\u7ea7\u5305<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>pip install --upgrade SomePackage # \u5347\u7ea7\u81f3\u6700\u65b0\u7248\u672c<\/code><code>pip install --upgrade SomePackage==1.5.0 # \u5347\u7ea7\u4e3a\u6307\u5b9a\u7248\u672c<\/code><\/p>\n\n\n\n<p><strong>1.6&nbsp;&nbsp;\u5378\u8f7d\u5305<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>pip uninstall SomePackage<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u5bfc\u5165sys\u5e93\u53ea\u662f\u4e3a\u4e86\u786e\u8ba4\u4e00\u4e0bPython\u7684\u7248\u672c<\/code><\/p>\n\n\n\n<p><code>import sys    #\u5bfc\u5165pandas<\/code><\/p>\n\n\n\n<p><code>import pandas as pdimport numpyimport matplotlib<\/code><\/p>\n\n\n\n<p><code>print('Python \u7248\u672c\u4e3a\uff1a' + sys.version)<\/code><\/p>\n\n\n\n<p><code>print('Pandas \u7248\u672c\u4e3a\uff1a' + pd.__version__)<\/code><\/p>\n\n\n\n<p><code>print('Numpy \u7248\u672c\u4e3a\uff1a' + pd.__version__)<\/code><\/p>\n\n\n\n<p><code>print('Matplotlib \u7248\u672c\u4e3a\uff1a' + matplotlib.__version__)<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhrvyjKGB64OGcM88ODmIst1P3UuS8E8mDexTl91jGqse9djtztHX7Mibg\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2\uff0e\u53d8\u91cf\u4e0e\u4fdd\u7559\u5b57<\/h2>\n\n\n\n<p><strong>2.1&nbsp;&nbsp;\u53d8\u91cf<\/strong><\/p>\n\n\n\n<p>\u53d8\u91cf\u76f8\u5f53\u4e8e\u4e00\u4e2a\u5185\u5b58\u5bb9\u5668\uff0c\u53ef\u4ee5\u6307\u5b9a\u5b58\u5165\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u662f\u6574\u6570\uff0c\u5c0f\u6570\u6216\u5b57\u7b26\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#Jupyter notebook\u6253\u5370\u591a\u4e2a\u53d8\u91cf\u7ed3\u679c<\/code><\/p>\n\n\n\n<p><code>from IPython.core.interactiveshell import InteractiveShellInteractiveShell.ast_node_interactivity='all'<\/code><\/p>\n\n\n\n<p>\u4f7f\u7528\u5982\u4e0a\u7684\u4ee3\u7801\u53ef\u4ee5\u4f7f\u5f97\u53d8\u91cf\u7ed3\u679c\u591a\u884c\u663e\u793a\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>name = \"\u5927\u8bdd\u6570\u636e\u5206\u6790\" # \u5b57\u7b26\u4e32<\/code><\/p>\n\n\n\n<p><code>age = 18 # \u8d4b\u503c\u6574\u578b\u53d8\u91cf<\/code><\/p>\n\n\n\n<p><code>height = 178.4 # \u6d6e\u70b9\u578b<\/code><\/p>\n\n\n\n<p><code>name<\/code><\/p>\n\n\n\n<p><code>age<\/code><\/p>\n\n\n\n<p><code>height<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhrDzdR3o1Olc4cxkXSiamfkJP6C4YXbNvGtOGmls2n6qk8WOjJJ1V39TA\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<p><strong>2.2&nbsp;&nbsp;\u4fdd\u7559\u5b57<\/strong><\/p>\n\n\n\n<p>Python\u4e2d\u7684\u4fdd\u7559\u5b57\u4e0d\u80fd\u7528\u4f5c\u53d8\u91cf\u540d\u79f0\uff0c\u5e38\u89c1\u7684Python\u4fdd\u7559\u5b57\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>import keyword<\/code><\/p>\n\n\n\n<p><code>print(keyword.kwlist)<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>[&#8216;False&#8217;, &#8216;None&#8217;, &#8216;True&#8217;, &#8216;and&#8217;, &#8216;as&#8217;, &#8216;assert&#8217;, &#8216;async&#8217;, &#8216;await&#8217;, &#8216;break&#8217;, &#8216;class&#8217;, &#8216;continue&#8217;, &#8216;def&#8217;, &#8216;del&#8217;, &#8216;elif&#8217;, &#8216;else&#8217;, &#8216;except&#8217;, &#8216;finally&#8217;, &#8216;for&#8217;, &#8216;from&#8217;, &#8216;global&#8217;, &#8216;if&#8217;, &#8216;import&#8217;, &#8216;in&#8217;, &#8216;is&#8217;, &#8216;lambda&#8217;, &#8216;nonlocal&#8217;, &#8216;not&#8217;, &#8216;or&#8217;, &#8216;pass&#8217;, &#8216;raise&#8217;, &#8216;return&#8217;, &#8216;try&#8217;, &#8216;while&#8217;, &#8216;with&#8217;, &#8216;yield&#8217;]<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><\/h4>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u4e09\u5927\u6570\u636e\u7c7b\u578b<\/h2>\n\n\n\n<p><strong>3.1&nbsp;&nbsp;str<\/strong><\/p>\n\n\n\n<p><strong>3.1.1&nbsp;&nbsp;\u521d\u8bc6\u5b57\u7b26\u4e32<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5b57\u7b26\u4e32\u5b9a\u4e49<\/code><\/p>\n\n\n\n<p><code>a = 'hello world'<\/code><\/p>\n\n\n\n<p><code>a<\/code><\/p>\n\n\n\n<p>&#8216;hello world&#8217;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>type(a)<\/code> <code>#\u7c7b\u578b<\/code><\/p>\n\n\n\n<p><code>len(a) #\u957f\u5ea6<\/code><\/p>\n\n\n\n<p>str<\/p>\n\n\n\n<p>Out[82]:11<\/p>\n\n\n\n<p><strong>3.1.2&nbsp;&nbsp;\u7d22\u5f15\u548c\u5207\u7247<\/strong><\/p>\n\n\n\n<p>\u4f7f\u7528[\u5934\u4e0b\u6807:\u5c3e\u4e0b\u6807]\u6765\u5207\u7247\uff0c\u5176\u4e2d\u4e0b\u6807\u662f\u4ece 0 \u5f00\u59cb\u7b97\u8d77\uff0c\u5207\u7247\u7684\u8303\u56f4\u524d\u95ed\u540e\u5f00\uff0c\u8868\u793a\u65b9\u62ec\u53f7\u7684\u5de6\u8fb9\u53ef\u4ee5\u5207\u5207\u5230\uff0c\u800c\u53f3\u8fb9\u5207\u4e0d\u5230\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5207\u7247\u7d22\u5f15<\/code><\/p>\n\n\n\n<p><code>a[0:5],a[:5]<\/code><\/p>\n\n\n\n<p>(&#8216;hello&#8217;, &#8216;hello&#8217;)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>a&#91;:],a&#91;::1]<\/code><\/pre>\n\n\n\n<p>(&#8216;hello world&#8217;, &#8216;hello world&#8217;)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u8d1f\u53f7\u4ee3\u8868\u4ece\u53f3\u8fb9\u5f00\u59cb\u622a\u53d6\uff0c\u8fd9\u91cc\u8868\u793a\u53d6\u53cd<\/code><code>a[::-1]<\/code><\/p>\n\n\n\n<p>&#8216;dlrow olleh&#8217;<\/p>\n\n\n\n<p><strong>3.1.3&nbsp;&nbsp;\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>'-'.join(a)<\/code><\/p>\n\n\n\n<p><code>a.replace('world','boy')<\/code><\/p>\n\n\n\n<p><code>a.zfill(15)#\u8fd4\u56de\u6307\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u539f\u5b57\u7b26\u4e32\u53f3\u5bf9\u9f50\uff0c\u524d\u9762\u586b\u51450<br>today=['2015','10','15']<\/code><\/p>\n\n\n\n<p><code>print(\"-\".join(today))<\/code><\/p>\n\n\n\n<p>&#8216;h-e-l-l-o- -w-o-r-l-d&#8217;<\/p>\n\n\n\n<p>Out[6]:&#8217;hello boy&#8217;<\/p>\n\n\n\n<p>Out[6]:&#8217;0000hello world&#8217;<\/p>\n\n\n\n<p>2015-10-15<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>a.count('o') #\u5b57\u7b26\u4e32\u8ba1\u6570<\/code><\/p>\n\n\n\n<p><code>a.index('o') #\u5b57\u7b26\u4e32\u7d22\u5f15<\/code><\/p>\n\n\n\n<p><code>a.find('o') #\u5b57\u7b26\u4e32\u67e5\u627e<\/code><\/p>\n\n\n\n<p><code>a.capitalize()#\u9996\u5b57\u6bcd\u5927\u5199<\/code><\/p>\n\n\n\n<p><code>a.title() #\u8bbe\u7f6e\u4e3a\u6807\u9898<\/code><\/p>\n\n\n\n<p><code>a.upper() #\u5b57\u6bcd\u5927\u5199<\/code><\/p>\n\n\n\n<p><code>a.lower() #\u5b57\u6bcd\u5c0f\u5199<\/code><\/p>\n\n\n\n<p><code>a.startswith('h') #\u5f00\u5934\u5305\u542b\u7684\u5b57\u7b26<\/code><\/p>\n\n\n\n<p>2<\/p>\n\n\n\n<p>Out[70]:4<\/p>\n\n\n\n<p>Out[70]:4<\/p>\n\n\n\n<p>Out[70]:&#8217;Hello world&#8217;<\/p>\n\n\n\n<p>Out[70]:&#8217;Hello World&#8217;<\/p>\n\n\n\n<p>Out[70]:&#8217;HELLO WORLD&#8217;<\/p>\n\n\n\n<p>Out[70]:&#8217;hello world&#8217;<\/p>\n\n\n\n<p>Out[70]:True<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>s = '**2021\/12\/16**'<\/code><\/p>\n\n\n\n<p><code>s.strip('*')#\u53bb\u9664\u5934\u548c\u5c3e\u90e8\u5b57\u7b26<\/code><\/p>\n\n\n\n<p><code>s.lstrip('*')#\u53bb\u9664\u5de6\u8fb9\u5b57\u7b26<\/code><\/p>\n\n\n\n<p><code>s.rstrip('*')#\u53bb\u9664\u53f3\u8fb9\u5b57\u7b26<\/code><\/p>\n\n\n\n<p><code>s.strip('*').split('\/') #\u53bb\u9664\u5934\u548c\u5c3e\u90e8\u5b57\u7b26,\u5e76\u6309\u7167\/\u5206\u9694\u5f00<\/code><\/p>\n\n\n\n<p>&#8216;2021\/12\/16&#8217;<\/p>\n\n\n\n<p>&#8216;2021\/12\/16**&#8217;<\/p>\n\n\n\n<p>&#8216;**2021\/12\/16&#8217;<\/p>\n\n\n\n<p>[&#8216;2021&#8242;, &#8217;12&#8217;, &#8217;16&#8217;]<\/p>\n\n\n\n<p><strong>3.1.4&nbsp;&nbsp;\u5b57\u7b26\u8fd0\u7b97<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u8fd0\u7b97\u7b26\u8fd0\u7b97\uff1a+ \u548c *<\/code><\/p>\n\n\n\n<p><code>s = '\u5927\u8bdd\u6570\u636e\u5206\u6790'<\/code><\/p>\n\n\n\n<p><code>'Hello' + ' ' + s<\/code><\/p>\n\n\n\n<p><code>s * 3<\/code><\/p>\n\n\n\n<p>&#8216;Hello \u5927\u8bdd\u6570\u636e\u5206\u6790&#8217;<\/p>\n\n\n\n<p>&#8216;\u5927\u8bdd\u6570\u636e\u5206\u6790\u5927\u8bdd\u6570\u636e\u5206\u6790\u5927\u8bdd\u6570\u636e\u5206\u6790&#8217;<\/p>\n\n\n\n<p><strong>3.2&nbsp;&nbsp;int<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>num = 10<\/code><\/p>\n\n\n\n<p><code>print(type(num))#\u57fa\u672c\u7684\u7b97\u672f\u8fd0\u7b97<\/code><\/p>\n\n\n\n<p><code>print('\u52a0\u6cd5:',num + 2)<\/code><\/p>\n\n\n\n<p><code>print('\u51cf\u6cd5:',num - 2)<\/code><\/p>\n\n\n\n<p><code>print('\u4e58\u6cd5:',num * 2)<\/code><\/p>\n\n\n\n<p><code>print('\u9664\u6cd5',num \/ 2)<\/code><\/p>\n\n\n\n<p><code>print('\u5730\u677f\u9664\u6cd5',num \/\/ 2)<\/code><\/p>\n\n\n\n<p><code>print('\u5e42\u8fd0\u7b97',num ** 2)<\/code><\/p>\n\n\n\n<p><code>print('\u4f59\u6570',num % 2)<\/code><\/p>\n\n\n\n<p>\u52a0\u6cd5: 12<\/p>\n\n\n\n<p>\u51cf\u6cd5: 8<\/p>\n\n\n\n<p>\u4e58\u6cd5: 20<\/p>\n\n\n\n<p>\u9664\u6cd5 5.0<\/p>\n\n\n\n<p>\u5730\u677f\u9664\u6cd5 5<\/p>\n\n\n\n<p>\u5e42\u8fd0\u7b97 100<\/p>\n\n\n\n<p>\u4f59\u6570 0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u7b97\u672f\u8fd0\u7b97\u7684\u987a\u5e8f,\u5148\u8ba1\u7b97\u62ec\u53f7\u91cc\u8fb9\u7684\u5185\u5bb9,\u518d\u4e58\u9664\u540e\u52a0\u51cf<\/code><\/p>\n\n\n\n<p><code>print(num * (2 + 1))<\/code><\/p>\n\n\n\n<p>30<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u6570\u5b57\u81ea\u589e\u957f<\/code><\/p>\n\n\n\n<p><code>num = 10<\/code><\/p>\n\n\n\n<p><code>num = num + 1<\/code><\/p>\n\n\n\n<p><code>print(num)#\u6216\u8005+=\u65b9\u5f0f<\/code><\/p>\n\n\n\n<p><code>num = 10<\/code><\/p>\n\n\n\n<p><code>num += 1<\/code><\/p>\n\n\n\n<p><code>print(num)#\u6570\u5b57\u81ea\u4e58\u79ef<\/code><\/p>\n\n\n\n<p><code>num = 10<\/code><\/p>\n\n\n\n<p><code>num = num * 5<\/code><\/p>\n\n\n\n<p><code>print(num)<br>#\u4f7f\u7528*=<\/code><\/p>\n\n\n\n<p><code>num = 10<\/code><\/p>\n\n\n\n<p><code>num *= 5<\/code><\/p>\n\n\n\n<p><code>print(num)<\/code><\/p>\n\n\n\n<p>11<\/p>\n\n\n\n<p>11<\/p>\n\n\n\n<p>50<\/p>\n\n\n\n<p>50<\/p>\n\n\n\n<p><strong>3.3&nbsp;&nbsp;float<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>num = 10.01<\/code><\/p>\n\n\n\n<p><code>print(type(num))<\/code><\/p>\n\n\n\n<p>&lt;class &#8216;float&#8217;&gt;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u57fa\u672c\u7684\u7b97\u672f\u8fd0\u7b97<\/code><\/p>\n\n\n\n<p><code>print('\u52a0\u6cd5:',num + 2)<\/code><\/p>\n\n\n\n<p><code>print('\u51cf\u6cd5:',num - 2)<\/code><\/p>\n\n\n\n<p><code>print('\u4e58\u6cd5:',num * 2)<\/code><\/p>\n\n\n\n<p><code>print('\u9664\u6cd5',num \/ 2)<\/code><\/p>\n\n\n\n<p><code>print('\u5730\u677f\u9664\u6cd5',num \/\/ 2)<\/code><\/p>\n\n\n\n<p><code>print('\u5e42\u8fd0\u7b97',num ** 2)<\/code><\/p>\n\n\n\n<p><code>print('\u4f59\u6570',num % 2)<\/code><\/p>\n\n\n\n<p>\u52a0\u6cd5: 12.01<\/p>\n\n\n\n<p>\u51cf\u6cd5: 8.01<\/p>\n\n\n\n<p>\u4e58\u6cd5: 20.02<\/p>\n\n\n\n<p>\u9664\u6cd5 5.005<\/p>\n\n\n\n<p>\u5730\u677f\u9664\u6cd5 5.0<\/p>\n\n\n\n<p>\u5e42\u8fd0\u7b97 100.20009999999999<\/p>\n\n\n\n<p>\u4f59\u6570 0.009999999999999787<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u7b97\u672f\u8fd0\u7b97\u7684\u987a\u5e8f,\u5148\u8ba1\u7b97\u62ec\u53f7\u91cc\u8fb9\u7684\u5185\u5bb9,\u518d\u4e58\u9664\u540e\u52a0\u51cf<\/code><\/p>\n\n\n\n<p><code>print(num * (2 + 1))<\/code><\/p>\n\n\n\n<p>30.03<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u6570\u5b57\u81ea\u589e\u957f<\/code><\/p>\n\n\n\n<p><code>num = 10.0<\/code><\/p>\n\n\n\n<p><code>num = num + 1<\/code><\/p>\n\n\n\n<p><code>rint(num)<\/code><\/p>\n\n\n\n<p><code>#\u6216\u8005+=\u65b9\u5f0f<\/code><\/p>\n\n\n\n<p><code>num = 10.0<\/code><\/p>\n\n\n\n<p><code>num += 1<\/code><\/p>\n\n\n\n<p><code>print(num)<\/code><\/p>\n\n\n\n<p><code>#\u6570\u5b57\u81ea\u4e58\u79ef<\/code><\/p>\n\n\n\n<p><code>num = 10.0<\/code><\/p>\n\n\n\n<p><code>num = num * 5<\/code><\/p>\n\n\n\n<p><code>print(num)<\/code><\/p>\n\n\n\n<p><code>#\u6216\u8005*=<\/code><\/p>\n\n\n\n<p><code>num = 10.0<\/code><\/p>\n\n\n\n<p><code>num *= 5<\/code><\/p>\n\n\n\n<p><code>print(num)<\/code><\/p>\n\n\n\n<p>11.0<\/p>\n\n\n\n<p>11.0<\/p>\n\n\n\n<p>50.0<\/p>\n\n\n\n<p>50.0<\/p>\n\n\n\n<p><strong>3.4 &nbsp;\u7c7b\u578b\u8f6c\u5316<\/strong><\/p>\n\n\n\n<p>str\uff0cint\uff0cfloat\u6570\u636e\u7c7b\u578b\u76f8\u4e92\u8f6c\u5316\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#\u5c06string\u5185\u5bb9\u4e3a\u6570\u5b57\uff0c\u5b57\u7b26\u4e32\u76f8\u8fde<\/code><\/p>\n\n\n\n<p><code>num1 = '10'<\/code><\/p>\n\n\n\n<p><code>num2 = '20'<\/code><\/p>\n\n\n\n<p><code>num3 = '30.0'<\/code><\/p>\n\n\n\n<p><code>print('\u5b57\u7b26\u4e32\u76f8\u8fde\uff1a',num1+num2+num3)<br>#\u4f7f\u7528int()\u51fd\u6570\u5c06\u5b57\u7b26\u578b\u8f6c\u6362\u4e3aint\uff0cfloat\u51fd\u6570\u5c06\u5b57\u7b26\u578b\u8f6c\u6362\u4e3afloat<\/code><\/p>\n\n\n\n<p><code>num1_int = int(num1)<\/code><\/p>\n\n\n\n<p><code>num2_int = int(num2)<\/code><\/p>\n\n\n\n<p><code>num3_int = int(float(num3))<\/code><\/p>\n\n\n\n<p><code>print('\u6570\u503c\u76f8\u52a0\uff1a',num1_int + num2_int + num3_int)<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5b57\u7b26\u4e32\u76f8\u8fde\uff1a102030.0<br>\u6570\u503c\u76f8\u52a0\uff1a60<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><\/h4>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u4e09\u5927\u6570\u636e\u7ed3\u6784<\/h2>\n\n\n\n<p><strong>4.1&nbsp;&nbsp;\u5217\u8868<\/strong><\/p>\n\n\n\n<p><strong>4.1.1&nbsp;&nbsp;\u521d\u8bc6\u5217\u8868<\/strong><\/p>\n\n\n\n<p>\u5217\u8868\u662f Python \u4e2d\u4f7f\u7528\u6700\u9891\u7e41\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u5bf9\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u4fee\u6539\u548c\u5220\u9664\uff0c\u4e14\u5217\u8868\u662f\u6709\u5e8f\u7684\uff0c\u6bcf\u4e2a\u5143\u7d20\u7684\u4f4d\u7f6e\u662f\u786e\u5b9a\u7684\uff0c\u53ef\u4ee5\u7528\u7d22\u5f15\u53bb\u8bbf\u95ee\u6bcf\u4e2a\u5143\u7d20\uff0c\u5e76\u4e14\uff0c\u5217\u8868\u4e2d\u7684\u5143\u7d20\u53ef\u4ee5\u662fPython\u4e2d\u7684\u4efb\u4f55\u5bf9\u8c61\uff0c\u6bd4\u5982\u5b57\u7b26\u4e32\u3001\u6574\u6570\u3001\u5143\u7ec4\u3001\u4e5f\u53ef\u4ee5\u662flist\u7b49Python\u4e2d\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5217\u8868\u5b9a\u4e49<\/code><\/p>\n\n\n\n<p><code>lst = [1,2,3,4,5,6,7,8,9]<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[1, 2, 3, 4, 5, 6, 7, 8, 9]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>lst = list(range(5))<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3, 4]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u7c7b\u578b\u548c\u957f\u5ea6<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><code>type(lst)<\/code><\/p>\n\n\n\n<p><code>len(lst)<\/code><\/p>\n\n\n\n<p><strong>4.1.2&nbsp;&nbsp;\u7d22\u5f15\u548c\u5207\u7247<\/strong><\/p>\n\n\n\n<p>\u4f7f\u7528[\u5934\u4e0b\u6807:\u5c3e\u4e0b\u6807]\u6765\u622a\u53d6\u90e8\u5206\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d\u4e0b\u6807\u662f\u4ece 0 \u5f00\u59cb\u7b97\u8d77\uff0c\u53ef\u4ee5\u662f\u6b63\u6570\u6216\u8d1f\u6570\uff0c\u4e0b\u6807\u53ef\u4ee5\u4e3a\u7a7a\u8868\u793a\u53d6\u5230\u5934\u6216\u5c3e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhr6pBMltqTv8DW5ZtkVDftxFhUFficDCw2xsOVVJXePVriaLXWWUqzqCYQ\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u7d22\u5f15<\/code><\/p>\n\n\n\n<p><code>lst = [1,2,3,4,5,6,7,8,9]<\/code><\/p>\n\n\n\n<p><code>lst[0]<\/code><\/p>\n\n\n\n<p><code>lst[-1]<\/code><\/p>\n\n\n\n<p>9<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5207\u7247<\/code><\/p>\n\n\n\n<p><code>lst[0:4]<\/code><\/p>\n\n\n\n<p><code>lst[:4]<\/code><\/p>\n\n\n\n<p><code>lst[0:4:1]<\/code><\/p>\n\n\n\n<p><code>lst[:]<\/code><\/p>\n\n\n\n<p><code>lst[::-1]<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3]<\/p>\n\n\n\n<p>[0, 1, 2, 3]<\/p>\n\n\n\n<p>[0, 1, 2, 3]<\/p>\n\n\n\n<p>[0, 1, 2, 3, 4]<\/p>\n\n\n\n<p>[4, 3, 2, 1, 0]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>lst[::1] #\u7f3a\u7701\u4e3a1\uff0c\u9ed8\u8ba4\u95f4\u9694\u4e00\u4e2a\u4f4d\u7f6e\u63d0\u53d6<\/code><\/p>\n\n\n\n<p><code>lst[::2] #\u6b65\u957f\u4e3a 2\uff08\u95f4\u9694\u4e00\u4e2a\u4f4d\u7f6e\uff09\u6765\u622a\u53d6<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3, 4]<\/p>\n\n\n\n<p>[0, 2, 4]<\/p>\n\n\n\n<p><strong>4.1.3 \u65b9\u6cd5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># append,\u5217\u8868\u672b\u5c3e\u6dfb\u52a0\u65b0\u7684\u5bf9\u8c61<\/code><\/p>\n\n\n\n<p><code>lst = [0,1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst.append(5)<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3, 4, 5]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#extend\u5408\u5e76\u5217\u8868\u5185\u5bb9<\/code><\/p>\n\n\n\n<p><code>lst = [0,1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst.extend([5])<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3, 4, 5]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#insert\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u6570\u636e<\/code><\/p>\n\n\n\n<p><code>lst = [0,1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst.insert(1,5)<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[0, 5, 1, 2, 3, 4]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>lst = [0,1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst.copy()<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3, 4]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># remove<\/code><\/p>\n\n\n\n<p><code>lst = [0,1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst.remove(4)<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[0, 1, 2, 3]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># count,index<\/code><\/p>\n\n\n\n<p><code>lst = [7,8,5,4,3,3,5,6,7,5]<\/code><\/p>\n\n\n\n<p><code>lst.count(5)<\/code><\/p>\n\n\n\n<p><code>lst.index(3)<\/code><\/p>\n\n\n\n<p>3<\/p>\n\n\n\n<p>4<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u9ed8\u8ba4\u5347\u5e8f\u6392\u5217<\/code><\/p>\n\n\n\n<p><code>lst = [7,8,5,4,3,3,5,6,7,5<\/code>]<\/p>\n\n\n\n<p><code>lst.sort()<\/code><\/p>\n\n\n\n<p><code>lst<\/code><\/p>\n\n\n\n<p>[3, 3, 4, 5, 5, 5, 6, 7, 7, 8]<\/p>\n\n\n\n<p><strong>4.1.4 \u5217\u8868\u8fd0\u7b97<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u8fd0\u7b97\u7b26\u8fd0\u7b97\uff1a+ \u548c *<\/code><\/p>\n\n\n\n<p><code>lst = [1,2,3,4]<\/code><\/p>\n\n\n\n<p><code>lst + [3,4,5]<\/code><\/p>\n\n\n\n<p><code>lst * 2<\/code><\/p>\n\n\n\n<p>[1, 2, 3, 4, 3, 4, 5]<\/p>\n\n\n\n<p>[1, 2, 3, 4, 1, 2, 3, 4]<\/p>\n\n\n\n<p><strong>4.2&nbsp;&nbsp;\u5143\u7ec4<\/strong><\/p>\n\n\n\n<p>\u5143\u7ec4\u53ef\u7406\u89e3\u4e3a\u4e00\u4e2a\u56fa\u5b9a\u5217\u8868\uff0c\u4e00\u65e6\u521d\u59cb\u5316\u5176\u4e2d\u7684\u5143\u7d20\u4fbf\u4e0d\u53ef\u4fee\u6539\uff0c\u53ea\u80fd\u5bf9\u5143\u7d20\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n\n\n\n<p><strong>4.2.1&nbsp;&nbsp;\u521d\u8bc6\u5143\u7ec4<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5143\u7ec4\u7684\u5b9a\u4e49<\/code><\/p>\n\n\n\n<p><code>t = (0, 1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t<\/code><\/p>\n\n\n\n<p>(0, 1, 2, 3, 4)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>t = tuple(range(5))<\/code><\/p>\n\n\n\n<p><code>t<\/code><\/p>\n\n\n\n<p>(0, 1, 2, 3, 4)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5c5e\u6027\u548c\u957f\u5ea6<\/code><\/p>\n\n\n\n<p><code>type(t)<\/code><\/p>\n\n\n\n<p><code>len(t)<\/code><\/p>\n\n\n\n<p>tuple<\/p>\n\n\n\n<p>Out[8]:5<\/p>\n\n\n\n<p><strong>4.2.2&nbsp;&nbsp;\u7d22\u5f15\u548c\u5207\u7247<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u7d22\u5f15<\/code><\/p>\n\n\n\n<p><code>t = (0, 1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t[0]<\/code><\/p>\n\n\n\n<p><code>t[1]<\/code><\/p>\n\n\n\n<p><code>t[-1]<\/code><\/p>\n\n\n\n<p>0<\/p>\n\n\n\n<p>1<\/p>\n\n\n\n<p>4<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5207\u7247<\/code><\/p>\n\n\n\n<p><code>t = (0, 1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t[0:4]<\/code><\/p>\n\n\n\n<p><code>t[:4]<\/code><\/p>\n\n\n\n<p><code>t[0:4:1]<\/code><\/p>\n\n\n\n<p>(0, 1, 2, 3)<\/p>\n\n\n\n<p>Out[10]:(0, 1, 2, 3)<\/p>\n\n\n\n<p>Out[10]:(0, 1, 2, 3)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>t = (0, 1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t[:]<\/code><\/p>\n\n\n\n<p><code>t[::-1]<\/code><\/p>\n\n\n\n<p>(0, 1, 2, 3, 4)<\/p>\n\n\n\n<p>Out[14]:(4, 3, 2, 1, 0)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>t = (0, 1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t[::1]<\/code><\/p>\n\n\n\n<p><code>t[::2]<\/code><\/p>\n\n\n\n<p>(0, 1, 2, 3, 4)<\/p>\n\n\n\n<p>Out[13]:(0, 2, 4)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># count---index<\/code><\/p>\n\n\n\n<p><code>t = (2, 1, 2, 4, 2)<\/code><\/p>\n\n\n\n<p><code>t.count(2)<\/code><\/p>\n\n\n\n<p><code>t.index(2)<\/code><\/p>\n\n\n\n<p><code>t.index(4)<\/code><\/p>\n\n\n\n<p>3<\/p>\n\n\n\n<p>Out[16]:0<\/p>\n\n\n\n<p>Out[16]:3<\/p>\n\n\n\n<p><strong>4.2.3&nbsp;&nbsp;\u5143\u7ec4\u8fd0\u7b97<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u8fd0\u7b97\u7b26\u8fd0\u7b97\uff1a+ \u548c *<\/code><\/p>\n\n\n\n<p><code>t = (1, 2, 3, 4)<\/code><\/p>\n\n\n\n<p><code>t + (4,5,6)<\/code><\/p>\n\n\n\n<p><code>t * 2<\/code><\/p>\n\n\n\n<p>(1, 2, 3, 4, 4, 5, 6)<\/p>\n\n\n\n<p>Out[17]:(1, 2, 3, 4, 1, 2, 3, 4)<\/p>\n\n\n\n<p><strong>4.3&nbsp;\u5b57\u5178<\/strong><\/p>\n\n\n\n<p>\u5b57\u5178\u4e2d\u7684\u6570\u636e\u5fc5\u987b\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u51fa\u73b0\uff0c\u5176\u4e2d\uff0c\u952e\u662f\u552f\u4e00\u7684\uff0c\u4e0d\u53ef\u91cd\u590d\uff0c\u503c\u53ef\u91cd\u590d\uff0c\u5b57\u5178\u4e2d\u952e(key)\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e3a\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff0c\u4e0d\u80fd\u8fdb\u884c\u4fee\u6539\uff1b\u800c\u503c(value)\u662f\u53ef\u4ee5\u4fee\u6539\u7684\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p><strong>4.3.1&nbsp;&nbsp;\u521d\u8bc6\u5b57\u5178<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5b57\u5178\u7684\u5b9a\u4e49: \u952e\u503c\u5bf9<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d<\/code><\/p>\n\n\n\n<p>{&#8216;a&#8217;: 10, &#8216;b&#8217;: 20, &#8216;c&#8217;: 30}<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u5c5e\u6027\u548c\u957f\u5ea6<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>type(d)<\/code><\/p>\n\n\n\n<p><code>len(d)<\/code><\/p>\n\n\n\n<p><strong>4.3.2&nbsp;\u7d22\u5f15\u548c\u5207\u7247<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># \u7d22\u5f15<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d['b']<\/code><\/p>\n\n\n\n<p>20<\/p>\n\n\n\n<p><strong>4.3.3&nbsp;\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># keys---values---items<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d.keys()<\/code><\/p>\n\n\n\n<p><code>d.values()<\/code><\/p>\n\n\n\n<p><code>d.items()<\/code><\/p>\n\n\n\n<p>dict_keys([&#8216;a&#8217;, &#8216;b&#8217;, &#8216;c&#8217;])<\/p>\n\n\n\n<p>Out[24]:dict_values([10, 20, 30])<\/p>\n\n\n\n<p>Out[24]:dict_items([(&#8216;a&#8217;, 10), (&#8216;b&#8217;, 20), (&#8216;c&#8217;, 30)])<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># update<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d.update({'d':40})<\/code><\/p>\n\n\n\n<p><code>d<\/code><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># pop<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d.pop('a')<\/code><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code># get<\/code><\/p>\n\n\n\n<p><code>d = {'a':10,'b':20,'c':30}<\/code><\/p>\n\n\n\n<p><code>d.get('b')<\/code><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><\/h4>\n\n\n\n<h2 class=\"wp-block-heading\">5.&nbsp;&nbsp;\u4e09\u5927\u63a7\u5236\u6d41<\/h2>\n\n\n\n<p><strong>5.1&nbsp;&nbsp;if\u8bed\u53e5<\/strong><\/p>\n\n\n\n<p>\u5f53 if &#8220;\u5224\u65ad\u6761\u4ef6&#8221; \u6210\u7acb\u65f6\uff0c\u5219\u6267\u884c\u540e\u9762\u7684\u8bed\u53e5\uff0celse \u4e3a\u53ef\u9009\u8bed\u53e5\uff0c\u5f53\u6761\u4ef6\u4e0d\u6210\u7acb\u65f6\u53ef\u4ee5\u6267\u884c\u8be5\u8bed\u53e5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhrubDmzeQKb3eFvJwDASB5VxVwITRicgiah0ibD4a07rFlMYdujNSQC7icpg\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#if...else\u8bed\u53e5<\/code>     <strong>\u7f29\u8fdb\u5f88\u91cd\u8981<\/strong><\/p>\n\n\n\n<p><code>score = 60<\/code><\/p>\n\n\n\n<p><code>if\u00a0score\u00a0&lt; 60: <\/code><\/p>\n\n\n\n<p>       <code>print('\u4e0d\u53ca\u683c') print('\u8fd8\u9700\u8981\u5728\u52aa\u529b\uff01')<\/code><\/p>\n\n\n\n<p><code>else: print('\u5f88\u68d2\uff01\u53ca\u683c\u4e86')<\/code><\/p>\n\n\n\n<p>\u5f88\u68d2\uff01\u53ca\u683c\u4e86<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#if...elif\u8bed\u53e5<\/code><\/p>\n\n\n\n<p><code>score = 75<\/code><\/p>\n\n\n\n<p><code>if score &lt;60: print('\u4e0d\u53ca\u683c') print('\u8fd8\u9700\u8981\u5728\u52aa\u529b\uff01')<\/code><\/p>\n\n\n\n<p>   <code>elif score &lt;70: print('\u6210\u7ee9\uff1a{}'.format('\u53ca\u683c'))<\/code><\/p>\n\n\n\n<p>   <code>elif score &lt;80: print('\u6210\u7ee9\uff1a{}'.format('\u4e2d\u7b49'))<\/code><\/p>\n\n\n\n<p>   <code>elif score &lt;90: print('\u6210\u7ee9\uff1a{}'.format('\u826f\u597d'))<\/code><\/p>\n\n\n\n<p>   <code>elif score &lt;100: print('\u6210\u7ee9\uff1a{}'.format('\u4f18\u79c0'))<\/code><\/p>\n\n\n\n<p>\u6210\u7ee9\uff1a\u4e2d\u7b49<\/p>\n\n\n\n<p><strong>5.2&nbsp;&nbsp;while\u8bed\u53e5<\/strong><\/p>\n\n\n\n<p>\u5728\u67d0\u7279\u5b9a\u6761\u4ef6\u4e0b\uff0c\u5faa\u73af\u6267\u884c\u67d0\u547d\u4ee4\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhrk0UhhfxEsfDoz4ibficl7ialriaicr1DtDKq7wWACg6CBMHcIXwtj62ich5g\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#whilea = 0<\/code><\/p>\n\n\n\n<p><code>i = 100<br>while i &lt; 100: <\/code><\/p>\n\n\n\n<p><code> <\/code>         <code>a=a+i\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><\/p>\n\n\n\n<p>           <code>i=i+1<\/code><\/p>\n\n\n\n<p><code>print(a)<\/code><\/p>\n\n\n\n<p>5050<\/p>\n\n\n\n<p><strong>5.3 while\u2026\u2026else\u2026\u2026\u8bed\u53e5<\/strong><\/p>\n\n\n\n<p>else\u4e2d\u7684\u8bed\u53e5\u4f1a\u5728\u5faa\u73af\u6b63\u5e38\u6267\u884c\u5b8c\uff08\u5373\u4e0d\u662f\u901a\u8fc7break\u8df3\u51fa\u800c\u4e2d\u65ad\u7684\uff09\u7684\u60c5\u51b5\u4e0b\u6267\u884c\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#while\u2026else\u2026<\/code><\/p>\n\n\n\n<p><code>a = 1<\/code><\/p>\n\n\n\n<p><code>b\u00a0=\u00a01<br>while a > b: <\/code><\/p>\n\n\n\n<p>        <code>print(a)<\/code><\/p>\n\n\n\n<p><code>else: print('\u6570\u503c\u5927\u5c0f\u76f8\u7b49')<\/code><\/p>\n\n\n\n<p>\u6570\u503c\u5927\u5c0f\u76f8\u7b49<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#while\u2026if\u2026else\u2026<\/code><\/p>\n\n\n\n<p><code>a = 1<\/code><\/p>\n\n\n\n<p><code>b = 1<br><br>while a > b: <\/code><\/p>\n\n\n\n<p>        <code>print(a) <\/code><\/p>\n\n\n\n<p><code>if a &lt; b:\u00a0\u00a0\u00a0\u00a0 <\/code><\/p>\n\n\n\n<p>         <code>print(b)<\/code><\/p>\n\n\n\n<p><code>else: print('\u6570\u503c\u5927\u5c0f\u76f8\u7b49')<\/code><\/p>\n\n\n\n<p>\u6570\u503c\u5927\u5c0f\u76f8\u7b49<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#break \u8bed\u53e5\uff0c\u8df3\u51fa\u5f53\u524d\u5faa\u73af\uff0c\u7ed3\u675f\u8bed\u53e5<\/code><\/p>\n\n\n\n<p><code>a = 10<\/code><\/p>\n\n\n\n<p><code>b = 50<br>while a &lt; b: <\/code><\/p>\n\n\n\n<p>          <code>print(b) <\/code><\/p>\n\n\n\n<p>          <code>a += 10<\/code><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>a = 10<\/code><\/p>\n\n\n\n<p><code>b\u00a0=\u00a050<br>while a &lt; b:<\/code><\/p>\n\n\n\n<p><code>    print(b)<\/code><\/p>\n\n\n\n<p>     <code> a += 10<\/code><\/p>\n\n\n\n<p>    <code> break<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>5.4\u00a0for \u5faa\u73af\u8bed\u53e5<\/strong><\/p>\n\n\n\n<p>\u5bf9\u96c6\u5408\uff08\u5982\u5217\u8868\u6216\u5143\u7ec4\uff09\u6216\u8fed\u4ee3\u5668\u8fdb\u884c\u8fed\u4ee3\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/mmbiz.qpic.cn\/mmbiz_png\/wR59HMg1LuUBUwLYQIMxSQDtFnbAsZhrM4CVcB8iay3a4zY58gXIwvErCkMicGZOO1mohEREeRJWOpicsrlYffRibg\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1&amp;wx_co=1\" alt=\"\u56fe\u7247\"\/><\/figure>\n\n\n\n<p>range\u51fd\u6570\u7528\u4e8e\u4ea7\u751f\u4e00\u7ec4\u95f4\u9694\u76f8\u7b49\u7684\u6574\u6570\u5e8f\u5217\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0c\u53ef\u4ee5\u6307\u5b9a\u8d77\u59cb\u503c\u3001\u7ec8\u6b62\u503c\u4ee5\u53ca\u6b65\u957f\uff0c\u5e38\u7528\u4e8e\u6309\u7d22\u5f15\u5bf9\u5e8f\u5217\u8fdb\u884c\u8fed\u4ee3\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>a=0<\/code><\/p>\n\n\n\n<p><code>for i in range(1,101): <\/code><\/p>\n\n\n\n<p><code> <\/code>     <code>a = a+i<\/code><\/p>\n\n\n\n<p><code>print(a)<\/code><\/p>\n\n\n\n<p>5050<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#for<\/code><\/p>\n\n\n\n<p><code>for i in range(1,5): <\/code><\/p>\n\n\n\n<p>       <code>print(i * 10)<\/code><\/p>\n\n\n\n<p>10<\/p>\n\n\n\n<p>20<\/p>\n\n\n\n<p>30<\/p>\n\n\n\n<p>40<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>#for\u2026if\u2026else\u2026<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><code>for i in range(1,5): <\/code><\/p>\n\n\n\n<p>          <code>if i &lt; 3: print(str(i) + 'Python')<\/code><\/p>\n\n\n\n<p>        <code> else: print(str(i) + 'Java')<\/code><\/p>\n\n\n\n<p>1Python<\/p>\n\n\n\n<p>2Python<\/p>\n\n\n\n<p>3Java<\/p>\n\n\n\n<p>4Java<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>for i in range(1,5): <\/code><\/p>\n\n\n\n<p>       <code>print(i) <\/code><\/p>\n\n\n\n<p>       <code>if i > 2: <\/code><\/p>\n\n\n\n<p>       <code>break<\/code><\/p>\n\n\n\n<p>1<\/p>\n\n\n\n<p>2<\/p>\n\n\n\n<p>3<\/p>\n\n\n\n<p><strong>5.5\u5faa\u73af\u63a7\u5236\u8bed\u53e5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>break\uff1a\u7ed3\u675f\uff08\u7ec8\u6b62\uff09\u5faa\u73af<\/li>\n\n\n\n<li>continue\uff1a\u4e2d\u6b62\u5f53\u524d\u5faa\u73af\uff0c\u8df3\u5230\u4e0b\u4e00\u6b21\u5faa\u73af\u7684\u5f00\u59cb<\/li>\n\n\n\n<li>while true\/break\uff1a\u5b9e\u73b0\u4e00\u4e2a\u6c38\u8fdc\u4e0d\u4f1a\u81ea\u5df1\u505c\u6b62\u7684\u5faa\u73af<\/li>\n\n\n\n<li>else\uff1a\u5728\u4f7f\u7528break\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528else\u8bed\u53e5\u5728\u6ca1\u6709\u8c03\u7528break\u65f6\u6267\u884c\u5bf9\u5e94\u7684\u8bed\u53e5<\/li>\n\n\n\n<li>pass\uff1a\u4e0d\u505a\u4efb\u4f55\u4e8b\u60c5\uff0c\u4e00\u822c\u7528\u505a\u5360\u4f4d\u8bed\u53e5<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<p><code>for\u00a0a\u00a0in\u00a0'This\u00a0is\u00a0Python!':<\/code><\/p>\n\n\n\n<p>     <code> if a == ' ': pass <\/code><\/p>\n\n\n\n<p>      <code>print('passed!')<\/code><\/p>\n\n\n\n<p>    <code> break print(a)<\/code><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>&#8211;\u00a0END &#8211;<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python\u6709\u4e94\u4e2a\u6807\u51c6\u7684\u6570\u636e\u7c7b\u578b \u4e07\u4e08\u9ad8\u697c\u5e73\u5730\u8d77\uff0c\u8fd9\u4e94\u4e2a\u6807\u51c6\u7684\u6570\u636e\u7c7b\u578b\u8bb2\u8d2f\u7a7f\u4e8e\u6574\u4e2aPython Python\u652f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-135","post","type-post","status-publish","format-standard","hentry","category-python"],"blocksy_meta":"","_links":{"self":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/comments?post=135"}],"version-history":[{"count":14,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/135\/revisions"}],"predecessor-version":[{"id":149,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/posts\/135\/revisions\/149"}],"wp:attachment":[{"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/media?parent=135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/categories?post=135"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ai.gitpp.com\/index.php\/wp-json\/wp\/v2\/tags?post=135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}