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>第2课:写第一行代码!
第2课:写第一行代码!
2025-12-30 19:41:05
第2课:写第一行代码!
🛠 先准备一个”写字本“
我们需要一个地方写代码。有两种方式:
方式1:Python自带的IDLE(今天用这个)
什么是IDLE? 就是Python自带的一个简单”记事本“,专门用来写代码。
怎么打开?
按键盘上的 Windows键(就是那个有Windows图标的键)
输入:IDLE
看到一个叫”IDLE (Python 3.10)“的程序,点击打开
会弹出一个窗口,里面有 >>> 这个符号
这个 >>> 叫做”提示符“,意思是:Python在等你说话呢!
🎨 让电脑说第一句话
在 >>> 后面输入:
<PYTHON>
print(”你好,世界!“)
然后按回车键(Enter)
会发生什么? 电脑会显示:你好,世界!
🔍 解释一下刚才做了什么
print - 这是一个命令,意思是”打印“(显示在屏幕上)
() - 小括号,命令的”专用符号“
”“ - 双引号,表示这是文字(专业说法叫”字符串“)
你可以把引号里的内容改成任何话,比如:print(”我是小明“)
🎯 今天的小练习
试着让Python说三句话:
你的名字
你今年多大
你为什么学Python
例如:
<PYTHON>
print(”我叫小红“)
print(”我今年25岁“)
print(”我想用Python找工作“)
试完后告诉我结果! 如果有任何疑问,哪怕很小的细节都可以问我哦!😊
############################python
今天的学习过程对小白来说摔了两跤诶,记住:
(1)python只认识英文符号;
(2)想让电脑显示文字,必须给文字穿上外套!!——引号。
#编程
#程序员
#计算机专业
#入门
##############################claude
Claude老师是会夸人的
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请求信息 : 2026-02-10 16:43:15 HTTP/2.0 GET : https://f.mffb.com.cn/a/458361.html
运行时间 : 0.154676s [ 吞吐率:6.47req/s ] 内存消耗:4,101.89kb 文件加载:140
缓存信息 : 0 reads,0 writes
会话信息 : SESSION_ID=3c522eaf749aa13c92a3bfa82e82f0cc
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CONNECT:[ UseTime:0.000767s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001259s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000544s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000539s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.001098s ]
SELECT * FROM `set` [ RunTime:0.001991s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.001211s ]
SELECT * FROM `article` WHERE `id` = 458361 LIMIT 1 [ RunTime:0.005991s ]
UPDATE `article` SET `lasttime` = 1770712995 WHERE `id` = 458361 [ RunTime:0.001230s ]
SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000698s ]
SELECT * FROM `article` WHERE `id` < 458361 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005143s ]
SELECT * FROM `article` WHERE `id` > 458361 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001060s ]
SELECT * FROM `article` WHERE `id` < 458361 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001960s ]
SELECT * FROM `article` WHERE `id` < 458361 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001934s ]
SELECT * FROM `article` WHERE `id` < 458361 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001589s ]
0.157748s