117 lines
2.9 KiB
Markdown
117 lines
2.9 KiB
Markdown
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## 我为什么选择了Python
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目前，Python语言的发展势头在国内国外都是不可阻挡的，Python凭借其简单优雅的语法，强大的生态圈从众多语言中脱颖而出，如今已经是稳坐编程语言排行榜前三的位置。国内很多Python开发者都是从Java开发者跨界过来的，我自己也不例外。我简单的跟大家交代一下，我为什么选择了Python。
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### Python vs. Java
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我们通过几个例子来比较一下，做同样的事情Java和Python的代码都是怎么写的。
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例子1：在终端中输出“hello, world”。
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Java代码：
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```Java
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class Test {
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public static void main(String[] args) {
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System.out.println("hello, world");
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}
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}
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```
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Python代码：
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```Python
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print('hello, world')
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```
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例子2：从1到100求和。
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Java代码：
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```Java
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class Test {
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public static void main(String[] args) {
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int total = 0;
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for (int i = 1; i <= 100; i += 1) {
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total += i;
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}
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System.out.println(total);
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}
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}
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```
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Python代码：
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```Python
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print(sum(range(1, 101)))
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```
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例子3：双色球随机选号。
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Java代码：
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```Java
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import java.util.List;
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import java.util.ArrayList;
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import java.util.Collections;
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class Test {
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/**
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* 产生[min, max)范围的随机整数
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*/
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public static int randomInt(int min, int max) {
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return (int) (Math.random() * (max - min) + min);
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}
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public static void main(String[] args) {
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// 初始化备选红色球
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List<Integer> redBalls = new ArrayList<>();
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for (int i = 1; i <= 33; ++i) {
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redBalls.add(i);
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}
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List<Integer> selectedBalls = new ArrayList<>();
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// 选出六个红色球
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for (int i = 0; i < 6; ++i) {
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selectedBalls.add(redBalls.remove(randomInt(0, redBalls.size())));
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}
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// 对红色球进行排序
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Collections.sort(selectedBalls);
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// 添加一个蓝色球
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selectedBalls.add(randomInt(1, 17));
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// 输出选中的随机号码
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for (int i = 0; i < selectedBalls.size(); ++i) {
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System.out.printf("%02d ", selectedBalls.get(i));
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if (i == selectedBalls.size() - 2) {
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System.out.print("| ");
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}
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}
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System.out.println();
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}
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}
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```
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Python代码：
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```Python
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from random import randint, sample
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# 初始化备选红色球
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red_balls = [x for x in range(1, 34)]
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# 选出六个红色球
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selected_balls = sample(red_balls, 6)
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# 对红色球进行排序
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selected_balls.sort()
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# 添加一个蓝色球
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selected_balls.append(randint(1, 16))
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# 输出选中的随机号码
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for index, ball in enumerate(selected_balls):
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print('%02d' % ball, end=' ')
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if index == len(selected_balls) - 2:
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print('|', end=' ')
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print()
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```
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相信，看完这些例子后，你一定感受到了我选择了Python是有道理的。
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