本文实例讲述了Python编程入门之Hello World的三种实现方式。分享给大家供大家参考，具体如下：
第一种方式：
$python
>>>print('hello world')
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屏幕上输出hello world
print是一个常用函数
第二种方式：
复制代码 代码如下:
$python hello.py
第三种方式：
#!/usr/bin/env python
chmod 755 hello.py
./hello.py
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希望本文所述对大家Python程序设计有所帮助。
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