python3.7入门系列一 Win7下安装python3.7

╰+攻爆jí腚メ 2022-02-20 07:49 1520阅读 0赞

本文为Python3.7入门系列的第一篇，Win7安装下安装python3.7

# 一、安装python3.7 #

访问 [https://www.python.org/downloads/windows/][https_www.python.org_downloads_windows]，下载python3.7的安装程序

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70][]

双击下载的python-3.7.3-amd64.exe文件进行安装

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 1][]

勾选“Add Python 3.7 to PATH”（目的是为了将python的安装目录和其下的Scripts目录加入到PATH环境变量中），然后点击“Customize installation”，进入下一步

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 2][]

点击Next

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 3][]

输入安装路径，点击Install按钮，开始安装

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 4][]

安装结束后显示安装成功界面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 5][]

点击Close退出安装。

# 二、Hello Python #

打开命令行窗口，输入python，然后回车，显示python的版本及最后显示>>>说明python安装成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 6][]

执行print函数，输出hello python  
>>> print("hello python")  
hello python  
>>>

以后看到三个向右的箭头（>>>）即说明当前处于python的交互模式下，此时可以输入python函数或者其他语句，如执行 quit()函数可以退出命令行。

可以把 print("hello python") 保存到一个python文件（如 hello.py）中，然后在命令行执行 python hello.py

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvd2VpMDI2_size_16_color_FFFFFF_t_70 7][]

注意：执行python hello.py 时需要确认hello.py在当前目录下，否则会报错，如下  
C:\\Users\\test>python hello.py  
python: can't open file 'hello.py': \[Errno 2\] No such file or directory

此时加上python文件的完整路径也可以执行，如  
C:\\Users\\test>python d:\\hello.py  
hello python

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[https_www.python.org_downloads_windows]: https://www.python.org/downloads/windows/
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[2018111718160012.jpg]: https://img-blog.csdnimg.cn/2018111718160012.jpg
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