Python环境配置

mac查看python版本

直接打开mac终端运行python

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mac终端退出python环境

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在mac中的存放路径为

/系统/资源库/Frameworks/Python.framework/Versions

python下载地址

https://www.python.org/downloads/
mac默认安装了python2.7，current表示正在使用的版本

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安装pipenv

$ brew install pipenv

1. 提示我Error（Error: The following directories are not writable by your user: /usr/local/share/man/man7）

   
   
   

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2. 终端输入

sudo chown -R $(whoami) /usr/local/share/man/man5 /usr/local/share/man/man7

3. 然后提示输入密码。
4. 然后重新，即可成功安装。

$ brew install pipenv

python3安装好后，在命令行当中，运行python都仍然是指向python2，设置默认是python3

1. 終端当中，打开并编辑 .bash_profile文件。
   运行命令：vi ~/.bash_profile
   按 i 进入编辑状态，添加一行配置：
   alias python="/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8"

   
   
   

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   按ESC和:后，再输入wq保存和退出。

2. 在终端当中，重新加载bash_profile.sh文件数据。
   运行命令：source .bash_profile

   
   
   

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3、在终端当中，运行命令python指向的就是python3.

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pip，安装完pip之后可以安装各种pakage了

与配置python一样的方式。

1. 用vi命令编辑bash_profile 文件 。

在其中加入以下2行(第1行是加入到环境变量中，第2行是取别名为pip)：

export PATH=$PATH:/Library/Frameworks/Python.framework/Versions/3.8/bin/pip3.8
alias pip="/Library/Frameworks/Python.framework/Versions/3.8/bin/pip3.8"

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按ESC和:后，再输入wq保存和退出。

2. 在终端当中，重新加载bash_profile.sh文件数据。
   运行命令：source .bash_profile

3、在终端当中，去运行pip就可以得到python38下的pip3了。

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安装requests （用于请求）

pip install requests

安装beautifulsoup4

pip install beautifulsoup4

安装PyCharm

激活码

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第一个python程序

写一个halloWord.py文件

print("hallo word!")

终端cd到halloWord.py文件目录, 输入下面的命令即可运行代码

python halloWord.py

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环境已经安装完毕

下一篇准备按照链接2，3开始学习。

学习参考：
https://www.lizenghai.com/archives/12609.html
https://blog.csdn.net/c406495762/article/details/78123502
https://github.com/Jack-Cherish/python-spider