浅谈Python中数据解析
作者:hebedich 时间:2021-07-02 20:47:00
Import os; -- Python自带
print(os.getcwd()) -- 获得当前工作目录
os.chdir('/Users/longlong/Documents') -- 转换到/Users/longlong/Documents目录
os.path.join(parm1, parm2,...) -- 从一个或多个路径片段中构造一个路径名。
os.path.expanduser() -- 用来将包含~符号的路径扩展为完整的路径
>>> pathname = '/Users/pilgrim/diveintopython3/examples/humansize.py'
>>> os.path.split(pathname) --('/Users/pilgrim/diveintopython3/examples', 'humansize.py')罗列目录内容构造绝对路径
>>> import os
>>> print(os.getcwd())
/Users/longlong/Documents
>>> os.chdir("./python/")
>>> os.getcwd()
'/Users/longlong/Documents/python'
>>> print(os.path.realpath('whileloop.py')
)
/Users/longlong/Documents/python/whileloop.py
>>> print(os.path.realpath("whileloop.py"))
/Users/longlong/Documents/python/whileloop.py
>>>
列表解析
>>> [os.path.realpath(f) for f in glob.glob("*.py")]
['/Users/longlong/Documents/python/indices_over_two_objects.py', '/Users/longlong/Documents/python/loops_over_indices.py', '/Users/longlong/Documents/python/while_loops.py']<br>
>>> [f for f in glob.glob("*.py") if os.stat(f).st_size > 700]
['indices_over_two_objects.py', 'while_loops.py']
1
字典解析
>>> metadat_dict = { f:os.stat(f) for f in glob.glob('*.py')}
>>> type(metadat_dict)
<class 'dict'>
>>> list(metadat_dict.keys())
['indices_over_two_objects.py', 'while_loops.py', 'loops_over_indices.py']
>>> metadat_dict['indices_over_two_objects.py'].st_size
871
>>> list(metadat_dict.keys())
['indices_over_two_objects.py', 'while_loops.py', 'loops_over_indices.py']
>>> a_dict = {'a':1, 'b':2,'c':3}
>>> {value:key for key,value in a_dict.items()}
{1: 'a', 2: 'b', 3: 'c'}
集合解析
>>> a_set = set(range(10))
>>> a_set
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
>>> {x**2 for x in a_set}
{0, 1, 64, 4, 36, 9, 16, 49, 81, 25}
>>> {x for x in a_set if x%2 == 0 }
{0, 8, 2, 4, 6}
>>> {2**x for x in range(10)}
{32, 1, 2, 64, 4, 128, 256, 512, 8, 16}
以上所述就是本文的全部内容了,希望大家能够喜欢。
标签:Python,数据解析
![](/images/zang.png)
![](/images/jiucuo.png)
猜你喜欢
巧用weui.topTips验证数据的实例
2023-08-12 03:00:51
![](https://img.aspxhome.com/file/2023/2/55982_0s.png)
详解Python的多线程定时器threading.Timer
2023-04-07 03:33:43
asp,php,.net使用301重定向方法
2007-09-26 14:05:00
Python机器学习应用之基于天气数据集的XGBoost分类篇解读
2023-09-12 05:45:07
![](https://img.aspxhome.com/file/2023/1/128521_0s.png)
内容,而不是Chrome
2008-10-16 13:43:00
Python的10道简单测试题(含答案)
2021-12-28 03:57:24
Python Matplotlib通过plt.subplots创建子绘图
2022-06-03 08:23:16
![](https://img.aspxhome.com/file/2023/5/98905_0s.png)
WorkBench管理操作MySQL
2010-10-14 14:21:00
![](https://img.aspxhome.com/file/UploadPic/201010/14/20101014143458336s.png)
python matplotlib折线图样式实现过程
2022-10-28 12:18:08
![](https://img.aspxhome.com/file/2023/5/90875_0s.png)
python实现公司年会抽奖程序
2022-12-19 15:35:27
python实现两张图片拼接为一张图片并保存
2023-01-26 17:56:52
![](https://img.aspxhome.com/file/2023/4/107684_0s.png)
关于adfuller函数返回值的参数说明与记录
2023-03-07 13:33:14
使用批处理脚本自动生成并上传NuGet包(操作方法)
2021-12-24 18:05:34
![](https://img.aspxhome.com/file/2023/7/105707_0s.png)
ansible-playbook实现自动部署KVM及安装python3的详细教程
2021-09-02 23:13:12
.NET反向代理组件YARP介绍
2023-07-23 02:29:45
![](https://img.aspxhome.com/file/2023/8/78088_0s.png)
python实现堆栈与队列的方法
2023-06-19 02:57:04
asp如何定时执行约定的页面?
2009-11-15 20:17:00
oracle的一些tips技巧
2009-03-02 11:06:00
PHPStudy hosts文件可能不存在或被阻止打开及同步hosts失败问题
2023-06-08 10:29:10
![](https://img.aspxhome.com/file/2023/4/55494_0s.jpg)
CSS框架带来的效率提升
2007-12-27 20:01:00