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Python实用库 PrettyTable 学习笔记

分类: IT文章 • 2022-07-10 00:35:47

本文实例讲述了Python实用库 PrettyTable。分享给大家供大家参考，具体如下：

PrettyTable安装

使用pip即可十分方便的安装PrettyTable，如下：

pip install PrettyTable

PrettyTable使用示例

github上有PrettyTable的使用说明，链接如下：https://github.com/dprince/python-prettytable

以下是具体的使用示例：

import prettytable as pt

按行添加数据

tb = pt.PrettyTable()
tb.field_names = ["City name", "Area", "Population", "Annual Rainfall"]
tb.add_row(["Adelaide",1295, 1158259, 600.5])
tb.add_row(["Brisbane",5905, 1857594, 1146.4])
tb.add_row(["Darwin", 112, 120900, 1714.7])
tb.add_row(["Hobart", 1357, 205556,619.5])
print(tb)

+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
|  Adelaide | 1295 |  1158259   |      600.5      |
|  Brisbane | 5905 |  1857594   |      1146.4     |
|   Darwin  | 112  |   120900   |      1714.7     |
|   Hobart  | 1357 |   205556   |      619.5      |
+-----------+------+------------+-----------------+

按列添加数据

tb.add_column('index',[1,2,3,4])
print(tb)

+-----------+------+------------+-----------------+-------+
| City name | Area | Population | Annual Rainfall | index |
+-----------+------+------------+-----------------+-------+
|  Adelaide | 1295 |  1158259   |      600.5      |   1   |
|  Brisbane | 5905 |  1857594   |      1146.4     |   2   |
|   Darwin  | 112  |   120900   |      1714.7     |   3   |
|   Hobart  | 1357 |   205556   |      619.5      |   4   |
+-----------+------+------------+-----------------+-------+

使用不同的输出风格

tb.set_style(pt.MSWORD_FRIENDLY)
print('--- style：MSWORD_FRIENDLY -----')
print(tb)
tb.set_style(pt.PLAIN_COLUMNS)
print('--- style：PLAIN_COLUMNS -----')
print(tb)

随机风格，每次不同

tb.set_style(pt.RANDOM)
print('--- style：MSWORD_FRIENDLY -----')
print(tb)
tb.set_style(pt.DEFAULT)
print('--- style：DEFAULT -----')
print(tb)

--- style：MSWORD_FRIENDLY -----
| City name | Area | Population | Annual Rainfall |
|  Adelaide | 1295 |  1158259   |      600.5      |
|  Brisbane | 5905 |  1857594   |      1146.4     |
|   Darwin  | 112  |   120900   |      1714.7     |
|   Hobart  | 1357 |   205556   |      619.5      |
--- style：PLAIN_COLUMNS -----
City name        Area        Population        Annual Rainfall       
 Adelaide        1295         1158259               600.5            
 Brisbane        5905         1857594               1146.4           
  Darwin         112           120900               1714.7           
  Hobart         1357          205556               619.5            
--- style：MSWORD_FRIENDLY -----
@    Adelaide     1295     1158259     600.5 @
@    Brisbane     5905     1857594     1146.4@
@     Darwin      112       120900     1714.7@
@     Hobart      1357      205556     619.5 @
--- style：DEFAULT -----
+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
|  Adelaide | 1295 |  1158259   |      600.5      |
|  Brisbane | 5905 |  1857594   |      1146.4     |
|   Darwin  | 112  |   120900   |      1714.7     |
|   Hobart  | 1357 |   205556   |      619.5      |
+-----------+------+------------+-----------------+

不打印，获取表格字符串

s = tb.get_string()
print(s)

可以只获取指定列或行

s = tb.get_string(fields=["City name", "Population"],start=1,end=4)
print(s)

+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
|  Adelaide | 1295 |  1158259   |      600.5      |
|  Brisbane | 5905 |  1857594   |      1146.4     |
|   Darwin  | 112  |   120900   |      1714.7     |
|   Hobart  | 1357 |   205556   |      619.5      |
+-----------+------+------------+-----------------+
+-----------+------------+
| City name | Population |
+-----------+------------+
|  Brisbane |  1857594   |
|   Darwin  |   120900   |
|   Hobart  |   205556   |
+-----------+------------+

自定义表格输出样式

设定左对齐

tb.align = 'l'

设定数字输出格式

tb.float_format = "2.2"

设定边框连接符为'*”

tb.junction_char = "*"

设定排序方式

tb.sortby = "City name"

设定左侧不填充空白字符

tb.left_padding_width = 0
print(tb)

*----------*-----*-----------*----------------*
|City name |Area |Population |Annual Rainfall |
*----------*-----*-----------*----------------*
|Adelaide  |1295 |1158259    |600.50          |
|Brisbane  |5905 |1857594    |1146.40         |
|Darwin    |112  |120900     |1714.70         |
|Hobart    |1357 |205556     |619.50          |
*----------*-----*-----------*----------------*

不显示边框

tb.border = 0
print(tb)

修改边框分隔符

tb.set_style(pt.DEFAULT)
tb.horizontal_char = '+'
print(tb)

City name Area Population Annual Rainfall
Adelaide  1295 1158259    600.50         
Brisbane  5905 1857594    1146.40        
Darwin    112  120900     1714.70        
Hobart    1357 205556     619.50         
+++++++++++++++++++++++++++++++++++++++++++++++++++
| City name | Area | Population | Annual Rainfall |
+++++++++++++++++++++++++++++++++++++++++++++++++++
| Adelaide  | 1295 | 1158259    | 600.50          |
| Brisbane  | 5905 | 1857594    | 1146.40         |
| Darwin    | 112  | 120900     | 1714.70         |
| Hobart    | 1357 | 205556     | 619.50          |
+++++++++++++++++++++++++++++++++++++++++++++++++++

prettytable也支持输出HTML代码

s = tb.get_html_string()
print(s)
City name Area Population Annual Rainfall
Adelaide 1295 1158259 600.50
Brisbane 5905 1857594 1146.40
Darwin 112 120900 1714.70
Hobart 1357 205556 619.50

使用copy方法复制对象

tb.set_style(pt.DEFAULT)
tb.horizontal_char = '.'
tb2 = tb.copy()
tb.align = 'l'
tb2.align = 'r'
print(tb)
print(tb2)

直接赋值，得到的是索引

tb.horizontal_char = '-'
tb.aliign = 'l'
tb3 = tb
tb3.align = 'r'
print(tb)
print(tb3)

+...........+......+............+.................+
| City name | Area | Population | Annual Rainfall |
+...........+......+............+.................+
| Adelaide  | 1295 | 1158259    | 600.50          |
| Brisbane  | 5905 | 1857594    | 1146.40         |
| Darwin    | 112  | 120900     | 1714.70         |
| Hobart    | 1357 | 205556     | 619.50          |
+...........+......+............+.................+
+...........+......+............+.................+
| City name | Area | Population | Annual Rainfall |
+...........+......+............+.................+
|  Adelaide | 1295 |    1158259 |          600.50 |
|  Brisbane | 5905 |    1857594 |         1146.40 |
|    Darwin |  112 |     120900 |         1714.70 |
|    Hobart | 1357 |     205556 |          619.50 |
+...........+......+............+.................+
+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
|  Adelaide | 1295 |    1158259 |          600.50 |
|  Brisbane | 5905 |    1857594 |         1146.40 |
|    Darwin |  112 |     120900 |         1714.70 |
|    Hobart | 1357 |     205556 |          619.50 |
+-----------+------+------------+-----------------+
+-----------+------+------------+-----------------+
| City name | Area | Population | Annual Rainfall |
+-----------+------+------------+-----------------+
|  Adelaide | 1295 |    1158259 |          600.50 |
|  Brisbane | 5905 |    1857594 |         1146.40 |
|    Darwin |  112 |     120900 |         1714.70 |
|    Hobart | 1357 |     205556 |          619.50 |
+-----------+------+------------+-----------------+
---------------------

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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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