python實用庫：PrettyTable 學習

時間 2019-11-07

標籤 python 實用 prettytable 學習欄目 Python 简体版

原文原文鏈接

python實用庫：PrettyTable 學習

PrettyTable說明

PrettyTable 是python中的一個第三方庫，可用來生成美觀的ASCII格式的表格，十分實用。
如下爲官方介紹：html

A simple Python library for easily displaying tabular data in a visually appealing ASCII table format.
PrettyTable is a simple Python library designed to make it quick and easy to represent tabular data in visually appealing ASCII tables. It was inspired by the ASCII tables used in the PostgreSQL shell psql. PrettyTable allows for selection of which columns are to be printed, independent alignment of columns (left or right justified or centred) and printing of 「sub-tables」 by specifying a row range.python

PrettyTable安裝

使用pip便可十分方便的安裝PrettyTable，以下：git

pip install PrettyTable

PrettyTable使用示例

github上有PrettyTable的使用說明，連接以下：https://github.com/dprince/python-prettytablegithub

如下是具體的使用示例：sql

import prettytable as pt

## 按行添加數據
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      |
+-----------+------+------------+-----------------+

## 按列添加數據
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   |
+-----------+------+------------+-----------------+-------+

## 使用不一樣的輸出風格
tb.set_style(pt.MSWORD_FRIENDLY)
print('--- style：MSWORD_FRIENDLY -----')
print(tb)

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

## 隨機風格，每次不一樣
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，獲取表格字符串
s = tb.get_string()
print(s)

## 能夠只獲取指定列或行
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   |
+-----------+------------+

## 自定義表格輸出樣式
### 設定左對齊
tb.align = 'l'
### 設定數字輸出格式
tb.float_format = "2.2"
### 設定邊框鏈接符爲'*"
tb.junction_char = "*"
### 設定排序方式
tb.sortby = "City name"
### 設定左側不填充空白字符
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          |
*----------*-----*-----------*----------------*

## 不顯示邊框
tb.border = 0
print(tb)

## 修改邊框分隔符
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也支持輸出HTML代碼
s = tb.get_html_string()
print(s)

<table>
    <tr>
        <th>City name</th>
        <th>Area</th>
        <th>Population</th>
        <th>Annual Rainfall</th>
    </tr>
    <tr>
        <td>Adelaide</td>
        <td>1295</td>
        <td>1158259</td>
        <td>600.50</td>
    </tr>
    <tr>
        <td>Brisbane</td>
        <td>5905</td>
        <td>1857594</td>
        <td>1146.40</td>
    </tr>
    <tr>
        <td>Darwin</td>
        <td>112</td>
        <td>120900</td>
        <td>1714.70</td>
    </tr>
    <tr>
        <td>Hobart</td>
        <td>1357</td>
        <td>205556</td>
        <td>619.50</td>
    </tr>
</table>

## 使用copy方法複製對象
#tb.set_style(pt.DEFAULT)
tb.horizontal_char = '.'
tb2 = tb.copy()
tb.align  = 'l'
tb2.align = 'r'
print(tb)
print(tb2)

## 直接賦值，獲得的是索引
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 |
+-----------+------+------------+-----------------+