Python PrettyTable 模块
简介
Python通过PrettyTable模块可以将输出内容如表格方式整齐地输出。
安装
pip install prettytable
示例
from prettytable import PrettyTable
table = PrettyTable(["animal", "ferocity"])
table.add_row(["wolverine", 100])
table.add_row(["grizzly", 87])
table.add_row(["Rabbit of Caerbannog", 110])
table.add_row(["cat", -1])
table.add_row(["platypus", 23])
table.add_row(["dolphin", 63])
table.add_row(["albatross", 44])
table.sort_key("ferocity")
table.reversesort = True
print(table)
'''效果图
+----------------------+----------+
| animal | ferocity |
+----------------------+----------+
| Rabbit of Caerbannog | 110 |
| wolverine | 100 |
| grizzly | 87 |
| dolphin | 63 |
| albatross | 44 |
| platypus | 23 |
| cat | -1 |
+----------------------+----------+
'''
使用
创建表
直接创建
pt = PrettyTable()
从已有文件创建
CSV
from prettytable import from_csv
fp = open("mytable.csv", "r")
pt = from_csv(fp)
fp.close()
HTML
from prettytable import from_html
pts = from_html(html_string)
SQL
from prettytable import from_db_cursor
db_cur.execute("SELECT * FROM mytable")
pt = from_db_cursor(db_cur)
添加元素
按行添加
pt.add_row()
按列添加
pt.add_column()
输出格式
ASCII码表
直接输出
print(pt)
无表格框输出
print(pt.get_string())
HTML表
print(pt.get_html_string())
选择子表
print(pt.get_string(fields = ["City name", "Population"]))
print(pt.get_string(start = 0, end = 3))
new_table = old_table[0:3]
print(new_table)
表排序
print x.get_string(sortby="Annual Rainfall", reversesort=True)
控制表样式
自带样式
from prettytable import MSWORD_FRIENDLY
x.set_style(MSWORD_FRIENDLY)
print(x)
手动控制样式
可调整选项
摘自prettytable文档
- border - 布尔类型参数(必须是True或False)。控制表格边框是否显示。
- header - 布尔类型参数(必须是True或False)。控制表格第一行是否作为表头显示。
- header-style - 控制表头信息的大小写。允许的参数值:“cap”(每个单词首字母大写),“title”(除了介词助词首字母大写),“lower”(全部小写)或者None(不改变原内容格式)。默认参数为None。
- hrules - 设置表格内部水平边线。允许的参数值:FRAME,ALL,NONE。注意这些是在prettytable模块内部定义的变量,在使用之前导入或用类似prettytable.FRAME的方法调用。
- vrules - 设置表格内部竖直边线。允许的参数值:FRAME,ALL,NONE。
- align - 水平对齐方式(None,“l”(左对齐),“c”(居中),“r”右对齐)
- valign - 垂直对齐方式(None,“t”(顶部对齐),“m”(居中),“b”底部对齐)
- int_format - 控制整型数据的格式。
- float_format - 控制浮点型数据的格式。
- padding_width - 列数据左右的空格数量。(当左右padding未设置时生效)
- left_padding_width - 列数据左侧的空格数量。
- right_padding_width - 列数据右侧的空格数量。
- vertical_char - 绘制竖直边线的字符,默认为“|”
- horizontal_char - 绘制水平边线的字符,默认为“-”
- junction_char - 绘制水平竖直交汇点的字符,默认为“+”
- border - A boolean option (must be True or False). Controls whether or not a border is drawn around the table.
- header - A boolean option (must be True or False). Controls whether or not the first row of the table is a header showing the names of all the fields.
- header_style - Controls capitalisation of field names in the header. Allowed values: “cap” (capitalise first letter of each word), “title” (title case), “upper” (all upper-case), “lower” (all lower-case) or None (don’t change from original field name setting). Default is None.
- hrules - Controls printing of horizontal rules after rows. Allowed values: FRAME, ALL, NONE - note that these are variables defined inside the prettytable module so make sure you import them or use prettytable.FRAME etc.
- vrules - Controls printing of vertical rules between columns. Allowed values: FRAME, ALL, NONE
- align - Horizontal alignment (None, “l” (left), “c” (centre), “r” (right))
- valign - Vertical alignment (None, “t” (top), “m” (middle) or “b” (bottom))
- int_format - Controls formatting of integer data. This should be a string which can be placed between “%” and “d” in something like print “%d” % 42.
- float_format - Controls formatting of floating point data. This should be a string which can be placed between “%” and “f” in something like print “%f” % 4.2.
- padding_width - Number of spaces on either side of column data (only used if left and right paddings are None).
- left_padding_width - Number of spaces on left hand side of column data.
- right_padding_width - Number of spaces on right hand side of column data.
- vertical_char - Single character string used to draw vertical lines. Default is |.
- horizontal_char - Single character string used to draw horizontal lines. Default is -.
- junction_char - Single character string used to draw line junctions. Default is +.
用法
x = PrettyTable()
x.border = False
x.header = False
x.padding_width = 5
x = PrettyTable(border=False, header=False, padding_width=5)
以上两种设置方式等效
调整对齐方式的几种方法
print(x.get_string(align="l"))
x.align["City name"] = "l"
x.align["Population"] = "c"
x.align["Area"] = "r"
x.align = "l'
参考资料
- prettytable 文档
使用方法从文档摘取过来的 更多用法请直接参考文档
- python之PrettyTable模块
- Python prettytable.PrettyTable Examples
更多实例提供参考