reprlib 模块提供了一个定制化版本的 repr() 函数,用于缩略显示大型或深层嵌套的容器对象:
>>>
import reprlib
reprlib.repr(set('supercalifragilisticexpialidocious'))
"{'a', 'c', 'd', 'e', 'f', 'g', ...}"
pprint 模块提供了更加复杂的打印控制,其输出的内置对象和用户自定义对象能够被解释器直接读取。当输出结果过长而需要折行时,“美化输出机制”会添加换行符和缩进,以更清楚地展示数据结构:
>>>
import pprint
t = [[[['black', 'cyan'], 'white', ['green', 'red']], [['magenta',
'yellow'], 'blue']]]
pprint.pprint(t, width=30)
[[[['black', 'cyan'],
'white',
['green', 'red']],
[['magenta', 'yellow'],
'blue']]]
textwrap 模块能够格式化文本段落,以适应给定的屏幕宽度:
>>>
import textwrap
doc = """The wrap() method is just like fill() except that it returns
a list of strings instead of one big string with newlines to separate
the wrapped lines."""
print(textwrap.fill(doc, width=40))
The wrap() method is just like fill()
except that it returns a list of strings
instead of one big string with newlines
to separate the wrapped lines.
locale 模块处理与特定地域文化相关的数据格式。locale 模块的 format 函数包含一个 grouping 属性,可直接将数字格式化为带有组分隔符的样式:
>>>
import locale
locale.setlocale(locale.LC_ALL, 'English_United States.1252')
'English_United States.1252'
conv = locale.localeconv() # get a mapping of conventions
x = 1234567.8
locale.format_string("%d", x, grouping=True)
'1,234,567'
locale.format_string("%s%.*f", (conv['currency_symbol'],
conv['frac_digits'], x), grouping=True)
'$1,234,567.80' |