问题描述
据我了解，python将打印输出的repr，但显然并非总是如此.例如:
It was my understanding that python will print the repr of the output, but this is apparently not always the case. For example:
在ipython中:
In [1]: type([])
Out[1]: list
In [2]: set([3,1,2])
Out[2]: {1, 2, 3}
在python中:
>>> type([])
<type 'list'>
>>> set([3,1,2])
set([1, 2, 3])
ipython对输出应用什么转换?
What transformation does ipython apply on the output?
推荐答案
IPython使用IPython.lib.pretty.RepresentationPrinter.pretty方法代替repr或标准pprint模块打印输出.
Instead of repr or standard pprint module IPython uses IPython.lib.pretty.RepresentationPrinter.pretty method to print the output.
模块IPython.lib.pretty提供了两个在后台使用RepresentationPrinter.pretty的功能.
Module IPython.lib.pretty provides two functions that use RepresentationPrinter.pretty behind the scenes.
IPython.lib.pretty.pretty函数返回对象的字符串表示形式:
IPython.lib.pretty.pretty function returns the string representation of an object:
>>> from IPython.lib.pretty import pretty
>>> pretty(type([]))
'list'
IPython.lib.pretty.pprint函数打印对象的表示形式:
IPython.lib.pretty.pprint function prints the representation of an object:
>>> from IPython.lib.pretty import pprint
>>> pprint(type([]))
list
IPython使用其自己的漂亮打印机，因为标准的Python pprint模块不允许开发人员提供自己的漂亮打印回调."
IPython uses its own pretty printer because the standard Python pprint module "does not allow developers to provide their own pretty print callbacks."
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