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[pprint]更易读的打印

参考：

pprint — Data pretty printer

python中pprint模块

相比于print，pprint提供了更加易读的打印结果

>>> import pprint
>>> stuff = ['spam', 'eggs', 'lumberjack', 'knights', 'ni']
>>> stuff.insert(0, stuff)
>>> print(stuff)
[[...], 'spam', 'eggs', 'lumberjack', 'knights', 'ni']
>>> pprint.pprint(stuff)
[<Recursion on list with id=139827371606416>,
 'spam',
 'eggs',
 'lumberjack',
 'knights',
 'ni']