[ACCEPTED]-How to print a list, dict or collection of objects, in Python-list
Accepted answer
Yes, you need to use __repr__. A quick example of 6 its behavior:
>>> class Foo:
... def __str__(self):
... return '__str__'
... def __repr__(self):
... return '__repr__'
...
>>> bar = Foo()
>>> bar
__repr__
>>> print bar
__str__
>>> repr(bar)
'__repr__'
>>> str(bar)
'__str__'
However, if you don't define 5 a __str__, it falls back to __repr__, although this isn't 4 recommended:
>>> class Foo:
... def __repr__(self):
... return '__repr__'
...
>>> bar = Foo()
>>> bar
__repr__
>>> print bar
__repr__
All things considered, as the 3 manual recommends, __repr__ is used for debugging 2 and should return something representative of 1 the object.
Just a little enhancement avoiding the + for 1 concatenating:
def __str__(self):
return '[%s] -> [%s]' % (self.sid, self.seq)
Source:
stackoverflow.com
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