I noticed all 3 -> class foo, class foo() and class foo(object) can be used but i am confused as to what is the difference between these 3, if there is any? (I mean in properties mainly, python3)
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问题:
回答1:
Let's break them down:
class foo:- Python 3: It's usually the way to go. By default, Python adds
objectas the base class for you. - Python 2: It creates an old style
classobjthat will cause you all sorts of headaches.
- Python 3: It's usually the way to go. By default, Python adds
class foo():- Python 3 and Python 2: Similar to
class foofor both Python versions, trim it off, it looks ugly and makes no difference.
- Python 3 and Python 2: Similar to
class foo(object):- Python 3 and Python 2: In both Pythons, results in a new style class that has all the goodies most know. People usually use this form when writing code that might be used in Python
2too, explicitly inheriting from object causes the class to be new style in Python 2 and makes no difference in 3 (apart from some extra typing).
- Python 3 and Python 2: In both Pythons, results in a new style class that has all the goodies most know. People usually use this form when writing code that might be used in Python
