Using Python class properties decorators.

In python we can use class properties declaration,getter and setters to validate data or for using custom computation.

class Book(object):
def title(self):
return self._title
def title(self, value):
if value is None or "" == value.strip():
raise ValueError("Title should have proper value!")
self._title = value
return self._title
if __name__=='__main__':
b = Book()
b.title = "Intro Of Python"
print b.title

Check Python DOCS

This property decorator only works for New Style Python classes

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