Definition
A programmer-defined type is called a class.
# Class definition
#
# A programmer-defined type is called a class.
# A class definition cannot be empty.
class Point:
""" a 2D point """ # body docstring comment
class Point:
def get():
return (1, 1) # tuple
assert Point.get() == (1, 1)
assert Point.get() != None
p = Point()
assert Point.get() == (1, 1)
assert Point.get() != None
Factory
A class is like a factory for creating objects.
# A class is like a factory for creating objects.
# Because Point is defined at top level, its name contains __main__
class Point:
""" a 2D point """
p = Point()
print(p) # __main__.Point object
Dict
Like most Python objects, an empty class has a dictionary by default.
# An empty class has a dictionary that ...
# holds the attributes of the object.
class A(object):
pass
A = A()
A.__dict__ = {
'key11': 1,
'key2': 2,
}
A.__dict__['key2'] = 3
print(A.__dict__['key2']) # 3
Last update: 262 days ago
