On 2018-05-13 21:02, Mike McClain wrote:
I'm new to Python and OOP.
Python en 2.7.14 Documentation The Python Language Reference
3. Data model
3.1. Objects, values and types
An object's type is also unchangeable. [1]
[1] It is possible in some cases to change an object's type,
under certain controlled conditions.
It appears to me as if an object's type is totally mutable and
solely dependant on assignment.
obj = 'a1b2'
obj
'a1b2'
type (obj)
<type 'str'>
obj = list(obj)
obj
['a', '1', 'b', '2']
type (obj)
<type 'list'>
obj = dict( zip(obj[0::2],obj[1::2]) )
type (obj)
<type 'dict'>
obj
{'a': '1', 'b': '2'}
At what level does my understanding break down?
You're not mutating an object, you're creating new objects and then
binding them to the same name.
The name 'obj' refers to a string, then a list, etc.
BTW, you should be using Python 3 unless you really need Python 2.
Python 2.7 is the last in the Python 2 line, and it'll not longer be
supported after 2020.
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