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MAC:Fri Feb 04:08:48:~> python
Python 3.10.0 (v3.10.0:b494f5935c, Oct  4 2021, 14:59:19) [Clang 12.0.5 (clang-1205.0.22.11)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> x = 5
>>> type(x)
<class 'int'>
>>> x = "In the beginning ......"
>>> type(x)
<class 'str'>
>>> x.upper()
'IN THE BEGINNING ......'
>>> id(x)
4318930752
>>> hex(id(x))
'0x1016da740'
>>> y = 5
>>> id(y)
4311105904
>>> 
>>> hex(id(y))
'0x100f64170'
>>> hex(id(6))
'0x100f64190'
>>> hex(id(7))
'0x100f641b0'
>>> hex(id(100))
'0x100f64d50'
>>> hex(id(255))
'0x100f660b0'
>>> hex(id(256))
'0x100f660d0'
>>> hex(id(511))
'0x10188c0d0'
>>> hex(id(512))
'0x10188c050'
>>> hex(id(513))
'0x10188c0d0'
>>> hex(id(514))
'0x10188c050'
>>> x = 5
>>> x =  x + 2
>>> x
7
>>> dir()
['__annotations__', '__builtins__', '__doc__', '__loader__', '__name__', '__package__', '__spec__', 'x', 'y']
>>> y
5
>>>