Python 3.13.6 (tags/v3.13.6:4e66535, Aug  6 2025, 14:36:00) [MSC v.1944 64 bit (AMD64)] on win32
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None
type(None)
<class 'NoneType'>
d = {'a': 50, 2: 'hello, world', 1.33: 90, 'hello': 3.1415}
d[1]
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    d[1]
KeyError: 1
>>> l = [50, 'hello world', 90, 3.1415]
>>> l[0]
50
>>> l[1]
'hello world'
>>> d['a']
50
>>> d[1.33]
90
>>> d[0] =678346
>>> d[0]
678346
>>> del d['a']
>>> d
{2: 'hello, world', 1.33: 90, 'hello': 3.1415, 0: 678346}
>>> del l[2]
>>> l
[50, 'hello world', 3.1415]
>>> del l[5]
Traceback (most recent call last):
  File "<pyshell#15>", line 1, in <module>
    del l[5]
IndexError: list assignment index out of range
>>> del d['b']
Traceback (most recent call last):
  File "<pyshell#16>", line 1, in <module>
    del d['b']
KeyError: 'b'