Python 3.10 is Released

[snippsat]

Release Python 3.10.0
One big new thing is the new switch/case statements version on steroid💪
It's called Structural Pattern Matching
A quick test:

vehicle = 'Taxi'
match vehicle:
    case 'Car':
        print('Drive yourself')
    case 'Bus'|'Taxi':
        print('Public transport')
    case _:
        print(f'{vehicle!r} not in record'

Output:
Public transport

status_code = 200
match status_code:
    case 400|401|403 :
        print("Bad request")
    case 200:
        print("Request Ok")
    case _:
        print("Something else bad happened")

Output:
Request Ok

So as excepted and | is used as as or pattern.
A nice short way to specify an isinstance() check.

my_string = 'Hello'
#my_string = 5
match my_string:
    case int():
         print("I'm a integer")
    case str():
         print("I'm a string")

Output:
I'm a string

---

Better error messages

>>> lst = [1, 2, 3
  File "<stdin>", line 1
    lst = [1, 2, 3
          ^
SyntaxError: '[' was never closed

>>> foo(x, z for z in range(10), t, w)
  File "<stdin>", line 1
    foo(x, z for z in range(10), t, w)
           ^^^^^^^^^^^^^^^^^^^^
SyntaxError: Generator expression must be parenthesized

def foo():
    if pin:
    x = 2
    else:
        x = 100

Output:
  File "C:\Python310\indent.py", line 3
    x = 2
    ^
IndentationError: expected an indented block after 'if' statement on line 2

Advice when error,eg typo ect...

>>> liist('hello')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'liist' is not defined. Did you mean: 'list'?
>>> list('hello')
['h', 'e', 'l', 'l', 'o']

>>> from datetime import date
>>>
>>> data(2020, 5, 17))
  File "<stdin>", line 1
    data(2020, 5, 17))
                     ^
SyntaxError: unmatched ')'
>>> data(2020, 5, 17)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'data' is not defined. Did you mean: 'date'?
>>> date(2020, 5, 17)
datetime.date(2020, 5, 17)

[Yoriz]

YouTube - Python 3.10 Release Stream — with Pablo Galindo