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What's New Python 3.8 (2019)

#whatsnewpython3 #python #RaymondHettinger Python 3.8 New Features 2019 1) Installation of Python 3.8 discussed at 0:30 2) Creating virtual environment discussed at 3:34 3) f-strings now support “=” discussed at 4:55 For Understanding of f-string & string formatting in python.You can refer    • Interview Prep Python Part-48 | F-Str...   4) "continue" in finally discussed at 7:45 5) iterable unpacking for return and yield discussed at 8:55 6) reversed() now works with dict discussed at 10:40 7) New syntax warning discussed at 12:43 8) Walrus operator discussed at 13:46 9) Positional-only arguments discussed at 15:48 The walrus operator Assignment expressions have come to Python with the “walrus” operator :=. This will enable you to assign values to a variable as part of an expression. The major benefit of this is it saves you some lines of code when you want to use, say, the value of an expression in a subsequent condition Positional-only arguments A special marker, /, can now be used when defining a method’s arguments to specify that the functional only accepts positional arguments on the left of the marker. f-strings now support “=” The = specifier, used as f'{expr=}' expands to the text of the expression, an equal sign, then the repr of the evaluated expression. reversed() now works with dict The reversed() built-in can now be used to access the dictionary in the reverse order of insertion Simplified iterable unpacking for return and yield This unintentional behavior has existed since Python 3.2 which disallowed unpacking iterables without parentheses in return and yield statements. New syntax warnings The Python interpreter now throws a Syntax Warning in some cases when a comma is missed before tuple or list. So when you accidentally do this a warning will be raised instead of Error and exception ~-~~-~~~-~~-~ Please watch: "LRU Cache (With Python Code) "    • LRU Cache Implementation (With Python...   ~-~~-~~~-~~-~