🥇 Release of Python 3.8

Most interesting innovations:

Assignment expression:
The new operator := allows assignment of values to variables within expressions. For example:
if (n := len(a)) > 10:
print(f"List is too long ({n} elements, expected <= 10)")
Positional-only arguments:
It's now possible to specify which function parameters can be passed using named argument syntax and which cannot. Example:
def f(a, b, \/, c, d, *, e, f):
print(a, b, c, d, e, f)

f(10, 20, 30, d=40, e=50, f=60) # OK
f(10, b=20, c=30, d=40, e=50, f=60) # error, `b` cannot be a named argument
f(10, 20, 30, 40, 50, f=60) # error, `e` must be a named argument
This change gives developers a way to protect users of their APIs from changes in function argument names.
Support for f-strings = for self-documenting expressions and debugging:
Sugar added for simplifying debugging/logging messages.
n = 42
print(f'Hello world {n=}.')
# напечатает "Hello world n=42."
Fixed the continue keyword in the finally block (it didn't work before).

Miscellaneous:

You can explicitly specify the path to the bytecode cache instead of the default __pycache__.
Debug and Release builds use the same ABI.