[docs] Section 5 of Python 2.7.16 documentation errors

[Julien Palard]

Hi Bud!

Thanks for taking the time to report issues, it's appreciated!


> Most notable, section 5. Expressions
>
> def f(a,b):
>
>     print a,b  # raises an error and should read print(a,b)

Your mail subject indicates you found those errors in the Python 2.7 documentation, but it looks like you're trying with a Python 3.

print a, b is a Python 2 syntax, and print(a, b) is a Python 3 syntax, there's a whole lot of changes that happened between Python 2 and Python 3 ten years ago, you probably want to focus on Python 3 noadays, while reading the Python 3 documentation.

> Section 5.4  Raising a negative number to a fractional power does not
> return an error as stated in the documentation but appears to
> functioning correctly.

Again, you may have tried with a Python 3:

# Python 2.7.16

>>> (-1) ** .5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: negative number cannot be raised to a fractional power

# Python 3.7.2

>>> (-1) ** .5
(6.123233995736766e-17+1j)


> Section 5.9  <> returns a syntax error and is no longer usable to replace !=

# Python 2.7.16

>>> 1 <> 2
True

# Python 3.7.2

>>> 1 <> 2
  File "<stdin>", line 1
    1 <> 2
       ^
SyntaxError: invalid syntax

Bests,
-- 
Julien Palard
https://mdk.fr