Python is DOOMED! Again!

Thu Jan 22 23:51:28 EST 2015

Sturla Molden wrote:
> Chris Angelico <rosuav at gmail.com> wrote:
>>> Uhh... if your managers and customers are stipulating non-Pythonic
>> coding styles, then it's time to find new managers/customers. If
>> they're not writing the code, code quality shouldn't be their concern.
>> I am saying the day someone requires me to write a type hint, I will no
> longer be using Python or recommending it. Python is great, but not that
> great.

You probably already write type checks, only you might do it like this:
def my_func(x, index=0):
 if not isinstance(index, int):
 raise TypeError("index must be an integer")
 do_stuff()
or perhaps like this:
def my_func(x, index=0):
 try:
 if index == int(index):
 do_stuff()
 except TypeError:
 raise
 else:
 raise TypeError("index must be an integer, not a float")
And then you write tests to confirm that my_func fails correctly when given
an index which is not an integer. Most of that is monkey-work, so simple
that even the compiler can do it.
How about writing this instead?
def my_func(x, index:int=0): 
 do_stuff()
Is that really such an unspeakable burden? *Always* a burden? You cannot
imagine any circumstances where you would gain some advantage by having an
automated type-checker identify type-related bugs?
Well okay then. Keep working the way you do right now.
-- 
Steven