[Python-ideas] Add 'use warnings' directive, like in Perl

[Terry Reedy]

On 2/10/2015 11:04 AM, Eduard Bondarenko wrote:

> Actually, this is my first experience for writing into the community
> like this, so excuse me if you found some mistakes or oddities.

Code should be plain plain-text, without markup such as *s around 
identifiers.

> #!/usr/bin/python
>
> *word* = raw_input("Enter line : ")
>
> if *word* == "hello":
>    print ("You wrote \'hello\'")
> else:
>    if *world* == "buy": #Error! should be word not world
>      print "Buy"

elif world == "buy": #Error! should be word not world

> else:
> *iamnotfunction* #Also error
>
> This script contains two errors. And in both cases we will know about it
> at runtime. And the most worst thing is that you will not know about
> these errors until someone enters anything other than the "hello" word..

The test suite should test each branch each way.
https://pypi.python.org/pypi/coverage/3.7.1
makes this easy.

-- 
Terry Jan Reedy