[Python-Dev] Default formatting

[Serhiy Storchaka]

On 27.10.16 02:44, Eric V. Smith wrote:
> But on the other hand, the existing behavior is well specified and has
> been around since object.__format__ was added. I'm not sure it needs
> changing. What's the harm in leaving it?

More complicated code. And maybe this behavior is less intuitive. It 
contradicts the documentation.

 From the documentation of the format() builtin [1]:

"The default format_spec is an empty string which usually gives the same 
effect as calling str(value)."

 From the description of the format specification mini-language [2]:

"A general convention is that an empty format string ("") produces the 
same result as if you had called str() on the value."

[1] https://docs.python.org/3/library/functions.html#format
[2] https://docs.python.org/3/library/stdtypes.html#str.format