[Python-Dev] PEP 3101: Advanced String Formatting

[Aahz]

First of all, I recommend that you post this to comp.lang.python.  This
is the kind of PEP where wide community involvement is essential to
success; be prepared for massive revision.  (My point about massive
revision would be true regardless of how much consensus has been reached
on python-dev -- PEPs often change radically once they're thrown into
the wild.)

On Sat, Apr 29, 2006, Talin wrote:
>
>      Braces can be escaped using a backslash:
> 
>          "My name is {0} :-\{\}".format('Fred')

You should include somewhere reasoning for using "\{" and "\}" instead
of "{{" and "}}".

>      Simple names are either names or numbers.  If numbers, they must
>      be valid decimal numbers; if names, they must be valid Python
>      identifiers.  A number is used to identify a positional argument,
>      while a name is used to identify a keyword argument.

s/decimal numbers/decimal integers/ (or possibly "base-10 integers" for
absolute clarity)

>      The parameters to the cformat function are:
> 
>          -- The format string (or unicode; the same function handles
>             both.)
>          -- A field format hook (see below)
>          -- A tuple containing the positional arguments
>          -- A dict containing the keyword arguments
> 
>      The cformat function will parse all of the fields in the format
>      string, and return a new string (or unicode) with all of the
>      fields replaced with their formatted values.
> 
>      For each field, the cformat function will attempt to call the
>      field format hook with the following arguments:
> 
>         field_hook(value, conversion, buffer)

You need to explain further what a field format hook is and how one
specifies it.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Argue for your limitations, and sure enough they're yours."  --Richard Bach