On 8/11/2019 4:18 PM, Glenn Linderman wrote:
On 8/11/2019 2:50 AM, Steven D'Aprano wrote:
On Sat, Aug 10, 2019 at 12:10:55PM -0700, Glenn Linderman wrote:
Or invent "really raw" in some spelling, such as rr"c:\directory\"
or e for exact, or x for exact, or <your favorite character
here>"c:\directory\"
And that brings me to the thought that if \e wants to become an
escape for escape, that maybe there should be an "extended escape"
prefix... if you want to use more escapes, define ee"string where \\
can only be used as an escape or escaped character, \e means the ASCII
escape character, and \ followed by a character with no escape
definition would be an error."
Please no.
We already have b-strings, r-strings, u-strings, f-strings, br-strings,
rb-strings, fr-strings, rf-strings, each of which comes in four
varieties (single quote, double quote, triple single quote and triple
double quote). Now you're talking about adding rr-strings, v-strings
(Greg suggested that) and ee-strings, presumably some or all of which
will need b*- and *b- or f*- and *f- varieties too.
Don't forget the upper & lower case varieties :)
And all orders!
>>> _all_string_prefixes()
{'', 'b', 'BR', 'bR', 'B', 'rb', 'F', 'RF', 'rB', 'FR', 'Rf', 'Fr',
'RB', 'f', 'r', 'rf', 'rF', 'R', 'u', 'fR', 'U', 'Br', 'Rb', 'fr', 'br'}
>>> len(_all_string_prefixes())
25
And if you add just 'bv' and 'fv', it's 41:
{'', 'fr', 'Bv', 'BR', 'F', 'rb', 'Fv', 'VB', 'vb', 'vF', 'br', 'FV',
'vf', 'FR', 'fV', 'bV', 'Br', 'Vb', 'Rb', 'RF', 'bR', 'r', 'R', 'Vf',
'fv', 'U', 'RB', 'B', 'rB', 'vB', 'Fr', 'rF', 'fR', 'Rf', 'BV', 'VF',
'bv', 'b', 'u', 'f', 'rf'}
There would be no need for 'uv' (not needed for backward compatibility)
or 'rv' (can't be both raw and verbatim).
I'm not in any way serious about this. I just want people to realize how
many wacky combinations there would be. And heaven forbid we ever add
some combination of 3 characters. If 'rfv' were actually also valid, you
get to 89:
{'', 'br', 'vb', 'fR', 'F', 'rFV', 'fRv', 'fV', 'rVF', 'Rfv', 'u',
'vRf', 'fVR', 'rfV', 'Fvr', 'vrf', 'fVr', 'vB', 'Vb', 'Rvf', 'Fv', 'Fr',
'FVr', 'B', 'rVf', 'FVR', 'vfr', 'VB', 'VrF', 'BR', 'VRf', 'vfR', 'FR',
'Br', 'RFV', 'Rf', 'fvR', 'f', 'rb', 'VfR', 'VFR', 'fr', 'vFR', 'VRF',
'frV', 'bR', 'b', 'FrV', 'r', 'R', 'RVF', 'FV', 'rvF', 'FRV', 'Vrf',
'rvf', 'FRv', 'Frv', 'vF', 'bV', 'VF', 'fv', 'RF', 'RB', 'rB', 'vRF',
'RFv', 'RVf', 'Rb', 'Vfr', 'vrF', 'rf', 'Bv', 'vf', 'rF', 'U', 'bv',
'FvR', 'RfV', 'Vf', 'VFr', 'vFr', 'fvr', 'BV', 'rFv', 'rfv', 'fRV',
'frv', 'RvF'}
If only we could deprecate upper case prefixes!
Eric
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