[Python-ideas] Implicit string literal concatenation considered harmful?

[M.-A. Lemburg]

On 11.05.2013 19:05, Christian Tismer wrote:
> I think a simple stripping of white-space in
> 
>     text = s"""
>       leftmost column
>         two-char indent
>       """
> 
> would solve 95 % of common indentation and concatenation cases.
> I don't think provision for merging is needed very often.
> If text occurs deeply nested in code, then it is also quite likely to
> be part of an expression, anyway.
> My major use-case is text constants in a class or function that
> is multiple lines long and should be statically ready to use without
> calling a function.
> 
> (here an 's' as a strip prefix, but I'm not sold on that)

This is not a good solution for long lines where you don't want to
have embedded line endings. Taken from existing code:

_litmonth = ('(?P<litmonth>'
             'jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|'
             'mär|mae|mrz|mai|okt|dez|'
             'fev|avr|juin|juil|aou|aoû|déc|'
             'ene|abr|ago|dic|'
             'out'
             ')[a-z,\.;]*')

or
                    raise errors.DataError(
                        'Inconsistent revenue item currency: '
                        'transaction=%r; transaction_position=%r' %
                        (transaction, transaction_position))

We usually try to keep the code line length under 80 chars,
so splitting literals in that way is rather common, esp. in
nested code paths.

-- 
Marc-Andre Lemburg
eGenix.com

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