Reduce need of backslash

Bengt Richter bokr at oz.net
Sat Sep 27 17:57:45 CEST 2003


On Fri, 26 Sep 2003 16:33:25 +0200, Peter Otten <__peter__ at web.de> wrote:

>Nicolas Fleury wrote:
>
>> I was wondering if the need for \ could be reduce in the language.  For
>> example, could a line ending with = or + could be automaticly considered
>> incomplete?
>
>Did you know about (...)?
>
>>>> ("alpha"
>... + "beta"
>... + "gamma"
>...
>... )
>'alphabetagamma'
>>>>
>
Did you know the tokenizer concatenates white-space-separated string literals into
a single literal? ;-)

>>> ("alpha"
...  "beta"
...  "gamma"
... )
'alphabetagamma'

Note the effect in code:

 >>> import dis
 >>> f1 = lambda: ("alpha"
 ...              + "beta"
 ...              + "gamma"
 ...              )
 >>> f2 = lambda: ("alpha"
 ...                "beta"
 ...                "gamma"
 ...              )
 >>> dis.dis(f1)
   1           0 LOAD_CONST               1 ('alpha')
               3 LOAD_CONST               2 ('beta')
               6 BINARY_ADD
               7 LOAD_CONST               3 ('gamma')
              10 BINARY_ADD
              11 RETURN_VALUE
 >>> dis.dis(f2)
   1           0 LOAD_CONST               1 ('alphabetagamma')
               3 RETURN_VALUE

Regards,
Bengt Richter




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