On 1/5/2014 3:24 PM, Göktuğ Kayaalp wrote:
Hi,

AFAIK, we do not have "postfix conditionals" in Python, i.e. a condition
appended to a
statement, which determines whether the statement runs or not:

   py> for i in [False]:
   ...     break if not i

The above piece of code is equivalent to this in Python:

   py> for i in [False]:
   ...    if not i
   ...        break

I believe that the first example is superior to the second example when
the two is compared
for readability and intuitiveness.  We already have a ternary statement

'conditional expression', which happens to be a ternary as opposed to binary expression.

that looks similar,

   py> print('hi') if True else None

so I reckon there would be no breakage in old code if this kind of
syntax was added.  Ruby has
this, and AFAIK Perl also does.

I lack the knowledge of whether the community has opinions on this kind
of notation,

In general, negative on pure duplication. Guido has said he strongly dislikes the perl reverse if.

--
Terry Jan Reedy


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