On Tue, Sep 29, 2009 at 1:20 PM, Hatem Nassrat <hnass...@gmail.com> wrote: > Tue Jul 3 10:14:17 CEST 2007, Guido van Rossum wrote: >> On 6/30/07, Matt Chisholm <matt-python at theory.org> wrote: >> > I've created and submitted a new PEP proposing support for labels in >> > Python's break and continue statements. Georg Brandl has graciously >> > added it to the PEP list as PEP 3136: >> > >> > http://www.python.org/dev/peps/pep-3136/ >> >> I think this is a good summary of various proposals that have been >> floated in the past, plus some new ones. As a PEP, it falls short >> because it doesn't pick a solution but merely offers a large menu of >> possible options. Also, there is nothing about implementation yet. >> >> However, I'm rejecting it on the basis that code so complicated to >> require this feature is very rare. In most cases there are existing >> work-arounds that produce clean code, for example using 'return'. > > I agree that this feature will only serve as a quick hack and in many > cases it would be misused and ugly code will be the result. However, > it seems that there are some shortcuts that have sneaked into python > (I am a fairly new Python programmer, only since late 2.4, so don't > shoot me). The specific one of which I speak about is: > > while_stmt ::= "while" expression ":" suite > ["else" ":" suite] > > for_stmt ::= "for" target_list "in" expression_list ":" suite > ["else" ":" suite] > > try1_stmt ::= "try" ":" suite > ("except" [expression ["as" target]] ":" suite)+ > ["else" ":" suite] > ["finally" ":" suite] > > All these else's seem like shortcuts to me. I did find a use for them, > once I found out they existed, but I get butterflies whenever I do.
In English, butterflies are usually a good thing (they mean you'e in love). These else clauses (assuming you're talking about that) have been in the language pretty much forever. The combined except/finally clause is newer, it was added because Java allows it and it was actually a pretty common usage. -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com