Using something other than ';' to separate statements
I know I've seen this somewhere, but can't seem to google it. Is there a way to use an alternate statement separator, other than the default ';'? jw -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Jaime Wyant [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I know I've seen this somewhere, but can't seem to google it. Is there a way to use an alternate statement separator, other than the default ';'? Other than \n, no. Both are builtin to the language definition and interpreter. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Jaime Wyant wrote: I know I've seen this somewhere, but can't seem to google it. Is there a way to use an alternate statement separator, other than the default ';'? The validity of Terry's answer (which is true for the general case) aside, it might be possible to do what you are trying to do if you could explain what it is you are really trying to accomplish, rather than just asking about how you think you should accomplish it... (Ideas involving string.replace and exec come to mind, but it's impossible to say whether that might work in your context until you provide more background.) -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Well, I'm embedding python in an old C console app. This app uses a lot of ; delimited records. I want to allow the execution of arbitrary python statements inside some of these records. I was hoping there was an easy way to set the statement terminator. I will simply make up a new terminator and do some string substitution to turn my new terminator into python's ';'. Thanks ya'll, jw On Wed, 30 Mar 2005 11:58:42 -0500, Peter Hansen [EMAIL PROTECTED] wrote: Jaime Wyant wrote: I know I've seen this somewhere, but can't seem to google it. Is there a way to use an alternate statement separator, other than the default ';'? The validity of Terry's answer (which is true for the general case) aside, it might be possible to do what you are trying to do if you could explain what it is you are really trying to accomplish, rather than just asking about how you think you should accomplish it... (Ideas involving string.replace and exec come to mind, but it's impossible to say whether that might work in your context until you provide more background.) -Peter -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Jaime Wyant wrote: Well, I'm embedding python in an old C console app. This app uses a lot of ; delimited records. I want to allow the execution of arbitrary python statements inside some of these records. I was hoping there was an easy way to set the statement terminator. I will simply make up a new terminator and do some string substitution to turn my new terminator into python's ';'. You refer to it here as a statement terminator, but in the first posting you called it a statement separator. I believe it is just a separator, not a terminator, and as such is not even required unless you need/want to have two statements on the same line. In all the tens of thousands of lines of Python code I've written, I don't believe I've ever used a single semicolon to separate two statements. Perhaps you don't need them either... -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Jaime Wyant wrote: [snip] After goofing around with this idea, I've realized you can't be very expressive with a bunch of python statements strung together. My biggest problem is that I can't figure out (i don't think you can), how to do conditionals that are strung together: # This won't work if a 5: print a 5;else print Doh I've decided to just call a function from the semicolon delimited record, using the return value in my `C' app... The following might work based on the context: code = '''if a 5: \nprint a 5\nelse:\nprint Doh\n''' or, formatted differently code = ''' if a 5: print a 5 else: print Doh ''' Then, you could do exec(code) Yeah, I tried to make it work, but it just won't. At least not in a satisfactory way. Thanks! jw André -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
On Wed, 30 Mar 2005 14:26:20 -0500, Peter Hansen [EMAIL PROTECTED] wrote: Jaime Wyant wrote: Well, I'm embedding python in an old C console app. This app uses a lot of ; delimited records. I want to allow the execution of arbitrary python statements inside some of these records. I was hoping there was an easy way to set the statement terminator. I will simply make up a new terminator and do some string substitution to turn my new terminator into python's ';'. You refer to it here as a statement terminator, but in the first posting you called it a statement separator. I believe it is just a separator, not a terminator, and as such is not even required unless you need/want to have two statements on the same line. Yeah, my thinking was that a separator implied terminator, because to separate something has to have a beginning / ending. Sorry for the inconsistency. Anyway, I did want to be able to string a handful of statements together in one string. The python statements were one of the semicolon delimited fields I'm working with -- which is where my problem lied. After goofing around with this idea, I've realized you can't be very expressive with a bunch of python statements strung together. My biggest problem is that I can't figure out (i don't think you can), how to do conditionals that are strung together: # This won't work if a 5: print a 5;else print Doh I've decided to just call a function from the semicolon delimited record, using the return value in my `C' app... In all the tens of thousands of lines of Python code I've written, I don't believe I've ever used a single semicolon to separate two statements. Perhaps you don't need them either... Yeah, I tried to make it work, but it just won't. At least not in a satisfactory way. Thanks! jw -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Jaime Wyant wrote: # This won't work if a 5: print a 5;else print Doh This will: [Doh, a 5][a 5] I highly discourage using it though--it's somewhat obtuse. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Michael Hoffman wrote: Jaime Wyant wrote: # This won't work if a 5: print a 5;else print Doh This will: [Doh, a 5][a 5] I highly discourage using it though--it's somewhat obtuse. It's also limited to evaluating expressions, which is probably not very useful to the OP... -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Hi All-- Michael Hoffman wrote: Jaime Wyant wrote: # This won't work if a 5: print a 5;else print Doh This will: [Doh, a 5][a 5] I highly discourage using it though--it's somewhat obtuse. Bad Michael. Bad, bad Michael. Metta, Ivan -- Ivan Van Laningham God N Locomotive Works http://www.andi-holmes.com/ http://www.foretec.com/python/workshops/1998-11/proceedings.html Army Signal Corps: Cu Chi, Class of '70 Author: Teach Yourself Python in 24 Hours -- http://mail.python.org/mailman/listinfo/python-list
Re: Using something other than ';' to separate statements
Ivan Van Laningham wrote: Bad Michael. Bad, bad Michael. :( Well personally I consider it better to tell people of hacks like that with a warning not to use them than let them discover them on their own (without such a warning). Plus dubious Python hacks that should never be used in production code are fun, which is what c.l.p. is all about! -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
