a simple string question

[Steve Holden]

vedrandekovic at v-programs.com wrote:
> On 28 srp, 07:05, Zentrader <zentrad... at gmail.com> wrote:
>>>> vedrandeko... at v-programs.com wrote:
>>>>> NEW TEXT :  "Hello world;\nHello:\n\t\t\n\n\n\n\n\nHello2"
>> If you are doing all of this to format the output into columns,
>> Python's print() or write() will do this, and is easier as well.  Some
>> more info on what you want to do will clear things up.
> 
> Hi,
> 
> That is confusing me too, so now I will try explain it more.This is
> text before "translation":
> Let me explain you with python code. I want to this "function" act
> code indentation
> 
>>>> Short_Text="n=90; if n==90:print 'ok'"
> Then now I must  write that function for detect ";" and ":", and if
> that function detect ";" then it appends "\n" before ";" but
> if detect ":" then it appends "\n\t\t\t\t\t\t\t\t"
>>>> Short_text_after_translation="n=90;\nif n==90:\n\t\t\t\t\t\t\t\tprint 'ok"
> ...And now when we run this code with exec this must look like:
> 
> n=90;
> if n==90:
>        print 'ok'
> 
> I think this will be enough for help.
> 
OK, but you don't want that many tab characters if you can the code to 
look like you show it. It's not, anyway, a good idea to use tabs to 
indent code.

I suspect what you need is to split the code on semicolons first, then 
re-form lines with colons in them. Some simple code to do this would 
look *something* like what follows. This will handle a little more than 
you wanted.

 >>> Short_Text="n=90; if n==90:print 'ok'"
 >>> compound_lines = Short_Text.split(";")
 >>> for line in compound_lines:
...   line = line.replace(":", ":\n    ")
...   print line
...
n=90
  if n==90:
     print 'ok'
 >>>

Note there are issues here that I haven't addressed. The first is that 
leading spaces on the second statement need to be removed, and the 
second is that this only works at the outermost level of indentation. 
For example, if you want to end up translating function definitions with 
if statements inside them correctly you will need to handle multiple 
levels of indentation. There are other problems, like semicolons and 
colons inside string constants should be ignored, but the only way to 
get over those will be to parse the program text according to some 
grammar rather than using ad-hoc methods such as the above.

I hope I have finally been of some assistance ... please reply via the 
newsgroup, not in personal email.

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
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