Re: Two questions
- From: Joal Heagney <jhe13586@xxxxxxxxxxxxxx>
- Date: Thu, 02 Jun 2005 14:06:58 GMT
qscomputing@xxxxxxxxx wrote:
Hi,
I've developed in several other languages and have recently found Python and I'm trying to use it in the shape of the PythonCard application development tool.
My two questions:
1. What is the easiest way to create a for loop in the style I'm used to from Delphi ie: for I:=0 to 2 do begin //code end;
Um, assuming that this loops through the numbers 0 to 2 and assigns them to the variable I, and then does something in code with I after it's been assigned, the python equivalent is:
for I in range(0,3): //code
(Note the whitespace after opening the for loop?)
And then break the indenting to finish the for loop. So you're next piece of code (Whatever you had after end;) would go here:
//morecode.
2. Philospohy(sp?) aside, I could potentially want to create a binary-only distribution of my finished apps. I noticed the documentation on .pyc files: how do I create these and, aside from being basically read-only, are they used just like ordinary .py source files? And can they be easily reverse-engineered?
As long as you have write access to the directory that you're .py files are in, when you run python, it will generate the .pyc files for you as they are loaded.
There is also a utility script in the main distribution called py_compile.py.
E.g. compiling a whole directory of .py files:
python /path/to/main/install/py_compile.py *.py
And to compile them as optimised binary files (.pyo): python -O /path/to/main/install/py_compile.py *.py
They are used like ordinary .py source files. (Python actually executes from the .pyc files it builds from your .py files.)
They can be reverse-engineered, but then so can Java/C++/Assembler. Have a look through the group for something about being able to distribute your modules.pyc as a zipfile - I remember something about being able to do a -tiny- bit of extra protection by having them as a passworded zip file.
Thanks, - QS Computing.
Welcome.
Joal .
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