I wrote a small wxPython based app to test code snippets.
(google for "python lightning compiler" if you want to see the full
code).
In the basic mode, I redirect the standard input and output and
execute the code taken from the editor window so that the result
appears in the output window.
Here are the 4 main lines of code to accomplish this:
sys.stdout = self.outputWindow
sys.stderr = self.outputWindow
user_code = self.PythonEditor.GetText()
exec user_code in myGlobals
For example, if I have the following situation:
====input window====
print "Hello world!"
====================
the result of running the program will be this:
====output window===
Hello world!
====================
Simple enough :-) [Actually, there's more to it, but this description
should suffice for illustration purposes.]
Now, I want to be able to test the code using the doctest module.
I can't use exec as doctest.testmod() will be testing my entire
application, not simply the code in the input window!
The solution I chose was to
1. Create a new file which contains the code to be tested with the
appropriate "doctest" call.
2. Run this file with Python, redirecting the result to a second file.
3. Read the result from the second file into a string.
4. Print the string (which, because of redirection) appears in the
output window.
Here are the main lines of code to do this:
sys.stdout = self.outputWindow
sys.stderr = self.outputWindow
user_code = self.PythonEditor.GetText()
user_code += "\nimport doctest\ndoctest.testmod()"
f = open('_doctest_file.py', 'w')
f.write(user_code)
f.close()
if verbose:
os.popen("python _doctest_file.py -v> _doctest_file.output")
else:
os.popen("python _doctest_file.py> _doctest_file.output")
result = open("_doctest_file.output", 'r').read()
print result
######
While this works, I find it "messy", as it creates some intermediate
files. I was wondering if there was a better way to do things all in
memory, in an OS independent way.
[Note that the complete application is approximately 665 lines long
... a bit too much to post all here :-)]
André
--
http://mail.python.org/mailman/listinfo/python-list
