🌐 Mailman 3 July 2007 - Python-list - python.org

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Aug. 1, 2007

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2 1

simple string backspace question
by vedrandekovic＠v-programs.com July 31, 2007

July 31, 2007

Hello, I have one simple string, backspace character question.Here is my example: >>> text="Hello\bworld" >>> print text "HelloBSworld" Should this character "\b" (backspace) in this text return this: "Helloworld"? Regards, Vedran

6 9

Reload after an exception, not possible ?
by Stef Mientki July 31, 2007

July 31, 2007

hello, I've a graphical application (wxPython), where the code in the main GUI loop is given below. 1 JAL_Loaded = False 2 while len(App_Running) > 0: 3 if JALsPy_globals.State == SS_Run: 4 try: 5 if JAL_Loaded: 6 reload ( JAL_simulation_file ) 7 else: 8 JAL_Loaded = True 9 import JAL_simulation_file 10 except JALsPy_globals.Reload_Exception: 11 JALsPy_globals.State = SS_Halt The first time the while loop is entered, JAL_Loaded is False (line 1), and when I press some button, the code will enter at line 8, importing a module, that has executable code with an infinite loop. To exit this infinite loop, an exception is generated (by a button press), and program comes back in the above while-loop line (10,11,2). So far so good. Then I change the code in the imported file, and when I start the engine again, the flag JAL_Loaded is True, so I don't import, but I reload the file. Now I get the next exception UnboundLocalError: local variable 'JAL_simulation_file' referenced before assignment So obviously I can't reload but have to do an import again (which makes the code much simpler ;-) but I don't understand why the reload raises an exception ???? please enlighten me, thanks, Stef Mientki

2 2

Iteration over strings
by Robert Dailey July 31, 2007

July 31, 2007

Hi, I have the following code: str = "C:/somepath/folder/file.txt" for char in str: if char == "\\": char = "/" The above doesn't modify the variable 'str' directly. I'm still pretty new to Python so if someone could explain to me why this isn't working and what I can do to achieve the same effect I would greatly appreciate it.

6 13

TypeError: unsupported operand type(s) for -: 'Decimal' and 'Decimal'. Why?
by Gilbert Fine July 31, 2007

July 31, 2007

This is a very strange exception raised from somewhere in our program. I have no idea how this happen. And don't know how to reproduce. It just occurs from time to time. Can anyone give me some suggestion to fix this? Thanks. -- Gilbert

6 7

Utilizing a raw IDispatch Pointer from Python
by Brad Johnson July 31, 2007

July 31, 2007

I have a C++ application that creates a collection of COM objects. I would like to give the Python interpreter access to these interfaces that were created in C++ land. Stated another way, how can I have Python consume a IDispatch pointer from C++ and wrap it with one of those nice Python classes automatically? Thanks in advance.

2 1

Re: Process Control Help
by Paul Rubin July 31, 2007

July 31, 2007

Walt Leipold <leipold(a)ace-net.com> writes: > The first time you see twenty tons of machinery move > unexpectedly because you inadvertently changed one bit in memory, you > become very conservative about your software platform. +1 QOTW

1 0

Re: (May be OT) developing in jython, using in java?
by Diez B. Roggisch July 31, 2007

July 31, 2007

Gerardo Herzig schrieb: > Hi all. I dont know if this is the right place for asking this, but > maybe some of you know where i must go. > The thing is: > > Im writing a very simple class (in python) to access some LDAP server. A > companion will access to the same LDAP server too, but his developing in > java. So i said "ok, wait, i dont think we have to make the exact same > thing twice! Let me see if jython can help us"....I can find (after a > quick review) an answer to this: "Can i, using jython, make a package so > my companion can import that package as a webservice??" > > As im farly new in python, *very* new at Java, and *even newer* at > jython, my brain just said to me "ok, i dont know, i want a beer", so > maybe some of you can gide me to where i must go in order to clarify my > ideas. There is a jython mailing list, which is probably a better place to ask jython-related questions. The problem is that jython essentially brings the syntax of python to the library of Java, plus it tries to wrap as much Python libs using the corresponding Java-libs. But there are gaping holes in that effort due to lacks of the JDK - think of e.g. posix functionalities. And while accessing Java from Jython is a piece of cake, the other way round isn't so easy. For you actual problem I'd say: it's the wrong way - because if you need your LDAP-class from CPython, you won't be able to help the Java-guy, because the libraries for accessing LDAP in Java differ from the one in CPython, and making the Jython class accessible from Java isn't worth the effort. diez

1 0

With Statement Contexts and Context Managers
by G July 31, 2007

July 31, 2007

Hi, Could somebody please point me to a good resource to read about the contexts, context managers, and with_statement Best Rgd, G.

2 2

(May be OT) developing in jython, using in java?
by Gerardo Herzig July 31, 2007

July 31, 2007

Hi all. I dont know if this is the right place for asking this, but maybe some of you know where i must go. The thing is: Im writing a very simple class (in python) to access some LDAP server. A companion will access to the same LDAP server too, but his developing in java. So i said "ok, wait, i dont think we have to make the exact same thing twice! Let me see if jython can help us"....I can find (after a quick review) an answer to this: "Can i, using jython, make a package so my companion can import that package as a webservice??" As im farly new in python, *very* new at Java, and *even newer* at jython, my brain just said to me "ok, i dont know, i want a beer", so maybe some of you can gide me to where i must go in order to clarify my ideas. Thanks!!! Gerardo

1 0