Re: [Tutor] Runing a Python program
There's a simple way you can add your directory to the execution path. try this >>> sys.path.append(r'C:\python24\myPythonFiles') now, you can import your file with the import command >>> import yourFile Note: This is only a temporary solution, when you close the interpreter, it will need to be appended again. Hope that help. - Original Message - From: Henry Dominik To: Tutor Sent: Friday, May 12, 2006 9:24 PM Subject: [Tutor] Runing a Python program Hello people, As a new python programmer, I created a directory in 'C:\python24\myPythonFiles', and added a simple python under the myPythonFiles directory; but when I tried running it on the Python Shell, I got the following error. >>> import myPythonFiles.readOut Traceback (most recent call last): File "", line 1, in -toplevel- import mypythonFiles.readOut ImportError: No module named myPythonFiles.readOut >>> How do I run a program that is placed on its own folder/directory? Thanks Henry ___Tutor maillist - Tutor@python.orghttp://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Runing a Python program
Henry Dominik wrote: > Hello people, > > As a new python programmer, I created a directory in > 'C:\python24\myPythonFiles', > and added a simple python under the myPythonFiles directory; but when I > tried running it on the Python Shell, I got the following error. > > >>> import myPythonFiles.readOut To be able to import a module, the directory containing the module must be in sys.path. sys.path is just a list of directory paths. The Python runtime searches each of these directories for your module. So one thing you can do is make sure your module is in a directory that is in sys.path. A couple of possibilities are the current working directory and the site-packages directory. On my computer (Win2K) Python puts the current working directory in sys.path. (I'm not sure this happens on Linux.) You can see this if you print sys.path; it is the empty string that starts the list. So I often cd to the directory containing a program before starting Python. Then I can import modules from that directory. For modules you want to be able to use from several programs, you can put them in C:\Python24\Lib\site-packages. This directory is always added to sys.path and it is intended as a place to install extra modules and packages. Most third-party modules will install to site-packages. Alternately you can modify sys.path to include the dir you want. There are several ways to do this. One way, as Evans showed, is to change it at runtime by appending a new path. This is fine for temporary changes but not very convenient in the long run. Another possibility is to edit the environment variable PYTHONPATH and add your dir to it. You can also create a .pth file in site-packages that contains the path to the dir to add to sys.path. You can find more info here: http://docs.python.org/tut/node8.html#SECTION00811 http://docs.python.org/lib/module-site.html Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Runing a Python program
Hi Henry,
> As a new python programmer, I created a directory in
> 'C:\python24\myPythonFiles', and added a simple python
> under the myPythonFiles directory; but when I tried
> running it on the Python Shell, I got the following error.
>
>>> import myPythonFiles.readOut
> ImportError: No module named myPythonFiles.readOut
Ok, the first thing to say is that you are not running the
program but importing it, there is a difference.
To run a Python program in Windows either double click it
in Windows Explorer (it should have a snake icon to show
that the association is set up correctly) or at a DOS
command prompt (or the Start->Run dialog) type
C:\> python C:\python24\myPythonFiles\readOut.py
In either case you may find the program runs so fast you
can't see the output. In that case add a final line like:
raw_input("Hit ENTER to quit")
When you import a module it does indeed execute
the code in that module and so might appear to run
the program, but there is one important distinction
(which you may not have come across yet!) You can
put a clause into the module like:
if __name__ == "__main__":
# some code here
and the code under the if will only be executed when the
file is run as a program, it will NOT be executed when
the file is imported as a module. (This is a powerful feature
that greatly eases the task of writing reusable code
in Python.)
Now the second thing to note is that your import syntax
is wrong.
To make the files in your directory visible toi the import
command you need to modify the value in sys.path.
There are a number of ways to do this, the one that I
use is to create a PYTHONPATH environment variable
(MyComputer->Properties->Advanced->Environment Variables)
which points to all the folders where I keep Python code,
in the same way that the DOS PATH variable points to
my executable files.
HTH,
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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[Tutor] Database topic now fixed
The mistakes in my databae topic have now been rectified. I have no idea how I managed to post the file without testing that section of code. And unfortunately it's one of the areas where SqlLite SQL syntax varies from the Oracle syntax that I'm most familiar with. But that's only a partial excuse since my code wasn't actually valid Oracle code either, it was just wrong! Hopefully all errors are now removed apologies once again, Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Runing a Python program
> On my computer (Win2K) Python puts the current working directory in > sys.path. (I'm not sure this happens on Linux.) yes it does, on any unix-flavored system (Linux, FreeBSD, MacOS X, Solaris, etc.). since we're on the topic, there is another attribute in the sys module, sys.modules that shows you all the imported (and loaded) modules and where they live in the filesystem. it's a good way to figure out path problems too. hope this helps! -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Core Python Programming", Prentice Hall, (c)2007,2001 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Database topic now fixed
Alan Gauld wrote: > The mistakes in my databae topic have now been rectified. > I have no idea how I managed to post the file without testing > that section of code. And unfortunately it's one of the areas > where SqlLite SQL syntax varies from the Oracle syntax that > I'm most familiar with. But that's only a partial excuse since > my code wasn't actually valid Oracle code either, it was just > wrong! > > Hopefully all errors are now removed This is my first reading of that topic. Thank you for all the effort you put into this, as well as your willingness to admit and fix problems. If only Microsoft had that attitude. Some observations: 1 - people familiar with other databases might be puzzled by the lack of column datatypes. I'd mention that sqlite allows but does not require types at the first introduction of CREATE TABLE,. 2 - The introduction of NULL: "NOT NULL is self explanatory, it indicates that the value must exist and not be NULL." To someone completely new to SQL this is IMHO not self explanatory. This is the first appearance of "NULL" in the tutorial, and I deem a little explanation would help. Perhaps a definition of NULL then an INSERT statement that does not cover all columns, showing what happens when a NULL column is omitted and then the result of a SELECT, then showing what happens when a NOT NULL column is omitted (Error). 3 - "UNIQUE means that the value must be unique within the table. If it is not, an error results and the row will not be inserted." This is slightly confusing (and not totally true "unique within the table" really is within the column). I'd reword it something like "an insert statement that would put a value in a unique column that is already in that column will raise an error and not insert a row" 4 - introducing WHERE. I'd first show it as WHERE x = y and then introduce the table prefix. 5 - following the explanation of UNIQUE under constraints, please also explain DEFAULT. 6- the table structure in Address Book Revised looks like it is for UK addresses. Consider saying this. Also consider a structure that would accommodate US/Canadian address also. 7 - "SELECT First,Last, Phone FROM Address WHERE First Like Dav%;" Shouldn't Dav% be in quotes? HTH ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Database topic now fixed
Thanks Bob, Feedback is always appreciated, its how the tutor improves. > 1 - people familiar with other databases might be puzzled by the > lack of column datatypes. I'd mention that sqlite allows but does > not require types at the first introduction of CREATE TABLE,. Fair point, although by definition my tutor is aimed at absolute novices so they are less likely to know about SQL. But I will make a comment. > 2 - The introduction of NULL: "NOT NULL is self explanatory, it > indicates that the value must exist and not be NULL." Oops, self referencing definitions are never good (unless its GNU) I'll fix that one. > > 3 - "UNIQUE means that the value must be unique within the table. > > If it > slightly confusing (and not totally true "unique within the table" > really is within the column). Quite right, I'll clarify it. > 4 - introducing WHERE. I'd first show it as WHERE x = y and then > introduce the table prefix. My general style in the tutor is to teach the most general case first then introduce the shortcuts. Fully specified names will never go wrong but shortened names can cause confusion in my experience. So for this one I'lll stick with the long way first then introduce the shoirter form. > 5 - following the explanation of UNIQUE under constraints, please > also explain DEFAULT. Fair point. > 6- the table structure in Address Book Revised looks like it is for > UK addresses. Consider saying this. Also consider a structure that > would accommodate US/Canadian address also. Erm, What is the difference exactly? > 7 - "SELECT First,Last, Phone FROM Address WHERE First Like Dav%;" > Shouldn't Dav% be in quotes? Oops yes, it is in my actual code but they have been dropped in the editing somewhere. Oh well, not quite as faultless as I hoped but better than it was! :-) Thanks for the feedback Bob, I'll incorporate most of it in the next upload. Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Spanish Tutorials
Hello! At my university we are creating a Wiki with information about the careers and articles, one of the most important section is the Systems Engineering, which sports a Python section :) Spanish Python Tutorials at: http://wikitec.itnogales.edu.mx/index.php/Python Saludos! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Problems with Treeview
Hi,
I am having problems selecting a row in treeview.
I am using Pythoncard,
Glade 2 and Python 2.4.
I am using the following code:-
combo3 = self.wTree.get_widget("treeview1")
model=gtk.TreeStore(gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING,gobject.TYPE_STRING)
self.hostsmodel = model
combo3.set_model(model)
combo3.connect("row_activated", self.callback53, combo3,model)
def
callback53(self,data,combo3,data2,data3,model):
view = gtk.TreeView(model)
selection = view.get_selection().get_selected()
print selection
result = model.get_value(iter,0)
print result
I get the following error:
(, None)
Traceback (most
recent call last):
File
"C:\Documents and Settings\Johnc\Projects\project7\shopcall.py", line
1
, in callback53
result = model.get_value(iter,0)
TypeError: iter must be a GtkTreeIter
What do I need to assign to iter
to make this code work?
Thanks,
John.
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[Tutor] How do I create the equivalent of a Java class in Python?
Hey all, How do I create the equivalent of a Java class in Python? I've been looking at the reference, and it's been confusing to me at least. Thanks, Nathan Pinno ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Database topic now fixed
> Some observations: These have now all been addressed as previously discussed. I've also added a section at the end covering the use of execute() to insert parameters rather than relying on format strings since the latter can be a security risk. Hopefully its now complete! :-) Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How do I create the equivalent of a Java class in Python?
> How do I create the equivalent of a Java class in Python? I've been looking > at the reference, and it's been confusing to me at least. can you clarify what you are looking for? do you want to create a class using Python, create the equivalent of a Java class using Python via Jython, accessing a preexisting Java class from Python, or what? you cannot simply write Java code in Python, but Python classes do get turned into Java classes under the covers. also, what is confusing you in the documentation? can you send a pointer to it? thanks, -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Core Python Programming", Prentice Hall, (c)2007,2001 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How do I create the equivalent of a Java class in Python?
> How do I create the equivalent of a Java class in Python? I've been > looking at the reference, and it's been confusing to me at least. You may want to look at a tutorial on classes, like: http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm Does this help? Best of wishes! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
