Re: [Tutor] Looking for a tutor to review my code and provideconstructive feedback.
Glen Clark gle...@gmail.com wrote in message
news:aanlktimabbj8ae35q3ao9+xzbvtnyzbz3wrudahmn...@mail.gmail.com...
Hello,
I have completed my first python script. This is after watching a video
guide on python and is my first attempt at writing code in python. While
the
code is not very useful I got the idea for it when googling python
projects
for beginners.
The idea was to create a script that asked the user to input a list of
names
and allow the user to change a name if he wanted before confirming the
entries.
I tried to incorporate what I had learnt from the videos, such as
conditionals, error handling, functions etc... and write it how I would
write code in future.
Please if you are kind enougth to take the time to provide feedback I
would
appreciate that it is constructive :)
The script is here: http://bpaste.net/show/10658/
Your code is very readable...more so than some experienced people ;^)
A few suggestions (and assuming Python 3.X, since that's what it looks
like):
* list shadows a built-in type, and should not be used for variable
names. names would be more appropriate.
* input() return a string, so no need for str(input(...)).
* range(x) is equivalent to range(0,x).
* The two loops in InitiateEntries can be consolidated:
for In in range(NumItems):
names.append(input(Enter name {}: .format(In+1)))
Or using a list comprehension:
names = [input(Enter name {}: .format(In+1) for In in
range(NumItems)]
* Prefer for name in names: instead of using indexing, or for
idx,name in enumerate(names): if indexes are needed. Example:
for idx,name in enumerate(names):
print({}: {}.format(idx,name)
* Since 1-based indexing was used elsewhere to present names to the
user, the PrintEntries display code should also use idx+1.
* When returning a boolean value, you can simpify:
if confirmed == 'n':
return True
else:
return False
To:
return confirmed == 'n'
Also see PEP8 (http://www.python.org/dev/peps/pep-0008/) for Python's
suggested coding standard.
-Mark
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[Tutor] Fw: rights
fowarding to group, please use reply-all when replying.
Alan Gauld
Author of the Learn To Program website
http://www.alan-g.me.uk/
- Forwarded Message
From: Chris King g.nius...@gmail.com
To: Alan Gauld alan.ga...@btinternet.com
Sent: Friday, 5 November, 2010 0:48:51
Subject: Re: [Tutor] rights
On 11/1/2010 8:43 PM, Alan Gauld wrote:
Chris King g.nius...@gmail.com wrote
You give the user account executing the script rights to read the folder.
HTH,
It was a folder on my desktop, which I can always read, right, and
destroy.
I ran it on that user.
In that case we probably need to see:
1) What OS?
2) What does the code look like?
3) How are you running it?
4) What error messages do you get?
Also, is it a folder you are trying to read or a file?
They are not the same.
I'm trying to get the raw binary of a file in linux or windows.
When I run:
f = open('C:/Documents and Settings/family/Desktop/Tuxpaint', 'rb')
in Windows, it raises:
Traceback (most recent call last):
File pyshell#1, line 1, in module
f = open('C:/Documents and Settings/family/Desktop/Tuxpaint', 'rb')
IOError: [Errno 13] Permission denied: 'C:/Documents and
Settings/family/Desktop/Tuxpaint'
Can you help?
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Re: [Tutor] argparse: how to use the returned Namespace object?
On Fri, 2010-11-05 at 01:11 +, Walter Prins wrote: You need to distinguish between what __dict__ *is*, and what it *contains*. dir() does introspection, it inspects what an object in Python *is*, e.g. displays all the methods and attributes of the object. It does not however know anything about what (if anything) the object might contain, in the data storage sense. [...] Thank you Walter, now I got it. :) Mac. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] querying the name of a calling python file
For a while now I have been using the command below in a python file to determine the name of the python file that I use to launch an application (i.e.IF I go 'python junk.py' I want to get 'junk.py'). The command I have use that I came across somewhere some time ago was sys.modules['__main__'].__dict__['__file__'] Now this works fine for the standard python interpretter but when I use ipython (I'm using the enthought distribution 6.1) this command returns /Library/Frameworks/Python.framework/Versions/6.1/lib/python2.6/site-packages/IPython/FakeModule.py I discovered this when I was tracking down inconsistencies/errors between the matplotlib in the enthought distribution depending on whether you use python or ipython. My question is this: Is the way I'm getting the file name the recommended way or did I pick up a bit of flaky advice? I'm puzzled by the matplot lib errors (the y axes on imgshow() show problems in python but appear to 1st order to be OK in ipython) ... but I'll pursue that at the Matplotlib, enthought and ipython forums once I've been able to run a broader cross-section of my codes. Prof Garry Willgoose, Australian Professorial Fellow in Environmental Engineering, Director, Centre for Climate Impact Management (C2IM), School of Engineering, The University of Newcastle, Callaghan, 2308 Australia. Centre webpage: www.c2im.org.au Phone: (International) +61 2 4921 6050 (Tues-Fri AM); +61 2 6545 9574 (Fri PM-Mon) FAX: (International) +61 2 4921 6991 (Uni); +61 2 6545 9574 (personal and Telluric) Env. Engg. Secretary: (International) +61 2 4921 6042 email: garry.willgo...@newcastle.edu.au; g.willgo...@telluricresearch.com email-for-life: garry.willgo...@alum.mit.edu personal webpage: www.telluricresearch.com/garry Do not go where the path may lead, go instead where there is no path and leave a trail Ralph Waldo Emerson ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] querying the name of a calling python file
On 05-Nov-2010, at 4:45 PM, Garry Willgoose wrote: For a while now I have been using the command below in a python file to determine the name of the python file that I use to launch an application (i.e.IF I go 'python junk.py' I want to get 'junk.py'). The command I have use that I came across somewhere some time ago was sys.modules['__main__'].__dict__['__file__'] Now this works fine for the standard python interpretter but when I use ipython (I'm using the enthought distribution 6.1) this command returns /Library/Frameworks/Python.framework/Versions/6.1/lib/python2.6/site-packages/IPython/FakeModule.py I discovered this when I was tracking down inconsistencies/errors between the matplotlib in the enthought distribution depending on whether you use python or ipython. My question is this: Is the way I'm getting the file name the recommended way or did I pick up a bit of flaky advice? I'm puzzled by the matplot lib errors (the y axes on imgshow() show problems in python but appear to 1st order to be OK in ipython) ... but I'll pursue that at the Matplotlib, enthought and ipython forums once I've been able to run a broader cross-section of my codes. Try the following code: === #!/usr/bin/env python import sys print sys.argv === ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Looking for a tutor to review my code and provideconstructive feedback.
*#Your code is very readable...more so than some experienced people ;^)*
Thank you, that is very motivating that I am at least on the right track!
#A few suggestions (and assuming Python 3.X, since that's what it looks
like):
Yeah it is 3.1, forgot to mention that.
# * list shadows a built-in type, and should not be used for variable
names. names would be more appropriate.
I used list as it was a list and therefore new what argument to pass. I did
not even consider that this would be confusing! Thank you for pointing it
out.
# * input() return a string, so no need for str(input(...)).
# * range(x) is equivalent to range(0,x).
Thank you, I will note these for future code :)
#* The two loops in InitiateEntries can be consolidated:
Thank you, Seems a much better way or doing it.
#* Prefer for name in names: instead of using indexing, or for idx,name
in enumerate(names): if indexes are needed. Example:
# * Since 1-based indexing was used elsewhere to present names to the user,
the PrintEntries display code should also use idx+1
I thought that by using an index would be an easy way for the user to select
which element of the list to edit. Not seem the enumerate keyword before so
I will look up what that does :)
.
# * When returning a boolean value, you can simpify:
Ah, thank you!
Really useful feedback, I will note the points highlighted for my next
mini-project. I feel it is important that I am writing proper code before
moving onto learning modules and such.
On 5 November 2010 08:32, Mark Tolonen
metolone+gm...@gmail.commetolone%2bgm...@gmail.com
wrote:
Glen Clark gle...@gmail.com wrote in message
news:aanlktimabbj8ae35q3ao9+xzbvtnyzbz3wrudahmn...@mail.gmail.com...
Hello,
I have completed my first python script. This is after watching a video
guide on python and is my first attempt at writing code in python. While
the
code is not very useful I got the idea for it when googling python
projects
for beginners.
The idea was to create a script that asked the user to input a list of
names
and allow the user to change a name if he wanted before confirming the
entries.
I tried to incorporate what I had learnt from the videos, such as
conditionals, error handling, functions etc... and write it how I would
write code in future.
Please if you are kind enougth to take the time to provide feedback I
would
appreciate that it is constructive :)
The script is here: http://bpaste.net/show/10658/
Your code is very readable...more so than some experienced people ;^)
A few suggestions (and assuming Python 3.X, since that's what it looks
like):
* list shadows a built-in type, and should not be used for variable
names. names would be more appropriate.
* input() return a string, so no need for str(input(...)).
* range(x) is equivalent to range(0,x).
* The two loops in InitiateEntries can be consolidated:
for In in range(NumItems):
names.append(input(Enter name {}: .format(In+1)))
Or using a list comprehension:
names = [input(Enter name {}: .format(In+1) for In in
range(NumItems)]
* Prefer for name in names: instead of using indexing, or for idx,name
in enumerate(names): if indexes are needed. Example:
for idx,name in enumerate(names):
print({}: {}.format(idx,name)
* Since 1-based indexing was used elsewhere to present names to the user,
the PrintEntries display code should also use idx+1.
* When returning a boolean value, you can simpify:
if confirmed == 'n':
return True
else:
return False
To:
return confirmed == 'n'
Also see PEP8 (http://www.python.org/dev/peps/pep-0008/) for Python's
suggested coding standard.
-Mark
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Re: [Tutor] Looking for a tutor to review my code and provide constructive feedback.
Thank you very much for the feedback Luke. I have taken it onboard. I especially like the .lower().strip()[0] method ^^ Regards, G On 4 November 2010 22:38, Luke Paireepinart rabidpoob...@gmail.com wrote: Also for your confirm entries read about sentinel values for while loops. It saves you repeating the conditional in the loop body. And you might want to .lower().strip()[0] the input choice so that they can use y, Y, yes, or whatever. Remember, users suck at generating accurate and correct input so don't give them any credit you can avoid. - Sent from a mobile device with a bad e-mail client. - On Nov 4, 2010, at 3:10 PM, Glen Clark gle...@gmail.com wrote: Hello, I have completed my first python script. This is after watching a video guide on python and is my first attempt at writing code in python. While the code is not very useful I got the idea for it when googling python projects for beginners. The idea was to create a script that asked the user to input a list of names and allow the user to change a name if he wanted before confirming the entries. I tried to incorporate what I had learnt from the videos, such as conditionals, error handling, functions etc... and write it how I would write code in future. Please if you are kind enougth to take the time to provide feedback I would appreciate that it is constructive :) The script is here: http://bpaste.net/show/10658/ http://bpaste.net/show/10658/ ___ Tutor maillist - Tutor@python.orgTutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Server
On 11/4/2010 9:46 PM, Corey Richardson wrote: On 11/4/2010 8:43 PM, Chris King wrote: Dear Tutors, May server and client programs aren't working. They basically simplify socket and SocketServer. Run them directly to test them. They do work locally. They don't work from one computer to the next on the same network. Please Help. Sincerely, Me, Myself, and I P.S. How to you stop a server loop and open up the port? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor When ever I have worked on network, it's always been a firewall issue. If you are using Windows, turn off the built-in firewall. That's what fixed my problems. Hope it helped, ~Corey make sure you click reply to all, so you don't just send it to me also, it is on the same network, so the server shouldn't be a problem ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Displaying picture and Text Downloads
I just realized I did the same thing - must have hit reply to one instead of reply to all :} I had a followup question for you all - and would like to know the answer to Alan's question about print quality - below - Patty - Original Message - From: Patty pa...@cruzio.com To: Alan Gauld alan.ga...@btinternet.com Sent: Thursday, November 04, 2010 11:14 AM Subject: Re: [Tutor] Displaying picture and Text Yes, I would like to know this, I want this function to be really modular and I thought of something else. If my solution turns out to be using Tkinter functions only then wouldn't that mean I downloaded and am 'import'ing the Image library for nothing? This might mean the second addon library I download the source and documentation for. So how are people keeping their customized system organized? I could come up with all sorts of scenarios of losing track of libraries, having too many you never use, and doc you never use, etc. Patty - Original Message - From: Alan Gauld alan.ga...@btinternet.com To: tutor@python.org Sent: Thursday, November 04, 2010 10:39 AM Subject: Re: [Tutor] Displaying picture and Text Alan Gauld alan.ga...@btinternet.com wrote fhdl = Image.open(C:\Users\StarShip\PyProgs\\bbsparkle.gif) fhdl.show() The Tkinter PhotoImage object can display jpg. I can't recall if it does gifs. Sorry I got that wrong, it can display gifs but not jpgs (despite the fact that jpgs are used more often for photos than gifs!) So you will need to convert the jpg to a gif - which might lose a lot of quality! Anyone know of a way to get decent quality in a Tkinter image? Is there any support in PIL itself? Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Server
Chris King g.nius...@gmail.com wrote If you are using Windows, turn off the built-in firewall. That's what fixed my problems. ~Corey also, it is on the same network, so the server shouldn't be a problem I think Corey means the firewall on your PC if you have one. It could be blocking outgoing traffic to uncommon port numbers or somesuch. Its worth trying if only to eliminate the possibility Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
Terry Carroll carr...@tjc.com wrote On Windows, I do something along the lines of this: startpoint=D:/ for (root, dirs, files) in os.walk(startpoint): (stuff) What would I use for startpoint in Linux? I don't use Ubuntu so don;t know the standard anmswer there but it will depend on where the CD is mounterd. I usually mount cdroms on /dev/cdrom But I don't use a standdard distro so set up the mount myself (based on where I did itr when I had a Sun workstation!). If you have access to the Linux box can you use a file mamnager type program to see where it is mounted? Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Displaying picture and Text Downloads
Patty pa...@cruzio.com wrote I had a followup question for you all - and would like to know the answer to Alan's question about print quality - below - A Google search led me to this page which seems to offer a solution using PIL anmd a module called ImageTk: http://codeidol.com/python/python3/A-Tkinter-Tour,-Part-1/Viewing-and-Processing-Images-with-PIL/ I've never tried it so I'll be interested to hear if it works for you... Alan G., ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
Alan Gauld wrote: I don't use Ubuntu so don;t know the standard anmswer there but it will depend on where the CD is mounterd. I usually mount cdroms on /dev/cdrom Surely that's where you mount cdroms *from*? I can't think that using /dev/cdrom as the mount point would be a good idea! Anyway, more modern Linux systems automatically mount CDs and DVDs. By convention, /mnt/... is used for manually mounts, and /media/... for automatic mounts of media. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Hi
Hi everyone, I'm just about to begin to learn python and have bookmarked a number of sites to learn from http://www.alan-g.me.uk/ is the main one but after reading this On Nov 4, 2010, at 3:10 PM, Glen Clark gle...@gmail.com wrote: Hello, I have completed my first python script. This is after watching a video guide on python and is my first attempt at writing code in python. While the code is not very useful I got the idea for it when googling python projects for beginners. I was interested in which video tutorials Glen was watching, and if anyone else could recommend some video tutorials to watch, mainly because of a mild dyslexia and preference for video tutorials. I have been learning Autodesk 3d Studio Max http://south-apac.autodesk.com/adsk/servlet/pc/index?siteID=1157326id=15474303 for several years and learning it's scripting language Maxscript http://rosettacode.org/wiki/Category:MAXScript and since Autodesk now own all the competitors software and they all (except Max) use Python for their coding I thought it would be the way to go when learning a new language. Blender also uses Python btw. My 3d site http://lukepettit-3d.blogspot.com/ -- Luke Pettit ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
On Sat, 6 Nov 2010, Steven D'Aprano wrote: Anyway, more modern Linux systems automatically mount CDs and DVDs. By convention, /mnt/... is used for manually mounts, and /media/... for automatic mounts of media. I am seeing my volume in /media ; however, I won't know the volume name when my program runs. I can't use whatever shows up in /media, because there could be more than one drive. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
Terry Carroll wrote: I have a program that traverses the directory of a CDROM using os.walk. I do most of my work on Windows, but some on (Ubuntu) Linux, and I'd like this to work in both environments. On Windows, I do something along the lines of this: startpoint=D:/ What if the user has two CD drives? What if they have a second hard disk mounted on D:/, and a network drive on E:/, and use F:/ or A:/ or Z:/ for the CD drive? If this program is for you, then it is fine to make assumptions about where the CD drive will be mounted, but don't make the mistake of thinking that they're not assumptions. for (root, dirs, files) in os.walk(startpoint): (stuff) What would I use for startpoint in Linux? I've tried /dev/sr0 and /dev/sr0/; neither work. (If I recall correctly, the for-loop just drops through; I'm not at my Linux box right now to confirm.) As a general rule, don't touch anything in /dev unless you know what you're doing. /dev/sr0, and it's more user-friendly name /dev/cdrom, are devices, not folders. This is how low-level programs get access to the raw bytes being read from the device (in this case the CDROM drive) *before* it is turned into files. A number of other mount points (like /dev/cdrom, I think) are links to /dev/sr0; and don't work either. No, of course not. If they're links, that will mean that they are essentially nicknames or aliases. If Fred Smith doesn't respond when you talk to him, then calling him Freddy, Mr Smith, Hey you! or Frederick isn't going to work either. It *does* work to start at /media/VOLUMENAME, where VOLUMENAME is the volume ID of the disc; but my program will not know that. I need to be able to do this without knowing the volume name. Yes, this is because you need to look at the mount point. The mount point is where the CDROM disk is mounted as a file system, in other words, where you can see the files on the disk *as files*. If you want to read the raw bytes off the disk, you open /dev/cdrom as a file and read from it. On Unix and Linux systems, there are two conventions for mounting external media. One is that if you, the user, mount something by hand using the mount command, it gets placed in /mnt (old-school Unix sys admins had keyboards without vowels *wink*). Often people would use subdirectories under /mnt: /mnt/cdrom /mnt/floppy are the two most common ones. The other convention is that modern window/desktop managers like KDE and Gnome will automatically mount devices by name under /media. This is typically for CDs, DVDs, cameras and mobile phones with file storage, USB sticks and portable hard drives, etc. If you only have one CD drive, and no other devices mounted, you can just look at /media and walk over that without caring what the CD drive is called. In other words, just use /media as the starting point, and let os.walk discover the name of the CD under it. But if you might have an external hard drive plugged in, or a USB key, or similar, then you need to find out what the volume name of the mounted CD drive is. That's a good question and I don't have an answer right now. Let me think about it and get back to you. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
Steven D'Aprano wrote: But if you might have an external hard drive plugged in, or a USB key, or similar, then you need to find out what the volume name of the mounted CD drive is. That's a good question and I don't have an answer right now. Let me think about it and get back to you. Well that was easy. You need to query the external tool volname, which should be present on just about any Linux system. Use the subprocess module to call volname /dev/cdrom. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Looking for a tutor to review my code and provide constructive feedback.
One final suggestion to add to the others: Install and use both pylint, and pychecker. That will help ensure you don't make silly errors or omissions and follow a consistent coding style that matches the generally accepted format well. PyLint: http://pypi.python.org/pypi/pylint PyChecker: http://pypi.python.org/pypi/PyChecker/0.8.12 Aside: The easiest way to install these (and many other) Python modules is using Pip: http://pypi.python.org/pypi/pip/0.8.1 Using Pip, installing pylint is just the following command: pip install pylint Likewise for pychecker. Have a good weekend. Walter ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
On Sat, 6 Nov 2010, Steven D'Aprano wrote: Terry Carroll wrote: I have a program that traverses the directory of a CDROM using os.walk. I do most of my work on Windows, but some on (Ubuntu) Linux, and I'd like this to work in both environments. On Windows, I do something along the lines of this: startpoint=D:/ What if the user has two CD drives? What if they have a second hard disk mounted on D:/, and a network drive on E:/, and use F:/ or A:/ or Z:/ for the CD drive? D:/ doesn't enter into it. That's on Windows, I'm asking about Linux. I used D:/ to show a single example of what works on Windows to explain what I am looking for on Linux. In practice, the drive specification will be coming from a config file. It would be D:? on some systems, E:/ on others or maybe both. But my question is not about Windows, which I already have covered. My question is, to put it succinctly: How can one use os.walk to walk a directory structure of a CDROM on LInux when the volume name is not known? On Unix and Linux systems, there are two conventions for mounting external media. One is that if you, the user, mount something by hand using the mount command, it gets placed in /mnt (old-school Unix sys admins had keyboards without vowels *wink*). Often people would use subdirectories under /mnt: /mnt/cdrom /mnt/floppy are the two most common ones. No such luck: t...@vraspberry:~$ ls -pal /mnt total 8 drwxr-xr-x 2 root root 4096 2010-04-23 03:23 ./ drwxr-xr-x 23 root root 4096 2010-10-04 10:42 ../ t...@vraspberry:~$ ls -pal /mnt/cdrom ls: cannot access /mnt/cdrom: No such file or directory t...@vraspberry:~$ ls -pal /mnt/floppy ls: cannot access /mnt/floppy: No such file or directory The other convention is that modern window/desktop managers like KDE and Gnome will automatically mount devices by name under /media. Yes, I mentioned this, but it requires knowing the volume name. If you only have one CD drive, and no other devices mounted, you can just look at /media and walk over that without caring what the CD drive is called. In other words, just use /media as the starting point, and let os.walk discover the name of the CD under it. But that has the same problem I already mentioned in the prior note: what if there's more than one device? The same thing you pointed out above about D:/ Well that was easy. You need to query the external tool volname, which should be present on just about any Linux system. Use the subprocess module to call volname /dev/cdrom. Aha, this looks like it will work; I was starting to think along these lines; I was thinking of reading the output of df, but this is cleaner. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Reading the CDROM in Linux
This is more of a Linux question, but here is some advice: All files under /dev are more or less raw representations of the devices, meaning that /dev/cdrom or /dev/sr0 files represent the CDROM devices, however this is for raw access to the device data, now really for normal use, the sistem may mount this device in another place (like inside the /media directory), so that a directory will represent the contents (filesystem) of the device, which is what you may want to use. In the example that you are using, you may call 'df' from python and parse the data, which more or less is presented in the following format: device, space, used space, mounted directory. What you need the the directory where the device is mounted (the last data), and then you may use walk on that, taking care that the directory is under your media directory so that you won't walk the root directory entirely (your hard disk). You may want to use os.popen or one of the many process modules to call 'df', then parse each line by spliting the spaces or tabs, then the rest is more or less what you are doing right now. Regards, Carlos Ruvalcaba On Fri, Nov 5, 2010 at 5:59 PM, Terry Carroll carr...@tjc.com wrote: Alan Gauld wrote: I don't use Ubuntu so don;t know the standard anmswer there but it will depend on where the CD is mounterd. I usually mount cdroms on /dev/cdrom That's what I figured; I now realize I didn't say so in my email, but it's mounted at /dev/sr0, which is where I came up with that mount point. t...@vraspberry:~$ df . . . /dev/sr0 614350 614350 0 100% /media/MP_04_074 MP_04_074 is the volume name. But in python: import os for (r, d, f) in os.walk(/dev/sr0): print r, d, f ... for (r, d, f) in os.walk(/dev/sr0/): print r, d, f ... for (r, d, f) in os.walk(/dev/cdrom/): print r, d, f ... for (r, d, f) in os.walk(/dev/cdrom): print r, d, f ... for (r, d, f) in os.walk(/dev/cdrom0): print r, d, f ... for (r, d, f) in os.walk(/dev/cdrom0/): print r, d, f ... None of those work; but: for (r, d, f) in os.walk(/media/MP_04_074): print r, d, f ... /media/MP_04_074 ['directory1'] [] (etc.) What I can't figure out is how to do this if my program does not know the volume name. I won't know the colume name in advance, and in fact, I'll be processing one CDROM, replacing it and processing another, etc. ___ Tutor maillist - tu...@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] test
im wondering if im able to mail this list. I sent an email asking for good newbie projects but never saw it post. All i got was the welcome/ info email. LN ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] test
You don't get your own e-mails back. On Fri, Nov 5, 2010 at 11:37 PM, Danyelle Davis ladyni...@gmail.com wrote: im wondering if im able to mail this list. I sent an email asking for good newbie projects but never saw it post. All i got was the welcome/ info email. LN ___ Tutor maillist - tu...@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Displaying Pictures Text
Hi Alan - I tried using ImageTk from the PIL library to display jpegs (and hopefully any picture type) instead of just gif as you suggested below. I read online that these these types of programs should be run from executables not in the interpreter but it crashes and I can't read the error. Here is the program: import Image import ImageTk fhdl = Image.open(C:\Users\StarShip\PyProgs\SuitGirl.jpg) ImageTk.PhotoImage(fhdl) Tested in interpreter and get the following error. I included Image.show() to be sure pic could be displayed and it did come up in HP Photo Viewer just like the gif file did and I tried the PhotoImage() after I got the cursor back Python 2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import Image import ImageTk fhdl = Image.open(C:\Users\StarShip\PyProgs\SuitGirl.jpg) fhdl.show() ImageTk.PhotoImage(fhdl) Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\site-packages\PIL\ImageTk.py, line 113, in __init__ self.__photo = apply(Tkinter.PhotoImage, (), kw) File C:\Python26\lib\lib-tk\Tkinter.py, line 3285, in __init__ Image.__init__(self, 'photo', name, cnf, master, **kw) File C:\Python26\lib\lib-tk\Tkinter.py, line 3226, in __init__ raise RuntimeError, 'Too early to create image' RuntimeError: Too early to create image Alan Gauld alan.ga...@btinternet.com wrote in message news:ib270l$p3...@dough.gmane.org... Patty pa...@cruzio.com wrote I had a followup question for you all - and would like to know the answer to Alan's question about print quality - below - A Google search led me to this page which seems to offer a solution using PIL anmd a module called ImageTk: http://codeidol.com/python/python3/A-Tkinter-Tour,-Part-1/Viewing-and-Processing-Images-with-PIL/ I've never tried it so I'll be interested to hear if it works for you... Alan G., ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] test
Luke Paireepinart wrote: You don't get your own e-mails back. I do. Perhaps it's an option when you sign up? -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Programs for Newbies?
Danyelle Davis wrote: Hi all, Any suggestions for a newbie to program while learning python? I am new to programming and python. What are you interested in? Interested in maths? Write a program to generate prime numbers, or to search for amicable numbers. Look at Project Euler, although (in my opinion) the puzzles there are quite hard are require a lot of maths know-how. Write a number guessing game. Or Hangman or Battleship. Try the Python Challenge: http://www.pythonchallenge.com/ More puzzle sites here, written in other languages but you can solve them in Python if you like: http://sixrevisions.com/resources/10-puzzle-websites-to-sharpen-your-programming-skills/ Unfortunately, most of them seem to be aimed at people who aren't newbies. I think the world needs a good set of programming puzzles for beginners. Good luck! -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Programs for Newbies?
Danyelle Davis wrote: Hi all, Any suggestions for a newbie to program while learning python? I am new to programming and python. Here's a few suggestions: Write a program that asks the user to enter a word, then counts how many vowels and consonants are in the word. Write a program that asks the user for a list of numbers, separated by spaces or commas, and then calculated the average. A program that prints the time. A program that prints how many days to go until their next birthday. A program that counts how many palindrome numbers there are between two other numbers. (A palindrome number is one like 12321, or 473374.) A program that sings (well, prints) the There were ten in the bed song. If you don't know it, it is a children's song. You start off by holding up ten fingers, or you can use actual children. You don't have to start with ten. Then you sing: There were ten in the bed, and the little one said, Roll over! Roll over! And they all rolled over and ONE FELL OUT! There were nine in the bed, and the little one said, Roll over! Roll over! And they all rolled over and ONE FELL OUT! There were eight in the bed, and the little one said, ... Well you get the idea. Eventually you've left with only the little one left, and the song ends: There was one in a bed, and the little one said Good night! -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
