Raspberry Pi Forums

davef21370

Could try catching the exception...

import serial
port=serial.Serial("dev/ttyAMA0",baudrate=57600,timeout=3.0)

while True:
    try:
        out=port.readline()
        print(out)
    except:
        pass

Dave.

davef21370

Sorry, wrong link, try this...
http://mitchtech.net/raspberry-pi-opencv/

That's what I used to install on wheezy.
Dave.

davef21370

ednl's link will give you the result you want but obviously don't copy and paste stuff from Wikipedia, it's a dead giveaway that you've not done the work yourself. The task says to think about the algorithms so start there. Get your number, let's call it 'N'. The highest factor of N will be N/2, cal...

davef21370

You could build a WAV format file and play that, simple(ish) format, have a look here...
https://ccrma.stanford.edu/courses/422/ ... aveFormat/

Dave.

davef21370

Have a look at this post....
http://www.raspberrypi.org/phpBB3/viewt ... cv#p402953
...took a while but installed okay.

Dave.

davef21370

If you need to update the screen as the user types you could use the getch() function from the curses module and build the string to display on the fly.

Dave.

davef21370

https://github.com/TrevorBasinger/Pytho ... es_demo.py

Dave.

davef21370

I've just installed the Python Facebook module using

Code: Select all

sudo apt-get install python-facebook

and all went well.
Now I can't seem to find a working example of how to use it. Just want to try basic stuff, any ideas ?

Dave.

davef21370

Python 2.7 all the way but the GUI is something I'll need to work on, it'll make things so much easier, just need a little time (winter

)

Dave.

davef21370

Okay, as I've already said this project was abandoned halfway through so it's far from complete but this is an example of the core of the program. from tba_constants import * # Non-interactive objects. class obj_sword(object): def __init__(self): self.catagory = OBJ_CAT_WEAPON self.state = OBJ_NO_EX...

davef21370

If you can wait until weekend I'll post some code for, in my opinion, the best way to create a text based adventure. I started it as an interesting way to show how Python classes can work then kind of abandoned it. It has one big con but the pro's far outweigh it, it just needs a workaround. And, to...

davef21370

That Sticky about posting code would be great.

Had a quick look into the original problem and there is a xively module, maybe you should look at using that.

Dave.

davef21370

I've no experience with xively but can give you a couple of tips on asking for help on these forums (or should that be fora?). First off always post your code between the 'Code' tags using the button above the edit box, it makes it much easier to follow, especially in Python. Secondly let us know of...

davef21370

Not sure about opencv but the camera(s) will be listed as /dev/video0, /dev/video1, /dev/video2, etc. so yes, you can have multiple cameras attached.

Dave.

davef21370

I use sudo halt to shut down the Pi but after a few seconds the video stops (HDMI) so how do I know when the Pi has shut down and safe to unplug?

Dave.

davef21370

Having had the Pi and using Linux for the last 12 months I couldn't help but notice that all the software seems to be commercial or free with no middle ground for making a few quid on the side ;) Back in the day (this makes me feel really old when I'm actually only a bit old) we had shareware, if yo...

davef21370

I'm writing a Python module in C that needs to access a 3D PyGame surfarray, here's the function where 'pix' is the surfarray... static PyObject *pycmod_scan(PyObject *self, PyObject *args) { PyObject pix; if (!PyArg_ParseTuple(args, "O", &pix)) return NULL; return 0; } ... How do I convert pix to a...

davef21370

If you just need to display some text in a window have a look at Tkinter, there are loads of examples online, you'll just need to add the network info part.

Dave.

davef21370

Just thought some of you may be interested in this. The Open University have started a series of online courses called FutureLearn. There is quite a diverse range of subjects, one of them being an introduction to programming Java. As I understand it's a 7 week course at just 3 hours per week so easi...

davef21370

Think this is sorted, I need 2 I's in the ParseTuple function.
Makes sense now.

Dave.

davef21370

I'm trying to write a Python module in C. For now it only has 1 function which should return the sum of 2 integers (purely for testing purposes). It builds okay and I can import the module and call the function but with the following error... Traceback (most recent call last): File "/home/pi/Desktop...

davef21370

Google RPi.GPIO and look at some examples, there's loads out there for motor and servo control.

Dave.

davef21370

You can write modules in C then call them from Python...http://docs.python.org/2/extending/extending.html.

Dave.

davef21370

I've a feeling RPi.GPIO comes with the latest Debian installation but could be wrong. Run IDLE and type "import RPi.GPIO", if you don't get an error it's installed. If you don't have it have a look here http://www.raspberrypi-spy.co.uk/2012/05/install-rpi-gpio-python-library/ but be aware it's an ol...

davef21370

Have you tried

Code: Select all

<form action="python /exec/serialtest.py" method="POST">

in you HTML file?

Note the "python" before /exec/serialtest.py.
May work.

Dave.

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