On Wed, Dec 14, 2011 at 6:03 PM, tutor-requ...@python.org wrote:
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Today's Topics:
1. Re: Tuple: Am I Understanding This Correctly? (Alan Gauld)
2. ctype exceptions.ValueError for function call
(Santhirakumaran, Gokul)
3. while loops (rog capp)
4. Re: while loops (Steven D'Aprano)
5. Re: while loops (Dave Angel)
--
Message: 1
Date: Wed, 14 Dec 2011 18:25:33 +
From: Alan Gauld alan.ga...@btinternet.com
To: tutor@python.org
Subject: Re: [Tutor] Tuple: Am I Understanding This Correctly?
Message-ID: jcapmt$7ed$1...@dough.gmane.org
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 14/12/11 15:48, Homme, James wrote:
Am I explaining how this works correctly?
You are not really explaining *how* it works, just saying what it does.
What you are doing is sensible iff you have many places where the tuple
is useful. In the specific case I'd personally just create the tuple at
the point of use:
finish = (user_name, prompt)
likes = raw_input(Do you like me %s?\n%s % finish)
likes = raw_input(Do you like me %s?\n%s % (user_name, prompt))
Since it saves the reader referring back to the definition
of finish (which is an odd nanme for user/prompt data IMHO).
# Use the tuple repeatedly when asking other questions.
But, if you are using the tuple repeatedly then it starts
to make sense.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
--
Message: 2
Date: Wed, 14 Dec 2011 21:15:38 +
From: Santhirakumaran, Gokul
gokul.santhirakuma...@christiedigital.com
To: 'tutor@python.org' tutor@python.org
Subject: [Tutor] ctype exceptions.ValueError for function call
Message-ID:
52784758373d504eb891cd133621a25b0aa51...@cktexmb01.cds.int
Content-Type: text/plain; charset=us-ascii
Hi,
I'm trying to use a SDK(dll file) with python ctypes to take measurement from
a spectrometer. I some how got the deceive connected and took the measurement
, but when I try to call one of its calculation function I'm getting the
exceptions.ValueError: Procedure probably called with not enough arguments
(8 bytes missing) error.
I believe I have called the function with proper arguments and data types. I
would really appreciate some help.
The Function:
mydll =
ctypes.windll.LoadLibrary(D:\\WILD2\\tools\\WildVerification\\lib\\jeti_core.dll)
device = ctypes.c_int()
dvError = mydll.JETI_OpenDevice(0,ctypes.byref(device))
X_value = ctypes.c_float()
Y_value = ctypes.c_float()
Z_value = ctypes.c_float()
dvError =
mydll.JETI_CalcXYZ(device,ctypes.byref(X_value),ctypes.byref(Y_value),ctypes.byref(Z_value))
Function Documentation:
3.112 JETI_CalcXYZ
This function returns the calculated tristimulus XYZ.
3.112.1 Prototype
DWORD JETI_CalcXYZ (DWORD dwDevice, FLOAT *fX, FLOAT *fY, FLOAT *fZ)
3.112.2 Parameters
Input
Name Type Description
Call
dwDevice DWORD Handle to a device as
By value
returned by
JETI_OpenDevice
fX FLOAT* pointer to a variable
By reference
where the tristimulus X
will be stored
fY FLOAT * pointer to a variable
By reference
where the tristimulus Y
will be stored
fZ FLOAT * pointer to a variable
By reference
where the tristimulus Z
will be stored
-
Gokul Santhirakumaran
Electrical Engineer(Co-op)
CHRISTIE
809 Wellington St. N.
Kitchener, ON, Canada N2G 4Y7
PH: +1 519-744-8005 x7313
www.christiedigital.comhttp://www.christiedigital.com
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Message: 3
Date: Wed, 14 Dec 2011 17:41:24 -0500
From: rog capp beetleb...@gmail.com
To: tutor@python.org
Subject: [Tutor] while loops
Message-ID:
CAKP55S=jes4fcocy7hxi_dng2ywsf2mkeqz_9qzztf63edh...@mail.gmail.com
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# Guess my number
#
# The computer picks a random number between 1 and 100
# The player tries to guess it and the computer lets
# the player know if the guess is to high, to low
# or right on
