[Tutor] Allocation of serial ports
Thank you for reading this. This question is not specifically related to Python, however, someone may be able to point me in the right direction. The operating system in use is Linux. I have a twin USB to serial adaptor that gives me ttyUSB0 and ttyUSB1 and my programme uses both of those ports. The problem is the random allocation of the ports. Port A, for example, could be either ttyUSB0 or ttyUSB1. So, how can I ensure that port A is always ttyUSB0 or how can I adapt my programme so that the address of the port is known to the programme? -- Regards, Phil ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Allocation of serial ports
Hi, >So, how can I ensure that port A is always ttyUSB0 http://hintshop.ludvig.co.nz/show/persistent-names-usb-serial-devices/ -nik ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python scope and variable binding
On 11/29/2013 06:20 AM, eryksun wrote:
On Wed, Nov 27, 2013 at 10:04 AM, Arnaud Legout wrote:
[...]
For what it's worth, a personal point of view on Python class defs. I ended up
undertanding class definitions as code blocks the following way:
Imagine Python has kinds of free sections of code (like Lua or C, and many other
languages), but using "section" as keyword like so, which permits to name such
sections:
section Def_Write_i:
i = 1
print(i)
Def_Write_i is a block of code, like a func, or a branch of an 'if' statement,
or a loop body. Unlike a func, it cannot be called, it is just executed on the
way. I could serve to struture code (I actually would enjoy that).
Now, add to this that such as section's scope (namespace) is permanent like an
object (like an object's __dict__), instead of transient like function scopes:
and you get classes as code blocks and namespaces. [C's function-local static
vars are somewhat similar: they remain; but unlike Python's class vars they are
not accessible from outside the func.]
In Lua, definition of an "object-like" table is similar, but unlike for Python
classes it cannot refer to itself or its own local vars, because at definition
time the object (the table) does not yet exists as such:
t = {
i = 1,
j = i+1,-- error
k = t.i+1, -- error as well
}
To reproduce the functionality of Python classes, it should be (but is not) that
the above code is equivalent to:
t = {}
t.i = 1
t.j = t.i+1
t.k = t.i+1
Also, there cannot be any other statement there but assignments.
I used to use this weird feature of Python classes to make free, permanent, and
even computable scopes. For instance, to define parsers: sets of named patterns,
with higher-level ones building on lowel-level ones:
class ArithParser(Parser):
digit = Range("0-9")
natural = String(digit)
natural.test("123") ### debug ###
integer = Comp(Option('-'), natural)
...
In addition, one can have such free namespaces initialised and given other
attributes:
arith_parser = ArithParser() # init & get instance attributes defined in
Parser
Denis
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Re: [Tutor] pygame error
On Thu, Nov 28, 2013 at 12:43:17AM +0530, Vipul Sharma wrote:
> Hello ! I am a beginner in pygame, i was just trying a simple pygame
> program where I wanted to load an image (.png) from the same directory
> where my actual source code was.
> I wrote this line in my source code to load the image :
>
> Img = pygame.image.load('cat.png')
>
> But I got a traceback :
>
> pygame.error: File is not a Windows BMP file
>
> Can anyone pls tell what is the problem with the code, why this error
> arises ?
Is the error message not clear enough? The file is a PNG file, not a
Windows BMP file.
By default, pygame only supports BMP images. If you want to use a more
useful range of image types, like PNG, JPG, and so forth, you need to
build pygame with image support.
See here for more information:
http://www.pygame.org/docs/ref/image.html
--
Steven
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Re: [Tutor] Allocation of serial ports
On 11/29/2013 06:17 PM, Dominik George wrote: Hi, So, how can I ensure that port A is always ttyUSB0 http://hintshop.ludvig.co.nz/show/persistent-names-usb-serial-devices/ Thank you Dominik, the link answers my question exactly. -- Regards, Phil ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] TypeError: range() integer end argument expected, got float.
Hi Newbie at this. I am getting this error: TypeError: range() integer end argument expected, got float. Using python 7.3 here is my code def PaymentTable(balance, annualInterestRate, payment): month = 0 while month < 12: balance = balance - payment interest = balance * (annualInterestRate/12) balance = balance + interest month += 1 if balance <= 0: return True balance = 4773 annualInterestRate = .2 monthlyinterest = balance * (annualInterestRate/12) lowerbound = round(balance / 12, 0) upperbound = round((balance + (monthlyinterest * 12)) / 12, 0) for payment in range(lowerbound, upperbound, 10): if PaymentTable(balance, annualInterestRate, payment) == True: Error occurs at this line print 'Lowest Payment: ', payment break Richard Roth ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] empty delimiters, and None
I run Inkscape (an Open Source vector drawing application) on OSX (Snow
leopard) installed via .dmg pkg. The application ships with a collection of
Python extensions, one of which Measure Path, failed to execute.
I could not find a reference for this issue in the Inkscape archives, and I
tried and worked with other workarounds including a javascript (outside
Inkscape) to find the length of Bézier paths, but eventually I raised the issue
and contacted launchpad/inkscape (question #239599) but to limited avail. After
much continued searching I then found this Bug #803791 report which describes
(as an aside) the exact same issue together with a solution.
I know next to nothing about Python and I shall be glad if any Python guru can
make clear (in layman's terms where possible) what the problem is/was and how
the fix works.
I remembered an alternative posting that I had read, which reported that Python
dislikes empty delimiters. So I took a slightly different approach to the one
mentioned in the above bug report. Instead of removing line 35 from the Measure
Path script I replaced the empty delimiters with the Python constant None. To
my great delight as well as my own amazement the 'fix' worked.
The problem may or may not be limited to OSX.
On trying to run the script (before the fix) I had the following traceback
message:
File "measure.py", line 35, in
locale.setlocale(locale.LC_ALL, '')
File
"/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/locale.py",
line 494, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting
If I booted from the Unix file I received the following feedback:
Setting Language: .UTF-8
(process:82224): Gtk-WARNING **: Locale not supported by C library.
Using the
fallback 'C' locale.
Line 35 (above) shows the empty delimiter. The fix that I applied was to
replace line 35 in the Measure.py script with:
locale.setlocale(locale.LC_ALL, None). The Measure Path script then executes
correctly. No other action is/was required.
I note also the Python 2 library entry for Built-in Constants as:
None
The sole value of types.NoneType. None is frequently used to represent the
absence of a value, as when default arguments are not passed to a function.
Changed in version 2.4: Assignments to None are illegal and raise a SyntaxError.
And under standard type hierarchy as:
None
This type has a single value. There is a single object with this value. This
object is accessed through the built-in name None. It is used to signify the
absence of a value in many situations, e.g., it is returned from functions that
don’t explicitly return anything. Its truth value is false.
I have run the various scripts in a Python Validator, and line 35 (both
versions) pass unremarked, although there are a few other code errors and
warnings and many pep8 warnings.
I have also looked at locale.py Line 494 of which is the last line of a def
(def function?) I include this below, hopefully this may save you searching for
locale.py (Pyhon 2.6) should you need it and wish to answer the above
questions, it may help.
def setlocale(category, locale=None):
""" Set the locale for the given category. The locale can be
a string, a locale tuple (language code, encoding), or None.
Locale tuples are converted to strings the locale aliasing
engine. Locale strings are passed directly to the C lib.
category may be given as one of the LC_* values.
"""
if locale and type(locale) is not type(""):
# convert to string
locale = normalize(_build_localename(locale))
return _setlocale(category, locale)
Many, many thanks for your interest and considering matters.
-A
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Re: [Tutor] Pretty printing XML using LXML on Python3
Thank you, eryksun. using tounicode seems to work on this small piece of code. It still has issues with my code which is generating a big XML code. I will figure out why. -SM On Thu, Nov 28, 2013 at 2:45 PM, eryksun wrote: > On Thu, Nov 28, 2013 at 2:12 PM, SM wrote: > > Run with Python3: > > > > $ python3 testx.py > > b'\n \n some text\n\n' > > print() first gets the object as a string. tostring() returns bytes, > and bytes.__str__ returns the same as bytes.__repr__. You can decode > the bytes before printing, or instead use tounicode(): > > >>> s = etree.tounicode(root, pretty_print=True) > >>> print(s) > > > some text > > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] TypeError: range() integer end argument expected, got float.
Hi, > Using python 7.3 I think we must update 'import antigravity' to say something about python-driven flux capacitors :þ ... > def PaymentTable(balance, annualInterestRate, payment): You should not CamelCase function names. > upperbound = round((balance + (monthlyinterest * 12)) / 12, 0) Your error is because round() does not cast to int. It produces an integer number in a strict mathematical sense, but not as a data type. Use int() for that. > for payment in range(lowerbound, upperbound, 10): > if PaymentTable(balance, annualInterestRate, payment) == True: Error > occurs at this line > print 'Lowest Payment: ', payment > break A few notes about that. 1. You mentioned above that you use Python 7.3. As already said, I do not know what that is, because right now there is Python 2.x and 3.x. I assumed you meant 3.3, because that is widely used, but in that case, your print statement would not work. print() is a function, please get used to that. 2. Do not compare with True. Either the expression is True, or it is False. No need to be redundantly explicit ;). 3. There might be a more pythonic way to find the lowest payment. List comprehensions and min() come to mind; however, due to your naming conventions I do not fully understand what the code is supposed to find. Something called PaymentTable is supposed to return a table-like thing, not a boolean. Maybe you should get a bit more into detail about that (comment your code, for example ;)) and help us give you more hints on it. Cheers, Nik -- * mirabilos is handling my post-1990 smartphone * Aaah, it vibrates! Wherefore art thou, demonic device?? PGP-Fingerprint: 3C9D 54A4 7575 C026 FB17 FD26 B79A 3C16 A0C4 F296 signature.asc Description: Digital signature ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] TypeError: range() integer end argument expected, got float.
On Fri, Nov 29, 2013 at 02:24:49PM -0500, spine...@aol.com wrote: > Hi > > > Newbie at this. I am getting this error: > TypeError: range() integer end argument expected, got float. Note carefully that the error here is with the range() function. In your code, you have: > for payment in range(lowerbound, upperbound, 10): > if PaymentTable(balance, annualInterestRate, payment) == True: Error > occurs at this line You are mistaken about where the error occurs. It occurs on the *previous* line, the one that says "for payment in range...". You have three arguments for range. All three need to be integers (whole numbers, like 0, 1, 2, ...) not floats (numbers with decimal points like 2.5, 5.25, or even 7.0). Even if the fraction part is "point zero", Python will insist it is a float. You have two solutions here: the best one is to go back to where you define lowerbound and upperbound and make sure they are whole numbers with no decimal point. The less-good solution is to change the line to this: for payment in range(int(lowerbound), int(upperbound), 10): -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] empty delimiters, and None
On Fri, Nov 29, 2013 at 8:19 AM, wrote: > > On trying to run the script (before the fix) I had the following traceback > message: > File "measure.py", line 35, in > locale.setlocale(locale.LC_ALL, '') > File > "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/locale.py", > line 494, in setlocale > return _setlocale(category, locale) > locale.Error: unsupported locale setting > > If I booted from the Unix file I received the following feedback: > Setting Language: .UTF-8 > (process:82224): Gtk-WARNING **: Locale not supported by C library. Using > the fallback 'C' locale. It looks like you have a misconfigured environment. ".UTF-8" is missing the language, such as "en_GB.UTF-8". locale.setlocale calls the C runtime setlocale. Passing an empty string as the 2nd argument instructs setlocale to use the environment variables LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, LC_MONETARY, LC_NUMERIC, LC_TIME, and LANG. It uses the first one it finds. The search order might vary depending on the implementation. Just check them all: os.environ["LANG"], etc. If you pass None (translated to NULL in the C call) as the 2nd argument, then it only queries the current locale. This avoids the immediate problem without really fixing it. The process will use the default "C" locale. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] empty delimiters, and None
On Fri, Nov 29, 2013 at 08:19:37AM -0500, uga...@talktalk.net wrote:
[...]
> After much continued searching I then found this
> Bug #803791 report which describes (as an aside) the exact same issue
> together with a solution.
It might help if you provide a link to that bug report. Remember, you've
read it, but we haven't.
> I know next to nothing about Python and I shall be glad if any Python
> guru can make clear (in layman's terms where possible) what the
> problem is/was and how the fix works.
>
> I remembered an alternative posting that I had read, which reported
> that Python dislikes empty delimiters.
In general, that is certainly not true. Empty delimiters like [], '', {}
and even () are legal and perfectly accepted in Python in many places.
More context would be needed.
[...]
> On trying to run the script (before the fix) I had the following traceback
> message:
> File "measure.py", line 35, in
> locale.setlocale(locale.LC_ALL, '')
> File
> "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/locale.py",
> line 494, in setlocale
> return _setlocale(category, locale)
> locale.Error: unsupported locale setting
Ah, now we're getting somewhere!
The locale settings control the internationalization of your operating
system. For example, instead of everything being English all throughout
the world, using locale, your computer can display buttons and menus in
Greek when in Greece, in Japanese in Japan, and so on, provided the
correct settings are available.
The locale.setlocale() function takes two arguments, the first
locale.LC_ALL is okay, the problem is with the second one. Originally it
was set to the empty string '' which tells Python to return the current
locale. Python complains about that which means either:
- your system has no locale set at all;
- your system is set to use a locale which has been removed from
your computer.
To fix this, you can set an environment variable. I don't know how to do
this in OS-X, but in Linux systems I would edit my .bashrc config file
and add the line:
export LANG="blah blah blah"
where "blah blah blah" is the name of a locale. You can find out which
locales are available by running the system command:
locale -a
at the shell. If you need help doing this, you can try asking here, with
luck somebody will know how to do this on a Mac.
For reference, here is the relevant part of the docs:
http://docs.python.org/2/library/locale.html#locale.setlocale
> If I booted from the Unix file I received the following feedback:
> Setting Language: .UTF-8
> (process:82224): Gtk-WARNING **: Locale not supported by C library.
Using the
> fallback 'C' locale.
I have no idea what you mean by this, sorry. What does "booted from the
Unix file" mean?
> Line 35 (above) shows the empty delimiter. The fix that I applied was
> to replace line 35 in the Measure.py script with:
> locale.setlocale(locale.LC_ALL, None). The Measure Path script then
> executes correctly. No other action is/was required.
I'm glad that this fixes the problem for you, but I'd be wary about
leaving None in place. Passing None rather than '' does subtly different
things, and I'm not sure if the Measure Path script does what it is
supposed to do with None in place.
Still, it appears to work, and I guess that provided there are no
obvious problems with it, it seems harmless enough.
The best thing would be to report this problem, and the apparent fix, to
the author of the Measure Path script, and see what he or she thinks
about it.
> I note also the Python 2 library entry for Built-in Constants as:
> None
> The sole value of types.NoneType.
[...]
Thanks for that, but we're very familiar with None, as Python
programmers you can barely go five minutes without needing to use None
or see None in a piece of code.
--
Steven
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Re: [Tutor] empty delimiters, and None
On Fri, Nov 29, 2013 at 5:44 PM, Steven D'Aprano wrote: > Originally it was set to the empty string '' which tells Python to > return the current locale. Rather, an empty string instructs it to set the locale based on the environment. The default value of None queries the category's locale. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] IndexError: list index out of range
I have a script that makes use of the Google speech recognition API as
follows:
import shlex
print " say something"
os.system('sox -r 16000 -t alsa default recording.flac silence 1 0.1 1% 1
1.5 1%')
cmd='wget -q -U "Mozilla/5.0" --post-file recording.flac
--header="Content-Type: audio/x-flac; rate=16000" -O - "
http://www.google.com/speech-api/v1/recognize?lang=en-us&client=chromium";'
args = shlex.split(cmd)
output,error = subprocess.Popen(args,stdout = subprocess.PIPE, stderr=
subprocess.PIPE).communicate()
if not error:
a = eval(output)
#a = eval(open("data.txt").read())
confidence= a['hypotheses'][0]['confidence']
speech=a['hypotheses'][0]['utterance']
print "you said: ", speech, " with ",confidence,"confidence"
When I run that script by itself, it works fine.
When I insert the script into a larger program, I get the following error:
ERROR:
Traceback (most recent call last):
File "inga.py", line 146, in
confidence= a['hypotheses'][0]['confidence']
IndexError: list index out of range
If I understand it correctly, the traceback is telling me that there is no
position [0] in my list, but I don't understand how that can be true. I'm
not using the variable "confidence" anywhere else in the program.
Here's the larger script/program into which the offending bits were
inserted, up to the point of the error:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import aiml
import commands
import subprocess
import marshal
import datetime
import os
import os.path
from os.path import exists
###
read sensors #
###
environmental
def environRead():
import serial
from time import sleep
sensors = dict.fromkeys('Sonar1 Sonar2 Sonar3 Sonar4 Dewpoint
Temperature Humidity Light'.split())
arduino = serial.Serial('/dev/ttyACM0', 9600)
sleep(1)
line = arduino.readline().strip()
line = line.lstrip('{').rstrip('}').strip()
envSense = {}
for item in line.split(','):
item = item.strip()
key, value = item.split(':')
key = key.strip()
value = value.strip()
envSense[key]=int(value)
return envSense
end environmental ###
### somatic ##
def somaticRead():
import psutil as ps
cpu = ps.cpu_percent()
mem = ps.virtual_memory()
disk = ps.disk_usage('/')
# need code to strip % out of disk, leaving just hdd = and some number
# convert it all into a dictionary and return it
end somatic ##
###
end sensor read ##
###
###
## facerec
###
from SimpleCV import Camera
import Image
# initialize camera
cam = Camera()
#snap a picture using the camera
img = cam.getImage()
# find the face
faces =
img.findHaarFeatures('/usr/local/share/OpenCV/haarcascades/haarcascade_frontalface_alt.xml')
if faces:
for face in faces:
face.draw()
# crop at box around detected face
cropped = face.crop()
# save to file for processing
im = cropped.copy()
im.save("temp.png")
# process image - grayscale and size
im = Image.open("temp.png").convert("L")
im = im.resize((125, 150), Image.ANTIALIAS)
#delete the temp.png file
# filelist = [ f for f in os.listdir(".") if f.endswith(".png") ]
# for f in filelist:
#os.remove(f)
#save image for face recognizer
im.save("match.png")
subprocess.check_call(["python", "facerec", "match.png", "faceDbase", "18",
"3"])
filelist = [ f for f in os.listdir(".") if f.endswith(".png") ]
for f in filelist:
os.remove(f)
tmp = open("namefile.txt")
name = tmp.read()
#print("Hello " + name)
greet = ("Hello " + name)
print greet
festivalCmd = '(SayText "%s")' % greet
subprocess.Popen(['/usr/bin/festival', '-b', festivalCmd])
# need to add functions for not finding or not recognizing a face
# return from a function
#def get_face(arg):
#some_variable = 10 * arg
#return some_variable
#result = get_face(5)
## end facerec #
## sphinx speech rec will go here ##
##
Re: [Tutor] IndexError: list index out of range
On Fri, Nov 29, 2013 at 08:17:54PM -0500, richard kappler wrote: > I have a script that makes use of the Google speech recognition API as > follows: [...] > args = shlex.split(cmd) > output,error = subprocess.Popen(args,stdout = subprocess.PIPE, stderr= > subprocess.PIPE).communicate() > > if not error: > a = eval(output) A trivial typo here: the line a = eval(output) needs to be indented. More importantly though, this is quite risky. You're downloading data from the internet, then executing it as code. I really, really, really hope you trust the source of that data. By eval()ing their code, you give them complete and total control of your PC -- anything you can do, they can do. It's not just *them* that you have to trust, but anyone in the world who manages to compromise their server or the communication channel between them and you. How safe do you feel? > ERROR: > Traceback (most recent call last): > File "inga.py", line 146, in > confidence= a['hypotheses'][0]['confidence'] > IndexError: list index out of range > > If I understand it correctly, the traceback is telling me that there is no > position [0] in my list, but I don't understand how that can be true. I'm > not using the variable "confidence" anywhere else in the program. It's not "confidence" that has no position 0, but a['hypotheses'], whatever that is. Start by printing a['hypotheses'] and seeing what it contains. My guess is that it probably contains an empty list, []. Here's another reason for avoiding eval(). Presumably a['hypotheses'] is set by the code you download and then eval. That makes it completely opaque -- you can't easily see what it is doing, and if it plays up, you can't do anything about it. It's a complete black box that either works or doesn't work. What can we do about this? Well, if using eval() really is the only way to do this, I'd say the risk is not worth it. That sort of gung-ho attitude to security suggests that it's only a matter of time before the source is hacked, and once they're hacked, anyone using it is vulnerable too. [Aside: This sort of crap really makes me angry -- code injection vulnerabilities are one of the most common ways that viruses, spyware and other malware get into people's computers, and Google should know better than this. If Google actually recommend you use eval() to access their service, that just demonstrates that the Speech Recognition team don't give a monkey's toss for your security.] In the meantime, you can start by printing the code before eval()'ing it. That way at least we can see what it's supposed to be getting. Go back to the lines: if not error: a = eval(output) and change the block to: print(output) a = eval(output) # WARNING WARNING DANGER DANGER print(a) and then we can see what the code was supposed to do and what it actually did. My guess is that it was working before, but you've exceeded some limit on the number of requests per day, or possibly the speech recognition can't make out any words so it just returns an empty list. [soapbox] This is not aimed at you, you're a beginner and can be excused. But the Google techs have NO EXCUSE. I am so effing sick of coders in the 21st century who have no effing clue about even the most common-sense basics of security. No wonder there are so many malware and viruses around. Using eval here is like posting the keys to your house to some arbitrary tradesperson you've never met with instructions "I'll be away all next week, come around whenever you like and do whatever jobs you think need doing." You damn well better trust them, AND the post office. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] IndexError: list index out of range
> > > Here's another reason for avoiding eval(). Presumably a['hypotheses'] is > set by the code you download and then eval. That makes it completely > opaque -- you can't easily see what it is doing, and if it plays up, you > can't do anything about it. It's a complete black box that either works > or doesn't work. > > The API is undocumented, as far as I can tell. That being said, it appears to be JSON-oriented. http://mikepultz.com/2011/03/accessing-google-speech-api-chrome-11/ So the original questioner should use a JSON parser, rather than eval(). For example: http://www.athoughtabroad.com/2013/05/22/using-google-s-speech-recognition-web-service-with-python ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] IndexError: list index out of range
On Fri, Nov 29, 2013 at 8:17 PM, richard kappler wrote:
>
> args = shlex.split(cmd)
> output,error = subprocess.Popen(args,stdout = subprocess.PIPE, stderr=
> subprocess.PIPE).communicate()
Output to stderr doesn't necessarily mean a command failed. The
process returncode is what you need to inspect. Use
subprocess.check_output. It raises a subprocess.CalledProcessError for
a non-zero return code.
> if not error:
> a = eval(output)
Please post plain text to the list. Automatic conversion from rich to
plain text isn't Python friendly.
Don't use eval like this. Google isn't sending Python code in response
to a web query. They're sending JSON data:
import json
output = ('{"status":0,"id":"","hypotheses":'
'[{"utterance":"Python","confidence":0.58060002}]}')
a = json.loads(output)
>>> a['hypotheses'][0]
{u'confidence': 0.58060002, u'utterance': u'Python'}
>>> a['hypotheses'][0]['utterance']
u'Python'
Remember to check the status code. I found a short list, but nothing official:
0 - correct
4 - missing audio file
5 - incorrect audio file
When the speech recognition fails to form a hypothesis, print "Ozzy,
is that you again?" ;)
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